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3 wrz 2024 · The Transact-SQL statement that follows an IF keyword and its condition is executed if the condition is satisfied: the Boolean expression returns TRUE. The optional ELSE keyword introduces another Transact-SQL statement that is executed when the IF condition isn't satisfied: the Boolean expression returns FALSE. Transact-SQL syntax conventions.
30 lis 2019 · Instrukcję IF THEN ELSE w SQL Server możemy używać w T-SQL m. in. w blokach anonimowych, procedurach, funkcjach, triggerach. Składnia T-SQL If Then Else wygląda następująco: --tomaszkenig.pl. IF Boolean_expression_1. {...polecenie wykonywane, gdy warunek_1 jest spełniony - ma wartość TRUE...} [ ELSE IF Boolean_expression_2 .
15 wrz 2008 · The CASE statement is the closest to IF in SQL and is supported on all versions of SQL Server. SELECT CAST ( CASE WHEN Obsolete = 'N' or InStock = 'Y' THEN 1 ELSE 0 END AS bit) as Saleable, * FROM Product. You only need to use the CAST operator if you want the result as a Boolean value. If you are happy with an int, this works:
The IF...ELSE statement is a control-flow statement that allows you to execute or skip a statement block based on a specified condition. The IF statement. The following illustrates the syntax of the IF statement: IF boolean_expression . BEGIN . { statement_block } END Code language: SQL (Structured Query Language) (sql)
21 maj 2024 · The optional ELSE keyword is an alternate Transact-SQL statement that is executed when boolean_expression evaluates to FALSE or NULL. Transact-SQL syntax conventions. Syntax IF boolean_expression { sql_statement | statement_block } [ ELSE { sql_statement | statement_block } ] Arguments boolean_expression. An expression that returns TRUE or FALSE.
12 wrz 2022 · Like many other programming languages, T-SQL can pair the IF keyword with ELSE IF and ELSE to more easily check multiple mutually exclusive scenarios. When combined, the first statement must be a single IF statement.
28 maj 2024 · The CASE statement acts as a logical IF-THEN-ELSE conditional statement. We can use it to perform conditional branching within the SELECT statement across various SQL databases , including SQL Server, MySQL, and PostgreSQL .
