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15 wrz 2008 · If you need to write just one condition, then iif() is sufficient, however if you want to write multiple iif() conditions within one statement then you will have to use `case' statement as demonstrated in above responses. Here is an example for your reference.
12 wrz 2019 · TRY_PARSE isn't a built in function. Also tried a few variations of: SELECT SUBSTRING(Text, 46, 4) AS Year, CASE WHEN CAST(SUBSTRING(Text, 46, 4) AS INT) IS NULL THEN 'Error'. WHEN CAST(Year AS INT) IS NULL < YEAR(GETDATE()) THEN 'In the past'. ELSE 'In the future'. END TEXT.
28 maj 2024 · We can use either a CASE statement or an IIF() function to implement IF-THEN logic in SQL. In this tutorial, we’ll explore how to implement IF-THEN logic in SQL across various dialects such as SQL Server, MySQL, and PostgreSQL.
3 wrz 2024 · Syntax. IF boolean_expression { sql_statement | statement_block } [ ELSE { sql_statement | statement_block } ] Arguments. boolean_expression. An expression that returns TRUE or FALSE. If the Boolean expression contains a SELECT statement, the SELECT statement must be enclosed in parentheses. { sql_statement | statement_block }
Let’s take some examples of using the SQL Server IIF() function. A) Using SQL Server IIF() function with a simple example. This example uses the IIF() function to check if 10 < 20 and returns the True string: SELECT IIF (10 < 20, 'True', 'False') Result; Code language: SQL (Structured Query Language) (sql) Here is the result:
Summary. Use IF...THEN statement to conditionally execute a block of statements based on the evaluation of a specified condition. Use IF...THEN...ELSE statement to execute a block of statements if a specified condition is true and an alternative block of statements if the condition is false.
You can take advantage of various functions inside the CATCH block to get detailed information about an error. These functions include the following: ERROR_MESSAGE() - you can take advantage of this function to get the complete error message. ERROR_LINE() - this function can be used to get the line number on which the error occurred.
