Jan 22, 2009 Re: How to write IIF() in INSERT INTO statement As for Banana's comments, the ppint of this post is to create a SQL string in VBA and as such anything outside the actual SQL string, such" & & " is VBA code and only the results of the call are sent in the SQL Use IIf in a query The IIf function is frequently used to create calculated fields in queries.
The syntax is the same, with the exception that in a query, you must preface the expression with a field alias and a colon (: ) instead of an equal sign (). The SQL IIF function is the new builtin Logical function introduced in SQL Server 2012. We can consider the IIF() as the shorthand way of writing IF Else, and CASE statements.
This function will accept three arguments, first argument is the Boolean expression (which return true or false). IIF() is one of the new builtin logical function introduced as a Part of Sql Server 2012. IIF() is the shorthand way of writing CASE statement or IFELSE statement. Infact if we see the execution plan the IIF() function internally translates to a CASE statement. IIF is a shorthand method for performing an IFELSECASE statement and returning one of two values, depending on the evaluation of the result.
Restructuring our above example to use IIF is quite simple. Question: What is Alternative to CASE Statement in SQL Server? Answer: IIF Function. Honestly, when I write this blog post I feel a bit sad that IIF Function has not received necessary adoption since its release in the year 2012. Mar 29, 2009 I am trying to write an IIF UDF in sql server 2008 and I am stuck on how to pass an expression to UDF. for example: IIF(studentid 1000, " studentid"" ssd" ) I cannot figure out the correct datatype for the UDF for the expression" studentid1000".
The function IIF returns one of 2 values depends of the evaluation of an expression. This is not a standard SQL function and exist for compatible with MS Access. SQL Syntax: IIF( expression, truevalue1, falsevalue) Parameters: expression Any Boolean expression.
truevalue. The return value if the expression is TRUE. The fact that IIF is translated into CASE also has an impact on other aspects of the behavior of this function. Since CASE expressions can be nested only up to the level of 10, IIF statements can also be nested only up to the maximum level of 10. Access to SQL; Whats New! Nested IIF Statement. Before I go into detail on what a Nested IIF Statement a quick overview of an IIF statement is in order. What is an IIF Statement.
First of all an explanation of a simple IIF statement. An IIF statement consists of the following: