Case when else: 1.23.15. In this post, we explore the Case-Switch statement in SQL. CASE return must be a single scalar value. To query data from a table, you use the SQL SELECT statement. Then, specify the table name in the FROM clause. When evaluating the SELECT statement, the database system evaluates the FROM clause first and then the SELECT clause. Employees that have the SalariedFlag set to 0 are returned in order by the BusinessEntityID in ascending order. See the example below. reading and return the result. CASE can be used in any statement or clause that allows a valid expression. The SQL Case statement is usually inside of a Select list to alter the output. << First of all, CASE is an expression (scalar value) and not a statement (control flow) as the other posters were telling you. Microsoft SQL Server. The value of the CASE operand and WHEN operands in a simple CASE statement can be any PL/SQL type other than BLOB, BFILE, an object type, a PL/SQL record, an index-by table, a varray, or a nested table. 2. It comes in two forms: SELECT Announcing our $3.4M seed round from Gradient Ventures, FundersClub, and Y Combinator Read more → If one condition is satisfied, it stops checking further conditions We cannot use a Case statement for checking NULL values in a table Conclusion. Use of CASE Expressions in SQL query is sometimes extremely useful.For example Using CASE in SELECT statement provides developer the power to manipulates the data at presentaion layer without changing data at backend.So there are various use of CASE Expressions and it can be used in, including in statements like [SELECT, UPDATE, DELETE, SET ] and … SELECT table_name, CASE owner WHEN 'SYS' THEN 'The owner is SYS' WHEN 'SYSTEM' THEN 'The owner is SYSTEM' ELSE 'The owner is another value' END FROM all_tables; The CASE statement goes through conditions and returns a value when the first condition is Evaluates, in the order specified, Boolean_expression for each WHEN clause. In SQL server, To write if then else in SQL select query we can use SELECT CASE statement (In all versions of SQL server) SELECT IIF logical function (From SQL server 2012) We will take an example Employee table which has columns EmpId, EmpName, Experience, Salary, Gender. If this argument is omitted and no comparison operation evaluates to TRUE, CASE returns NULL. It has the functionality of an IF-THEN-ELSE statement. The following example uses the CASE expression to change the display of product line categories to make them more understandable. This SQL tutorial explains how to use the AND condition and the OR condition together in a single query with syntax and examples. The simple CASE expression compares an expression to a set of simple expressions to determine the result. ELSE else_result_expression Oracle case statement basic syntax. As the data for columns can vary from row to row, using a CASE SQL expression can help make your data more readable and useful to the user or to the application. Decode statement can be used with only SQL DML statements like SELECT, INSERT, UPDATE, DELETE. Hello, I have one table and like to combine multiple select statements in one query. If no conditions are true, it returns Transact-SQL Syntax Conventions. The following example displays the list price as a text comment based on the price range for a product. That is not possible. Here are some examples of the SQL CASE statement in SELECT queries. Employees that have the SalariedFlag set to 1 are returned in order by the BusinessEntityID in descending order. The advantage would be that you can change the data in the table easier than changing all of the queries that have that case statement. The CASE expression evaluates its conditions sequentially and stops with the first condition whose condition is satisfied. Is a simple expression to which input_expression is compared when the simple CASE format is used. The SQL Server CASE statement sets the value of the condition column to “New” or “Old”. SQL WHERE Clause ‘Equal’ or ‘LIKE’Condition. CASE is an expression statement in Standard Query Language(SQL) used primarily for handling conditional statements similar to IF-THEN-ELSE in other programming languages. Alias for case statement: 1.23.16. In the order specified, evaluates input_expression = when_expression for each WHEN clause. The CASE statement goes through conditions and returns a value when the first condition is met (like an IF-THEN-ELSE statement). on Apr 4, 2018 at 16:15 UTC. The statement returns the maximum hourly rate for each job title in the HumanResources.Employee table. select Name, Age, CASE WHEN Age >= 60 THEN 'senior discount' ELSE 'no discount' END AS discount from TestDB.dbo.People Run the query in SQL Server, and you’ll get the following result: Additional Examples of Case Statements >> But it seems to me, it would make more logical sense to filter columns in the query of the SQL Server database versus pulling all the rows of data in and then just throwing it away before it is displayed to the end user. In this statement, you can specify one condition and then specify a code to execute if that condition is true and then specify a second condition and a code to run if that condition is true. Both formats support an optional ELSE argument. I look for a working example where I can use mutliple when case statment wihch check to verify if a specific text is contained: e.g. The following example uses the CASE expression in a SET statement in the table-valued function dbo.GetContactInfo. how to keep multiple case statement result in same row in sql server. The CASE statement is SQL's way of handling if/then logic. Update statement based on case condition: 1.23.14. Case statements are useful when you're dealing with multiple IF statements in your select clause. The CASE expression cannot be used to control the flow of execution of Transact-SQL statements, statement blocks, user-defined functions, and stored procedures. Is the expression returned when input_expression equals when_expression evaluates to TRUE, or Boolean_expression evaluates to TRUE. You can evaluate multiple conditions in the CASE statement. Suppose we want … Inside the GROUP BY clause, we specify that the corresponding count for “New” is incremented by 1, whenever a model value of greater than 2000 is encountered. The CASE statement goes through conditions and return a value when the first condition is met (like an IF-THEN-ELSE statement). Expressions (Transact-SQL) Use two case statements in one select statement: 1.23.17. Example: Sample SELECT statement. The following example uses the CASE expression in an UPDATE statement to determine the value that is set for the column VacationHours for employees with SalariedFlag set to 0. 1. Simple CASE Statement SELECT first_name, last_name, country, CASE country WHEN 'USA' THEN 'North America' WHEN 'Canada' THEN 'North America' WHEN 'UK' THEN 'Europe' WHEN 'France' THEN 'Europe' ELSE … Evaluates a list of conditions and returns one of multiple possible result expressions. You should only depend on order of evaluation of the WHEN conditions for scalar expressions (including non-correlated sub-queries that return scalars), not for aggregate expressions. else_result_expression is any valid expression. The data types of else_result_expression and any result_expression must be the same or must be an implicit conversion. The data types of input_expression and each when_expression must be the same or must be an implicit conversion.THEN result_expressionIs the expression returned when input_expression equals when_expr… When subtracting 10 hours from VacationHours results in a negative value, VacationHours is increased by 40 hours; otherwise, VacationHours is increased by 20 hours. In addition to SELECT, CASE can be used with another SQL clause like UPDATE, ORDER BY. DECODE result type is first decoded expression type, all others are implicitly converted (if needed). Example. In the AdventureWorks2012 database, all data related to people is stored in the Person.Person table. Having looked at the data and knowing that it only contains two types of animal, the SQL CASE could also be written in a more simple way using an ELSE: SELECT ID, Breed, Value, CASE. You need to use SET statement instead for variable assignments but this requires the SELECT statement to be a singleton statement. Syntax GT – Greater than. The Microsoft Access Case statement can only be used in VBA code. Within a SELECT statement, the CASE expression allows for values to be replaced in the result set based on comparison values. For instance, let’s see how we can reference the “AdventureWorks2012” database and show an example of a SQL Case statement. by Rhya. Home. SELECT with DISTINCT on multiple columns and ORDER BY clause. So, once a condition is true, it will stop reading and return the result. Reading an execution plan can be tricky, but in this once you can see the plan is running a merge join. For example, the person may be an employee, vendor representative, or a customer. When the variable is set to 0, all statements after the first statement in the query are ignored when you issue the RUN QUERY command. Needs Answer Microsoft SQL Server. The first takes a variable called case_value and matches it with some statement_list. Returns the result_expression of the first input_expression = when_expression that evaluates to TRUE. Within a SELECT statement, the searched CASE expression allows for values to be replaced in the result set based on comparison values. SELECT MY_NAME FROM EMPLOYEE WHERE MY_NAME LIKE %SRI% or SELECT * FROM EMPLOYEE WHERE MY_NAME = 'SRINIMF' If no input_expression = when_expression evaluates to TRUE, the SQL Server Database Engine returns the else_result_expression if an ELSE clause is specified, or a NULL value if no ELSE clause is specified. Returns result_expression of the first Boolean_expression that evaluates to TRUE. I want to select information from two SQL tables within one query, the information is unrelated though, so no potential joints exist. For example, you can use CASE in statements such as SELECT, UPDATE, DELETE and SET, and in clauses such as select_list, IN, WHERE, ORDER BY, and HAVING. Syntax: There can be two valid ways of going about the case-switch statements. WHEN Breed = 'Golden Retriever' THEN 'Dog'. SELECT table_name, CASE owner WHEN 'SYS' THEN 'The owner is SYS' WHEN 'SYSTEM' THEN 'The owner is SYSTEM' ELSE 'The owner is another value' END FROM all_tables; Case statements are useful when you're dealing with multiple IF statements in your select clause. Moreover, using the CASE function, multiple conditions provided in separate SQL queries can be combined into one, thus avoiding multiple statements on the same table (example given below). select ename, job, sal, case when job = 'clerk' and sal < 1000 then '1' when job = 'clerk' and sal > 1000 then '2' when job = 'manager' and sal > 2900 then '3' end as "Bonus Grade" From Emp Image 6-Case-Multiple-Conditions-In-When We explored the SQL Server CASE statement and also saw the CASE WHEN example. The only most preferred way for you to guarantee that the rows or columns in the result set are sorted is to use the SQL ORDER BY Keyword. An example could be the following setup. Look at the following script: 1. Is the expression returned if no comparison operation evaluates to TRUE. Here is a simple query on some selected columns in orders table where agent_code='A002' SQL Code: SELECT agent_code, ord_amount, cust_code, ord_num FROM orders WHERE agent_code='A002'; Sample table: orders. In some situations, an expression is evaluated before a CASE expression receives the results of the expression as its input. We do not do that in RDBMS! Hi folks, usually, working with an oracle database in a standard SQL-editor multiple sql-statements can be entered in one query separated by a semicolon. Therefore, It means that SQL Server can return a result set with an unspecified order of rows or columns. IF STATEMENT WITH A CASE STATEMENT WITHIN A SQL SELECT. For example, the following query produces a divide by zero error when producing the value of the MAX aggregate. The CASE statement is SQL’s way of handling if/then logic. The simple CASE expression operates by comparing the first expression to the expression in each WHEN clause for equivalency. Next: Microsoft SQL Server 2012 Native Client Scripted Silent Install. Huge difference! Is the Boolean expression evaluated when using the searched CASE format. For example, you can use CASE in statements such as SELECT, UPDATE, DELETE and SET, and in clauses such as select_list, IN, WHERE, ORDER BY, and HAVING. The next disaster is that you have no concept of declarative programming Why are you casting things to NVARCHAR(50) and worse? Announcing our $3.4M seed round from Gradient Ventures, FundersClub, and Y Combinator Read more → Product. So, once a condition is true, it will stop reading and return the result. When subtracting 10 hours from VacationHours results in a negative value, VacationHours is increased by 40 hours; otherwise, VacationHours is increased by 20 hours. You could use the CASE statement in a SQL statement as follows: (includes the expression clause). Active 4 years, 5 months ago. Syntax: ... Query 2: The query returns multiple rows. If no conditions are true, it will return the value in the ELSE clause. The SQL CASE Statement. input_expression is any valid expression.WHEN when_expressionIs a simple expression to which input_expression is compared when the simple CASE format is used. So, once a condition is true, it will stop reading and return the result. If no conditions are true, it returns the value in the ELSE clause. The CASE statement allows you to perform an IF-THEN-ELSE check within an SQL statement. when_expression is any valid expression. Introduction to SQL CASE Statement. The Oracle CASE statements can do all that DECODE does plus lot of other things including IF-THEN analysis, use of any comparison operator and checking multiple conditions, all in a SQL query itself. For more information, see Data Type Precedence (Transact-SQL). We cannot control the execution flow of stored procedures, functions using a Case statement in SQL We can have multiple conditions in a Case statement; however, it works in a sequential model. A case statement evaluates the when conditions if found true, returns the THEN part of the statement and ends. WHEN Boolean_expression The CASE statement can be used in Oracle/PLSQL. The following example uses the CASE expression to change the display of product line categories to make them more understandable. SELECT CASE testStatus WHEN 'A' THEN 'Authorized' WHEN 'C' THEN 'Completed' WHEN 'P' THEN 'In Progress' WHEN 'X' THEN 'Cancelled' END AS Status, CASE testStatus WHEN 'A' THEN authTime WHEN 'C' THEN cmplTime … The semicolon (;) is not the part of a query. the value in the ELSE clause. If there is no ELSE part and no conditions are true, it returns NULL. What it does is evaluates a list of conditions and returns one of the multiple possible result expressions. Hello, I have one table and like to combine multiple select statements in one query. LT – Less than. The searched CASE expression evaluates a set of Boolean expressions to determine the result. Those are IN, LT, GT, =, AND, OR, and CASE. in a WHEN clause, the CASE returns the corresponding result in the THEN clause. Below is a selection from the "OrderDetails" table in the Northwind sample database: The following SQL goes through conditions and returns a value when the first condition is met: The following SQL will order the customers by City. See the example below. Commenting out the CASE eliminates columns from Partner p, Trade t and Trade t2 from the output. CASE can be used in any statement or clause that allows a valid expression. It is a kind of control statement which forms the cell of programming languages as they control the execution of other sets of statements. Summary: In MS SQL, there are two types of CASE: Simple CASE and Searched CASE ; ELSE is optional in the CASE statement. Select query can be used with in decode function. Using the CASE WHEN (with no expression between CASE and WHEN) syntax for a CASE expression, the pattern is: CASE WHEN THEN [ELSE ] END. The CASE statement goes through conditions and return a value when the first condition is met (like an IF-THEN-ELSE statement). IIF (Transact-SQL) WHEN Breed = 'King Charles Spaniel' THEN 'Dog'. The SQL AND condition and OR condition can be combined to test for multiple conditions in a SELECT, INSERT, UPDATE, or DELETE statement. You can use an order by clause in the select statement with distinct on multiple columns. If no condition is satisfied or found FALSE, then it evaluates the ELSE part of the statement and ends. SQL Server allows for only 10 levels of nesting in CASE expressions. Because of this pairing, you might be tempted to call this SQL CASE WHEN, but CASE is the accepted term. When a value does not exist, the text "Not for sale' is displayed. when_expression is any valid expression. Oracle CASE expression syntax is similar to an IF-THEN-ELSE statement. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. Adding multiple conditions to a CASE statement. CASE can be used in any statement or clause that allows a valid expression. THEN (SELECT EmployeeID,Fname,Lname,country from [EmployeeSource]) ELSE 'Name not Found' . The following example uses the CASE expression in an UPDATE statement to determine the value that is set for the column VacationHours for employees with SalariedFlag set to 0. The SELECT statement is one of the most complex commands in SQL, therefore, in this tutorial, we’ll focus on the basics only. Case statements are useful when you're dealing with multiple IF statements in your select clause. In the first example, the value in the SalariedFlag column of the HumanResources.Employee table is evaluated. It comes in two forms: SELECT. For example, you can use CASE in statements such as SELECT, UPDATE, DELETE and SET, and in clauses such as select_list, IN, WHERE, ORDER BY, and HAVING. The data returned is stored in a result table, called the result-set. THEN result_expression select ename, job, sal, case when job = 'clerk' and sal < 1000 then '1' when job = 'clerk' and sal > 1000 then '2' when job = 'manager' and sal > 2900 then '3' end as "Bonus Grade" From Emp Image 6-Case-Multiple-Conditions-In-When We explored the SQL Server CASE statement and also saw the CASE WHEN example. I am using a case statement to achieve this. Errors in evaluating these expressions are possible. In reality, the DBMS query optimizer takes the SQL statement, analyzes it, and then decides on a how to run it. If there is no ELSE part and no conditions are true, it returns NULL. Databases. You can also define a number of outcomes in a CASE statement by including as many WHEN/THEN statements as you'd like:. A SELECT statement that uses a searchable CASE function: 1.23.12. Using the CASE WHEN (with no expression between CASE and WHEN) syntax for a CASE expression, the pattern is: CASE WHEN THEN [ELSE ] END. Aggregate expressions that appear in WHEN arguments to a CASE expression are evaluated first, then provided to the CASE expression. So, once a condition is true, it will stop Ask Question Asked 4 years, 5 months ago. Syntax VBA SELECT CASE is a statement to test multiple conditions. To view Transact-SQL syntax for SQL Server 2014 and earlier, see Previous versions documentation. 2. Use of CASE Expressions in SQL query is sometimes extremely useful.For example Using CASE in SELECT statement provides developer the power to manipulates the data at presentaion layer without changing data at backend.So there are various use of CASE Expressions and it can be used in, including in statements like [SELECT, UPDATE, DELETE, SET ] and … Many variables, such as table size and indexes are taken into account. Is there a "better" way to rewrite a SELECT clause where multiple columns use the same CASE WHEN conditions so that the conditions are only checked once?. Let’s write a SQL Server CASE statement which sets the value of the condition column to “New” if the value in the model column is greater than 2010, to ‘Average’ if the value in the model column is greater than 2000, and to ‘Old’ if the value in the model column is greater than 1990. The function returns the first and last name of a given BusinessEntityID and the contact type for that person.The CASE expression in the SET statement determines the value to display for the column ContactType based on the existence of the BusinessEntityID column in the Employee, Vendor, or Customer tables. In SQL Server, when you use the SELECT statement to query data from the table, the order of rows or columns in the result set is not guaranteed. WHEN Breed = 'Labrador' THEN 'Dog'. First, specify a list of comma-separated columns from which you want to query the data in the SELECT clause. If no Boolean_expression evaluates to TRUE, the Database Engine returns the else_result_expression if an ELSE clause is specified, or a NULL value if no ELSE clause is specified. If there is no ELSE part and no conditions are true, it returns NULL. 1.23.13. Microsoft SQL Docs, CASE (Transact-SQL) Example Query. The SQL SELECT Statement. In this way, you can specify multiple conditions and multiple statements. However, I am getting multiple rows for the test scor... Home. It’s good for displaying a value in the SELECT query based on logic that you have defined. It cannot be used to control flow and execute some other code when a row meets a certain condition. Moreover, using the CASE function, multiple conditions provided in separate SQL queries can be combined into one, thus avoiding multiple statements on the same table (example given below). Is the expression evaluated when the simple CASE format is used. The SELECT statement contains the syntax for selecting columns, selecting rows, grouping data, joining tables, and performing simple calculations. If there is no ELSE part and no conditions are true, it returns NULL. If the ELSE clause is omitted, the system substitutes a default action. Example 3: Assign a value to a variable with a regular SELECT statement. Searched CASE expression looks for the first expression that evaluates to true. CASE is an expression statement in Standard Query Language(SQL) used primarily for handling conditional statements similar to IF-THEN-ELSE in other programming languages. While using W3Schools, you agree to have read and accepted our. DECLARE @COURSE_NAME VARCHAR (10) SELECT … It is pretty easy to view the execution plan for any query. 1.23.13. IN – List. But the real problems are first that you are formatting data in the query. CASE statement in MySQL is a way of handling the if/else logic. In the script above we use the COUNT aggregate function with the CASE statement. If these expressions are equivalent, the expression in the THEN clause will be returned. You could use the CASE statement in a SQL statement as follows: (includes the expression clause). This is called the execution plan. 2. Examples might be simplified to improve reading and learning. Output: … SELECT (Transact-SQL) Update statement based on case condition: 1.23.14. If so, I'll show you 3 different ways to apply your case statements in SQL Server. Rather than putting the data in a case statement where you might have to repeat that case statement in more than one query, you could create a table with static data, then joint to that table. Set the DSQEC_RUN_MQ global variable to 1: set the DSQEC_RUN_MQ global variable to 1: set DSQEC_RUN_MQ... Azure Synapse Analytics Parallel data Warehouse is true, it returns NULL these expressions equivalent! The value in the order specified, Boolean_expression for each when clause equivalency... Years, 5 months ago value ( value1, value2, etc. the database system evaluates the from.. Simple expression to which input_expression is compared when the first expression that evaluates true... Expression as its input Docs, a simple CASE format is used SELECT, CASE returns the value the! This argument is omitted, the text `` not for sale ' is displayed there is no ELSE and. Before and after vacation values global variable to 1: set the DSQEC_RUN_MQ global variable to:. From Gradient Ventures, FundersClub, and Y Combinator read more → product semicolon ( ; is..., joining tables, and, or a customer you use the SQL SELECT microsoft SQL Docs CASE... Returned when input_expression equals when_expression evaluates to true that have the SalariedFlag column of first..., etc. in this way, you use the SQL Server 2012 Native Scripted! Else 'Name not found ' correctness of all content SalariedFlag column of the expression each. Price range for a CASE statement since more rows is SQL ’ s good for displaying a value when simple., =, and CASE and return the result, references, and CASE expression evaluates its conditions sequentially stops... First and THEN the SELECT query based on the price range for a product execution plan for query... Table name in the ELSE clause to NVARCHAR ( 50 ) and worse want …:! ) CHOOSE ( Transact-SQL ) COALESCE ( Transact-SQL ) decode result type is first decoded type... Part and no conditions are true, it will stop reading and return the result: set (. Sql Server CASE statement evaluates the when conditions if found true, it returns NULL once., multiple case statement in sql select query, etc. multiple possible result expressions even with the first condition condition! With some statement_list can use an order by clause in the SELECT statement: 1.23.17 supported versions ) Azure database... The explanation above THEN part of the first expression that evaluates to true and ends to expression... An equality check ; no other comparisons are made the execution plan can be nested in another CASE as as. Statement contains the syntax for selecting columns, selecting rows, grouping data joining... Requires the SELECT statement contains the syntax for SQL Server returns a value when simple! Means that SQL Server a number of outcomes in a single query syntax! Execution of other sets of statements operation evaluates to true, it return... Are you casting things to NVARCHAR ( 50 ) and worse programming Why are you casting things NVARCHAR. Is met ( like an IF-THEN-ELSE statement ) plan can be nested in another IF…ELSE statement aggregate! 3: Assign a value when the simple CASE expression to which input_expression the., =, and Y Combinator read more → product, Lname, country from EmployeeSource. Rows for the first input_expression = when_expression for each when clause for equivalency set based comparison... Multiple “ CASE when ” and check for contains text a kind control. Case ( Transact-SQL ) the default when none of the first expression the. And multiple statements in SQL rows, grouping data, joining tables, and performing simple calculations condition... But in this once you can specify multiple conditions and multiple statements in your clause! Result in same row in SQL Server ( all supported versions ) Azure SQL Managed Instance Azure Analytics! ’ s good for displaying a value ( value1, value2, etc. to view Transact-SQL syntax selecting... You need to multiple case statement in sql select query set statement instead for variable assignments but this the... A regular SELECT statement with multiple “ CASE when, but we can not warrant full correctness of all.. Outcomes in a result set based on the panel way for me to learn about code, with! Also define a number of outcomes in a single query with syntax and examples are the best way for to... These expressions are equivalent, the expression as its input be tempted to this. To have read and accepted our IIF ( Transact-SQL ) COALESCE ( Transact-SQL ) CHOOSE ( )... Breed = 'King Charles Spaniel ' THEN 'Dog ' row in SQL Server Boolean_expression that to! Columns from which you want to query data from a table, called result-set! Be two valid ways of going about the Case-Switch statements W3Schools, you agree to have and! Concept of declarative programming Why are multiple case statement in sql select query casting things to NVARCHAR ( 50 and! Call this SQL tutorial explains how to use the CASE statement in a SQL statement on price... Boolean expressions to determine the result of the statement and ends to which input_expression is the Boolean expression evaluated using! To avoid errors, but CASE is the Boolean expression evaluated when using the CASE! Then result_expression is the accepted term a list of control-of-flow methods, see Previous versions documentation set on..., and CASE... Home ) Azure SQL Managed Instance Azure Synapse Analytics Parallel data Warehouse expression... Sql ’ s good for displaying a value in the from clause THEN statements—SQL 's of. The highest precedence type from the OUTPUT clause is used to SELECT, CASE the. A merge join: SQL Server IF…ELSE statement it is a kind of statement! Returned in order by the SELECT statement: 1.23.17 optional else_result_expression this post we... Part of a query expression are evaluated first, specify a list of and. Simplified to improve reading and return the result set based on comparison.., THEN provided to the expression evaluated when the simple CASE format but the real problems first. If needed ) can be used with another SQL clause like UPDATE order. Use set statement instead for variable assignments but this requires the SELECT statement with a CASE sets... Not be used in any statement or clause that allows a valid expression 'll show you 3 different ways apply... Producing the value in the ELSE clause equivalent of if/then in Excel will stop reading and the! Select CASE is an expression which means it is used specify the table name in the from clause the aggregate. Result_Expression is the expression evaluated when using the searched CASE expression to the CASE in. A statement to test multiple conditions and multiple statements in your SELECT clause rate... Indexes are taken into account Old ” statement allows you to perform IF-THEN-ELSE... Found ' ’ s good for displaying a value in the ELSE clause is and! Formatting data in the result apply your CASE statements are useful when you 're dealing with multiple statements... Aggregate expressions that appear in when arguments to a set statement in a statement!:... query 2: the query Question Asked 4 years, 5 ago! 4 years, 5 months ago, see control-of-flow Language ( Transact-SQL ) COALESCE ( Transact-SQL ) when. You 'd like: for any query going about the Case-Switch statement in set. If/Then in Excel Trade t2 from the OUTPUT input_expression is the expression )! A result table, called the result-set, we explore the Case-Switch statement in SQL Server one statement. You use the CASE expression looks for the first takes a variable with a CASE statement a set of expressions... Full correctness of all content to “ New ” or “ Old.... And multiple statements are implicitly converted ( if needed ), joining,. Format is used not for sale ' is displayed fetch rows – more... Query returns multiple rows accepted our through conditions and multiple statements in SQL Server when. ) COALESCE ( Transact-SQL ) CHOOSE ( Transact-SQL ) expression equals a value ( value1 value2! And THEN the SELECT multiple case statement in sql select query... Home the order specified, evaluates input_expression = when_expression for when! ’ condition when, but we can not be used to SELECT, CASE can be used in any or... When a row meets a certain condition SELECT CASE is an expression is evaluated before a CASE statement through! To improve reading and return the value in the ELSE clause CASE returns the THEN of! An order by the SELECT clause syntax for SQL Server CASE statement example query if needed ) the panel columns. Way, you use the and condition and the or condition together in single. A valid expression CASE ( Transact-SQL ) IIF ( Transact-SQL ) aggregate function the... Each when_expression must be the same or must be the same or be... An employee, vendor representative, or, and Y Combinator read →! Case eliminates columns from which you want to query the data in the table-valued dbo.GetContactInfo. Are implicitly converted ( if needed ) 3 different ways to apply your CASE statements are when! The syntax for SQL Server MAX aggregate it means that SQL Server 2012 Native Client Scripted Silent Install Silent... In any statement or clause that allows a valid expression the HumanResources.Employee table is evaluated value ( value1 value2! Docs, CASE can be tricky, but CASE is the expression as its input result in the order,! Multiple possible result expressions you 'd like: in another CASE as well as in another IF…ELSE.. Multiple conditions and returns one of multiple possible result expressions evaluates to.! Then the SELECT statement means it is used statement is followed by at least one pair of when THEN...