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Can I loop in MySQL?
Introduction to MySQL LOOP statement The LOOP statement allows you to execute one or more statements repeatedly. The LOOP can have optional labels at the beginning and end of the block. The LOOP executes the statement_list repeatedly.
How do you declare a statement?
Variables in SQL procedures are defined by using the DECLARE statement. Values can be assigned to variables using the SET statement or the SELECT INTO statement or as a default value when the variable is declared. Literals, expressions, the result of a query, and special register values can be assigned to variables.
When to use a loop statement in MySQL?
The MySQL LOOP statement could be used to run a block of code or set of statements, again and again, depends on the condition. labelname : It is an optional label at the start and end. statements : They could have one or multiple statements, each ended by a semicolon (;) and executed by LOOP.
How to terminate a loop in MySQL [ label ]?
Typically, you terminate the loop when a condition is satisfied by using the LEAVE statement. This is the typical syntax of the LOOP statement used with LEAVE statement: [label]: LOOP — terminate the loop IF condition THEN LEAVE [label]; END IF ;
When does iteration of loop happen in MySQL?
The iteration of loop happens every time when the condition is examined and the result depends on the code flow. But if the MySQL WHILE loop condition is FLASE when the expression evaluates between while and end while statements then it exits the loop. The elementary syntax for WHILE loop is represented as follows:
How does the LEAVE statement work in MySQL?
END LOOP ; The LEAVE statement immediately exits the loop. It works like the break statement in other programming languages like PHP, C/C++, and Java. In addition to the LEAVE statement, you can use the ITERATE statement to skip the current loop iteration and start a new iteration.