创建 mysql 触发器时出现 1064 错误

Question

我正在尝试创建 mysql 触发器但出现错误

Error #1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 14

这是我的 sql 脚本

delimiter $$
CREATE TRIGGER `update_account_balance_after_transfer` AFTER INSERT ON `balance_transfer`
 FOR EACH ROW  
    BEGIN
    IF(NEW.from_account_type='CUSTOMER') THEN
        UPDATE customer c SET c.balance = c.balance-NEW.amount WHERE c.customer_id= NEW.from_account_id;
    ELSE IF(NEW.from_account_type='Vendor') THEN
        UPDATE vendor V SET v.balance = v.balance-NEW.amount WHERE v.vendor= NEW.from_account_id;
    END IF;
    IF(NEW.to_account_type='VENDOR') THEN
        UPDATE customer c SET c.balance = c.balance+NEW.amount WHERE c.customer_id= NEW.to_account_id;
    ELSE IF(NEW.to_account_type='Vendor') THEN
        UPDATE vendor V SET v.balance = v.balance+NEW.amount WHERE v.vendor= NEW.to_account_id;
    END IF;
END $$
delimiter ;

Answer 1

删除 ELSE 和 IF 之间的 space。它应该是 ELSEIF 如下所示。

delimiter $$
CREATE TRIGGER `update_account_balance_after_transfer` AFTER INSERT ON `balance_transfer`
 FOR EACH ROW  
    BEGIN
    IF(NEW.from_account_type='CUSTOMER') THEN
        UPDATE customer c SET c.balance = c.balance-NEW.amount WHERE c.customer_id= NEW.from_account_id;
    ELSEIF(NEW.from_account_type='Vendor') THEN
        UPDATE vendor V SET v.balance = v.balance-NEW.amount WHERE v.vendor= NEW.from_account_id;
    END IF;
    IF(NEW.to_account_type='VENDOR') THEN
        UPDATE customer c SET c.balance = c.balance+NEW.amount WHERE c.customer_id= NEW.to_account_id;
    ELSEIF(NEW.to_account_type='Vendor') THEN
        UPDATE vendor V SET v.balance = v.balance+NEW.amount WHERE v.vendor= NEW.to_account_id;
    END IF;
END $$
delimiter ;

MySQL IF 语法

查看演示here

创建 mysql 触发器时出现 1064 错误

Getting 1064 error while creating mysql trigger

mysql

sql

database

triggers

mysql-error-1064