Question

我一直在围绕这个我正在尝试制作的SQL语句，我已经到了墙上可以这么说，如果你能提出任何建议，我做错了什么会有很大的帮助。我在第二个where语句周围得到了错误，但我真的不希望代码的最后一部分能够正常工作。

CREATE TRIGGER UpdateScores
AFTER INSERT ON CharSheet FOR EACH ROW
begin
       DECLARE id_exists Boolean;
              SELECT
              1
       INTO
              @id_exists
       FROM
              ScoresTable
       WHERE
              ScoresTable.PlayerID= NEW.PlayerID;

       IF @id_exists = 1
       THEN
           UPDATE
                  ScoresTable
           SET 
                  Exp = :New.Exp;
           WHERE 
                  ScoresTable.PlayerID = :NEW.PlayerID;
        END IF;

        IF @id_exists = 0
        THEN
         -- I don't expect this part to work yet.
          INSERT INTO ScoresTable VALUES (:New.PlayerID, :New.Race, :New.Class, :New.Exp);
        END IF;
END;
$$

Answer 1

问题在于这段代码：

   THEN
       UPDATE
              ScoresTable
       SET 
              Exp = :New.Exp;
       WHERE 
              ScoresTable.PlayerID = :NEW.PlayerID;
    END IF;

删除set语句末尾的分号。

MYSQL触发器插入或更新不同的表

1 个答案: