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15 wrz 2008 · From this link, we can understand IF THEN ELSE in T-SQL: IF EXISTS(SELECT * FROM Northwind.dbo.Customers WHERE CustomerId = 'ALFKI') PRINT 'Need to update Customer Record ALFKI' ELSE PRINT 'Need to add Customer Record ALFKI' IF EXISTS(SELECT * FROM Northwind.dbo.Customers WHERE CustomerId = 'LARSE') PRINT 'Need to update Customer Record LARSE ...
2 mar 2017 · If you are checking conditions against multiple variables then you would have to go for multiple IF Statements, Each block of code will be executed independently from other blocks. IF(@Var1 Condition1) BEGIN /*Your Code Goes here*/ END IF(@Var2 Condition1) BEGIN /*Your Code Goes here*/ END IF(@Var3 Condition1) BEGIN /*Your Code Goes here*/ END
28 maj 2024 · In this article, we explored different options for executing IF-THEN logic in a SQL SELECT statement. These options include using CASE , IIF() , and CHOOSE() . Furthermore, if we want a query that’s used in almost every dialect, we must choose the CASE statement.
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 lip 2023 · Here are some advanced examples showcasing the usage of IF-THEN statements in SQL Server, along with common pitfalls to avoid and best practices to follow. Example 1: Nested IF-THEN Statements. You can nest IF-THEN statements to handle multiple conditions and execute specific code blocks accordingly.
26 wrz 2023 · Step 1: Basic Syntax. The IF...THEN statement in SQL is often used in conjunction with the CASE expression. The basic syntax goes like this: SELECT . column1, column2, ... CASE WHEN condition1 THEN result1. WHEN condition2 THEN result2. ... ELSE else_result. END AS alias_name. FROM . your_table; column1, column2, etc.:
30 paź 2023 · In this example, the WHERE clause is structured with OR/AND operators as an SQL if statement in SELECT to define conditions either based solely on age or a combination of age and department, demonstrating the versatility of conditional logic in SQL queries.
