Question

我需要在MySQL中声明变量。这就是我现在所拥有的。

CREATE TRIGGER upd
BEFORE UPDATE ON chats FOR EACH ROW
BEGIN
    DECLARE my_cursor CURSOR FOR SELECT name FROM messages;
END

逻辑上，它接缝好了。但是有一个奇怪的错误即

SQL查询：

CREATE TRIGGER upd
    BEFORE UPDATE ON chats FOR EACH ROW
    BEGIN
        DECLARE my_cursor CURSOR FOR SELECT name FROM messages;

MySQL说：

#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 4

Answer 1

这很有效。当它被关闭时很乐意删除它。

它只是没有分隔符包装块。

drop trigger if exists upd;

delimiter $$
CREATE TRIGGER upd
BEFORE UPDATE ON chats FOR EACH ROW
BEGIN
    DECLARE vapenid INT;
END;
$$
delimiter ;

MySQL＃1064：声明一个变量

1 个答案: