Mysql触发器: Tried other suggestions but still get Error #1064

Question

我一直在这里查看其他 stackoverflow 问题，但似乎找不到我的错。我认为它与语法错误有关。我哪里错了？

DELIMITER $$
DROP TRIGGER IF EXISTS keisan
CREATE TRIGGER keisan AFTER INSERT ON profitdb
FOR EACH ROW
BEGIN
DECLARE shinAgentPercent;
SET @shinAgentPercent:=`AgentRisk`-`SubAgentRisk`;
SET NEW.`SubAgentProfit` = `Profit`*(`SubAgentRisk`/100);
SET NEW.`AgentProfit` = `Profit`*(@shinAgentPercent/100);
END;
$$

Answer 1

首先，您需要在 drop ... 命令之后有一个结束语句指示。

DROP TRIGGER IF EXISTS keisan $$

其次，我建议您使用 BEFORE INSERT 触发器来设置表的其他列的表达式值。

示例:

DELIMITER $$

DROP TRIGGER IF EXISTS keisan $$

CREATE TRIGGER keisan BEFORE INSERT ON profitdb
FOR EACH ROW BEGIN
    SET @shinAgentPercent  := NEW.AgentRisk - NEW.SubAgentRisk;

    SET NEW.SubAgentProfit := NEW.Profit * ( NEW.SubAgentRisk  / 100 );
    SET NEW.AgentProfit    := NEW.Profit * ( @shinAgentPercent / 100 );
END;

$$

-- now reset the delimiter to defaut
DELIMITER ;