The IF ELSE statement controls the flow of execution in SQL Server. It can be used in stored-procedures, functions, triggers, etc. to execute the SQL statements based on the specified conditions. Syntax: Copy IF Boolean_expression { sql_statement | statement_block } [ ELSE { sql_statement...
Therefore, optionally you can use the ELSE condition within the IF…ELSE statement. You should not use an ELSE IF condition in the IF ELSE statement. But, you can use nested (multiple) IF ELSE statements to obtain your results. Let’s have a quick example to learn the IF ELSE statements...
There is no "insert if not exist" in SQL 2016. There's insert ... where not exists ().Don't get the two confused with this article.Anonymous November 03, 2015 What is the difference between "insert if not exist" and MERGE statement Simplicity? What would be the MERGE ...
IF...THEN...ELSIF...ELSE statements provide the means for checking many alternatives in one statement. Formally, this statement is equivalent to nested IF...THEN...ELSE...IF...THEN statements, but only one END IF is needed. The following example uses an IF...THEN...ELSIF...ELSE stat...
statement. Basically "IF EXISTS" returns true if the query return 1 or more rows, so in you ...
IF THEN in SQL SELECT Statement I recently came across the CASE WHEN statement work Similar to IF statement into SQL SELECT , Maybe you’ll find it useful. Create table called Student using SQL Query: CREATE TABLE [dbo].[Student]( [StudentID] [int] NULL, [Marks] [float] NULL ) Inse...
This SQL Server tutorial explains how to use the IF...ELSE statement in SQL Server (Transact-SQL) with syntax and examples. In SQL Server, the IF...ELSE statement is used to execute code when a condition is TRUE, or execute different code if the conditio
{ sql_statement | statement_block } 使用语句块定义的任何 Transact-SQL 语句或语句分组。 除非使用了语句块,IF否则或ELSE条件只能影响一个 Transact-SQL 语句的性能。 若要定义语句块,请使用流控制关键字BEGIN和END。 注解 IF...ELSE可以在批处理、存储过程和即席查询中使用构造。 在存储过程中使用此构造时,通...
DIE is added on columns and constraints in ALTER TABLE statement ALTER TABLE DROP COLUMN IF EXISTS ALTER TABLE DROP CONSTRAINT IF EXISTS Documentation is already published on MSDN: DROP TABLE (Transact-SQL),DROP PROCEDURE (Transact-SQL),DROP TRIGGER (Transact-SQL),ALTER TABLE (Transact-...
RAISE NOTICE 'Student with the specified id does not exist in the student_info table'; END IF; END $$ Since the student having id 3 is a 19-year-old male, so, the ELSIF statement that satisfies the given condition retrieves a notice “Adult Male”. ...