If no expression evaluates to TRUE, the commands in the ELSE branch will execute. MySQL IF statement examples Let’s take a look at an example of how to use MySQL IF statements. DELIMITER $$ CREATE PROCEDURE GetCustomerLevel( in p_customerNumber int(11), out p_customerLevel varchar(10))...
1. Basic IF Usage sqlSELECTIF(1>0,'Yes','No')ASresult; In this example, the condition `1 > 0` is true, so the expression returns `'Yes'`. 2. Using IF with Table Data sqlSELECTemployee_id,IF(salary>5000,'High','Low')ASsalary_levelFROMemployees; ...
Each statement_list consists of one or more SQL statements; an empty statement_list is not permitted. An IF ... END IF block, like all other flow-control blocks used within stored programs, must be terminated with a semicolon, as shown in this example: ...
Each statement_list consists of one or more SQL statements; an empty statement_list is not permitted. An IF ... END IF block, like all other flow-control blocks used within stored programs, must be terminated with a semicolon, as shown in this example: ...
MySQL IF statement examples# The following example illustrates how to use the IF-ESLEIF-ELSE statement. The GetCustomerLevel() stored procedure accepts two parameters customer number and customer level. First, it gets the credit limit from the customers table. Then, based on the credit limit, ...
1.IF语句不生效 原因:可能是由于DELIMITER设置不正确,导致存储过程或函数的语法错误。 解决方法:确保在创建存储过程或函数之前正确设置DELIMITER,并在完成后恢复默认分隔符。 代码语言:txt 复制 DELIMITER // CREATE PROCEDURE example_procedure() BEGIN IF 1 = 1 THEN SELECT 'Condition is true'; ELSE SELECT '...
A simple IF function example You can use the IF function directly in theSELECT statementwithout theFROMand other clauses as follows: SELECT IF(1 = 2,'true','false'); -- false SELECT IF(1 = 1,' true','false'); -- true Displaying N/A instead of NULL using MySQL IF function ...
SET value = 'Yes' WHERE (report_id = report_id AND value = 'Yes') AND id = 1 OR id = 2; UPDATE table SET value = IF(value = 'Yes' AND report_id LIKE report_id AND id = 1, 'Yes', '') WHERE id = 2; Example Table:...
1)IF语句在存储过程或函数中表明了基础的条件选择语句 2)IF语句中如果search_condition满足true/1的条件,则执行对应的statement_list,否则再判断elseif中的search_condition是否满足true/1的条件,如果都不满足则执行else中的statement_list语句 3)Statement_list中可以包含一个或多个SQL语句 01 02 03 04 05 06 07...
IF 表达式1 THEN 操作1[ELSEIF 表达式2 THEN 操作2]……[ELSE 操作N]END IF 3.2分支结构之CASE CASE 语句的语法结构1: #情况一:类似于switchCASE 表达式WHEN 值1 THEN 结果1或语句1(如果是语句,需要加分号)WHEN 值2 THEN 结果2或语句2(如果是语句,需要加分号)...ELSE 结果n或语句n(如果是语句,需要加...