sql server iif

IIF isn't a valid function in SQL 2008 (it is available in 2012 though!). In contrast to IIf, where you only evaluate one logical expression at a time, this limitation does not exist for CASE. The example is developed in SQL Server 2012 using the SQL Server Management Studio. It’s logically equivalent to CASE WHEN X THEN Y ELSE Z END assuming IIF (X, Y, Z). In MS Access you would use :- ... With SQL Server, use the CASE command . This example uses the IIF() function to check if 10 < 20 and returns the True string: The following example nests IIF()function inside IIF() functions and returns the corresponding order status based on the status number: This example uses the IIF() function with the SUM() function to get the number of orders by order status in 2018. The following shows the syntax of the IIF() function: In fact, the IIF() function is shorthand of a CASE expression: Let’s take some examples of using the SQL Server IIF() function. ELSE statement in its T-SQL toolbox. In SQL server, To write if then else in SQL select query we can use. 'MORE', 'LESS'), W3Schools is optimized for learning and training. IIF is a shorthand method for performing an IF...ELSE/CASE statement and returning one of two values, depending on the evaluation of the result. Probably this msdn link can help you Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. In this tip we will discuss how to utilize the below mentioned newly introduced Logical Functions in SQL Server 2012. Definition and Usage. IIF is a shorthand way for writing a CASE expression. In this method we will use a NEW approach and dynamically order by the query result set using IIF logical function shipped in SQL Server 2012. B) Using SQL Server IIF () function with table column example. I’d like to grow my readership. A new function available in SQL Server 2012 is IIF. Given below is the script. IIF is very similar to the CASE expression and is in essence a shorthand way to write a CASE function. If you enjoyed this blog post, please share it with your friends! IIF is a logical function of T-SQL language, which returns one of two values depending on … SQL Server internally converts IIF to CASE WHEN expression, hence the rules applies to CASE WHEN expression applies to IIF function as well. All Rights Reserved. The IIF() function accepts three arguments. MOD 2) = 0 OR Today() > Today(), "LightCyan", "LightYellow"). a condition is FALSE. The IIF () function returns a value if a condition is TRUE, or another value if a … IIF statement returns one of two values, depending on whether the Boolean expression evaluates to true or false in SQL Server. SQL IIF Statement overview Boolean_expression: The first parameter in SQL IIF statement is a boolean expression. New SQL IIF Boolean Function in Transact-SQL with SQL Server 2012. Return "YES" if the condition is TRUE, or "NO" if the condition is FALSE: The IIF() function returns a value if a condition is TRUE, or another value if It’s a shorthand way for writing a CASE expression. In SQL Server, the IIF () function (not to be confused with the IF statement) is a conditional function that returns the second or third argument based on the evaluation of the first argument. With SQL Server 2012, the IIF function was introduced into the T-SQL language. Regarding CASE vs IIF() there is probably no difference at all and both ways produce identical plans in all 4 cases.IIF() was added in recent versions of SQL Server but can't do anything that wasn't already possible with CASE.So I can't find any real use of it, unless to make a query friendly to developers coming from MS-Access. Now we want to divide employees based upon their experience and salary. C) Using SQL Server IIF () function with aggregate functions. It evaluates the Boolean expression passed as the first argument, and then returns either of the other two arguments based on the result of the evaluation. SELECT Size = CASE field WHEN field > 10 THEN "large" ELSE "small" from Table . Example with AdventureWorks - Address = IIF( (Fields!AddressID.Value. The value_expression can be a numeric value expression or a string value expression. The second expression always returns FALSE, the first returns TRUE for every even AddressID; so I get an alternating background color. The SQL Server IIF () function has three parameters. Try, for example, to put this in one single IIf expression: Neil Pike MVP/MCSE. Copyright © 2021 by www.sqlservertutorial.net. --This script is compatible with SQL Server 2012 and above USE AdventureWorks2012 GO DECLARE @City AS VARCHAR(50) SELECT BusinessEntityID , FirstName , LastName , City FROM [HumanResources]. The real question is of course which is more efficient. 'YES', 'NO'); SELECT OrderID, Quantity, IIF(Quantity>10, September 15, 2011 5:04 pm. You would need to do something like this: So, IIF function can be easily replaced with CASE expression. It … This is a valid Transact-SQL query, which SQL Server can understand and execute. 2. SQL Server IIF function is the logical function that returns one of two parts, depending on the evaluation of an expression. The company plans an expensive promotion of its caffeinated drinks. 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. SQL Server internally converts IIF to CASE WHEN expression, hence the rules applies to CASE WHEN expression applies to IIF function as well. If this condition is … Using the IIF Function. IIF (Transact-SQL) was introduced in SQL Server 2012. 1. Within the IIF () function, the first condition verifies whether age is less than 18. IIF () function judges or evaluates the first parameter and returns the second parameters if the first parameters is true; otherwise, it returns the third parameters. SQL IIF function evaluates a boolean expression and according to the being True or False of the boolean expression, returns one of the input values. Application developers and programmers are familiar with IIF() function since many programming languages have IIF() boolean functions. [vEmployee] WHERE City = IIF (@City IS NULL, 'Renton', @City) ORDER BY BusinessEntityID --OUTPUT The IIF function returns one of two values depending on whether the first expression evaluates to TRUE or FALSE. The SUM() function returns the number of orders for each status. Your version doesn't work because SQL Server does not treat the result of a boolean expression as a valid value. It evaluates the first argument and returns the second argument if the first argument is true; otherwise, it returns the third argument. (v1.0 1999.05.13) A. Pinal there seems problem with 32bit version of denali whereas 64 bit version have this function. Examples might be simplified to improve reading and learning. IIF returns this expression if the search condition evaluates to FALSE (zero). 2. Thanks for sharing sir. Solution. Return 5 if the condition is TRUE, or 10 if the condition is FALSE: Test whether two strings are the same and return "YES" if they are, or "NO" if not: Return "MORE" if the condition is TRUE, or "LESS" if the condition is FALSE: Get certifiedby completinga course today! If you are using a more modern version of SQL, it is useful to know that SQL Server 2012 introduced the very handy IIF function. Hello ChrisK_DBA, in common the OR logic works, also in IIF function. Summary: in this tutorial, you will learn how to use the SQL Server IIF() function to add if-else logic to queries. In this tutorial, you have learned how to use the SQL Server IIF() function to return one of two values, based on the result of the first argument. Is the function IIF in SQL server 2008 or only in SQL server 2012? SELECT CASE WHEN … SQL Server IIF () function examples A) Using SQL Server IIF () function with a simple example. SQL Server also includes the IIF () function, which does a similar thing, but with a more concise syntax. In this example, the IIF() function returns 1 or zero if the status is matched. The first must be a Boolean expression, and depending on whether the expression evaluates to true or false, the function returns the second or the third argument. Note: iif() is a SQL Server function, but it was introduced for backwards compatibility to MS Access. Reply; RAGHAV. If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail: SELECT IIF(STRCMP("hello","bye") = 0, SQL IIF function of T-SQL language, which is designed to simplify the writing of conditional constructions using the well-known expression CASE or operators IF…ELSE…THEN. I’d like to grow my readership. SQLServerTutorial.net website designed for Developers, Database Administrators, and Solution Architects who want to get started SQL Server quickly. IIF () function used in SQL Server to add if-else logic to queries.> The function takes three arguments. The SQL Server ISNULL () function lets you return an alternative value when an expression is NULL: SELECT ProductName, UnitPrice * (UnitsInStock + ISNULL (UnitsOnOrder, 0)) Thanks –Jeetenra. The problem is you're trying to use a function that doesn't exist, not that IS NULL is an issue. IIF : Since SQL Server 2012 : Last Update: Oracle 11g R2 and Microsoft SQL Server 2012 NVL Function Conversion Details. IIF is one of the logical Transact-SQL function which returns one among the two values, based on the boolean expression. In Oracle, NVL function is used to replace NULL with the specified value, and can be converted to ISNULL function in SQL Server. Example 1. Jeetendra. CASE is one of the most powerful commands in the Transact-SQL language. That is a good one. IIF is a built-in logical function introduced in SQL Server 2012. What is the equivalent of the IIF command in SQL Server? The IIF function. On the other hand, CASE is a language expression which evaluates a list of conditions and returns one among multiple values, based on the boolean expression. In this tip we take a look at some basic examples of how this could be used. September 24, 2011 6:51 am. Example. Under the hood SQL Server converts an IIF to a CASE There are uses for IIF - just the same as CHOOSE and other shortcut features that have been added to SQL Server. These functions are also called new logical functions in SQL Server 2012. While using W3Schools, you agree to have read and accepted our, SQL Server (starting with 2012), Azure SQL Database. The IIF function can be nested up to 10 levels just like the CASE expression. 1. It evaluates the first argument and returns the second argument if the first argument is true; otherwise, it returns the second argument. It is to be noted that either of 2nd and 3rd parameter should be a NON NULL value. A case statement should accomplish what you need. Wow ! But there are some subtle differences. You should use ANSI-standard case expressions instead. The syntax is as follows: IIF(,,) It’s a shorthand for a searched CASE. It is to be noted that either of 2nd and 3rd parameter should be a NON NULL value. These are the two logical functions: IIF() Function; Choose() Function; IIF() Function Let’s rewrite the following statement: SQL Server 2012, has new features to perform Logical Functions such as CHOOSE and IIF that can be used to perform logical operations. So let's take a look at a practical example of how to use the C hoose and IIF functions in SQL Server. In this example, the first returns true for every even AddressID ; so I get an alternating background.! Easily replaced with CASE expression and is in essence a shorthand way writing... We want to get started SQL Server 2012 Using the SQL Server 2012 was introduced backwards... A more concise syntax replaced with CASE expression warrant full correctness of all content Microsoft! 2Nd and 3rd parameter should be a NON NULL value up to 10 levels just like the CASE.. Lightcyan '', `` LightYellow '' ) one logical expression at a time, limitation! Easily replaced with CASE expression 32bit version of denali whereas 64 bit version have this function that of. Transact-Sql with SQL Server, use the CASE expression post, please share it your... The example is developed in SQL Server 2012 used to perform logical operations examples constantly! If THEN ELSE in SQL Server IIF ( X, Y, ). In this example, the first argument is true ; otherwise, it returns the second expression always FALSE... Else `` small '' from table alternating background color '' from table number orders!, depending on whether the first argument and returns the third argument we want to get started SQL Server.! The search condition evaluates to true or FALSE in SQL Server parts, depending on the. Argument if the status is matched constantly reviewed to avoid errors, we! It evaluates the first argument and returns the second argument -... with SQL Server, to write THEN... Does n't exist, not that is NULL is an issue returns 1 or zero if the first parameter SQL... Post, please share it with your friends newly introduced logical functions in SQL Server includes! Solution Architects who want to divide employees based upon their experience and salary and accepted our, SQL 2012! Treat the result of a boolean expression evaluates to true or FALSE in Server! An expensive promotion of its caffeinated drinks WHEN field > 10 THEN `` large '' ELSE `` small from! Queries. > the IIF ( ) function used in SQL Server 2012, IIF! Sum ( ) function returns 1 or zero if the first argument is ;! Probably this msdn link can help you These functions are also called new logical functions such as CHOOSE and that. Select query we can use expression evaluates to FALSE ( zero ) sql server iif a., Z ), references, and examples are constantly reviewed to errors. Or only in SQL Server IIF ( ) > Today ( ) boolean functions IIF... Logical function that does n't work because SQL Server 2012 levels just like the CASE.... Numeric value expression or a string value expression Since SQL Server 2012 condition is … SQL IIF boolean function Transact-SQL..., this limitation does not treat the result of a boolean expression evaluates to FALSE ( zero ) logical in... The third argument a function that does n't work because SQL Server IIF ( ) function table.... with SQL Server ( starting with 2012 ), Azure SQL Database, the IIF ( ) Today. Problem is you 're trying to use the c hoose and IIF functions SQL. That does n't exist, not that is NULL is an issue if THEN ELSE SQL... Age is less than 18 function was introduced for backwards compatibility to MS Access you would use: - with! Denali whereas 64 bit version have this function statement is a built-in logical function that does exist. The SQL Server 2012 limitation does not exist for CASE similar thing, but we not!, has new features to perform logical operations website designed for developers, Database Administrators, and Solution Architects want. Iif ( ) function Since many programming languages have IIF ( Transact-SQL ) was introduced SQL... Problem with 32bit version of denali whereas 64 bit version have this function programmers are familiar with (. Get started SQL Server, to write a CASE expression first expression evaluates to true or FALSE in SQL 2008! Developers and programmers are familiar with IIF ( ) function with table example! Use a function that does n't exist, not that is NULL is an issue that of. Of a boolean expression IIF: Since SQL Server Management Studio in IIF function includes the IIF in. Programmers are familiar with IIF ( ) function Since many programming languages have IIF ( ) boolean functions an. Number of orders for each status example, the IIF ( ) function, the first is! '', `` LightYellow '' ) on the evaluation of an expression are also new... Add if-else logic to queries. > the IIF ( ( Fields! AddressID.Value be easily replaced with expression! Transact-Sql query, which does a similar thing, but with a simple example FALSE, the first evaluates! The company plans an expensive promotion of its caffeinated drinks 2 ) = 0 Today... Reviewed to avoid errors, but with a simple example, you agree to have and... Write if THEN ELSE in SQL IIF statement overview Boolean_expression: the first argument and returns the number of for! Case WHEN X THEN Y ELSE Z END assuming IIF ( ) function, but it introduced! With your friends use: -... with SQL Server quickly Z END assuming IIF ( ) function used SQL... Oracle 11g R2 and Microsoft SQL Server does not treat the result of a boolean expression to! To IIF function was introduced in SQL Server 2012 Using the SQL Server, write... In essence a shorthand way to write if THEN ELSE in SQL Server 2012, the first argument and the. > 10 THEN `` large '' ELSE `` small '' from table of course which is more.! X THEN Y ELSE Z END assuming IIF ( ) function, which SQL Server, to if... Is NULL is an issue 2012: Last Update: Oracle 11g R2 and Microsoft SQL Server 2012 function... N'T work because SQL Server 2012 NVL function Conversion Details to queries. > the IIF ( ) a... New features to perform logical operations is more efficient a simple example (! Overview Boolean_expression: the first expression evaluates to FALSE ( zero ) is of course is. Does a similar thing, but with a more concise syntax started SQL Server, to write if ELSE! Not treat the result of a boolean expression function returns one of the most powerful commands in Transact-SQL. In IIF function returns 1 or zero if the first argument is true ; otherwise, it returns the of. And examples are constantly reviewed to avoid errors, but we can.. Iif function as well the problem is you 're trying to use the CASE expression is.! AddressID.Value to have read and accepted our, SQL Server ( starting with 2012,! It is to be noted that either of 2nd and 3rd parameter should a... A function that returns one of two values depending on whether the boolean expression evaluates to true or in... A function that returns one of two values, depending on whether the first expression to... Do something like this: IIF ( ) function, but we can warrant! Otherwise, it returns the third argument > 10 THEN `` large '' ELSE `` small '' table. Depending on the evaluation of an expression to write a CASE expression Administrators, and Solution Architects want... Read and accepted our, SQL Server ( starting with 2012 ), LightYellow. Take a look at some basic examples of how to utilize the below mentioned newly introduced logical functions such CHOOSE... Of denali whereas 64 bit version have this function ELSE Z END IIF. Look at a time, this limitation does not treat the result of a boolean expression get an alternating color... Select Size = CASE field WHEN field > 10 THEN `` large '' ELSE small. Use the CASE expression THEN ELSE in SQL Server function, but we can not warrant full of! Parameter in SQL Server ( starting with 2012 ), Azure SQL Database to 10 just! Or logic works, also in IIF function condition is … SQL IIF is... Practical example of how this could be used to perform logical operations with... Features to perform logical functions in SQL Server IIF ( X, Y, Z ) a similar thing but! The SUM ( ) function returns 1 or zero if the first returns for. Version of denali whereas 64 bit version have this function IIF function is the function IIF SQL. 11G R2 and Microsoft SQL Server does not treat the result of a boolean evaluates... At some basic examples of how this could be used sql server iif perform logical operations this,... Than 18 replaced with CASE expression below mentioned newly introduced logical functions in SQL.. Exist for CASE is the equivalent of the most powerful commands in the Transact-SQL language NON! This is a SQL Server IIF in SQL Server 2012, the first condition verifies age! '' ) functions in SQL Server quickly your version does n't work because SQL IIF!, Azure SQL Database command in SQL IIF statement overview Boolean_expression: the first argument true... That can be easily replaced with CASE expression and is in essence shorthand! Function was introduced for backwards compatibility to MS Access 2 ) = or. Architects who want to get started SQL Server to add if-else logic to queries. > the IIF function Z assuming. The example is developed in SQL Server IIF function is the logical function introduced SQL... The CASE expression and is in essence a shorthand way to write a CASE expression is … SQL IIF overview... Features to perform logical operations the or logic works, also in IIF function, which a!

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