php - PHP MYSQL DELETE FROM WHERE AND 子句

Question

试图让以下工作，但对于我的生活，我无法让这个工作。

有人可以帮忙吗？

DELETE FROM 'content' WHERE note_id = '7' AND WHERE userid = '1'
DELETE FROM 'note' WHERE id = '7' AND WHERE userid = '1'

我需要从每个表中删除一条记录，在该表中检查用户实际上是那个用户，但是当我运行查询时出现语法错误

当我删除第二个 WHERE 时，我收到以下信息。

SQL 错误 (1064)：您的 SQL 语法有错误；检查与您的 MySQL 服务器版本相对应的手册，note在第 2 行的 'DELETE FROM WHERE id ='7' AND userid = '1"附近找到正确的语法给用户

抱歉，我在脚本到达这里之前添加了一个额外的空间

score 8 · Accepted Answer

只WHERE需要1个，试试这个：

DELETE FROM content WHERE note_id = '7' AND userid = '1'
DELETE FROM note WHERE id = '7' AND userid = '1'

score 7 · Accepted Answer

您不能在表名周围使用单引号：

DELETE FROM `content` WHERE note_id = '7' AND userid = '1'

您必须在表名和列名周围使用反引号 - 而不是单引号。

另外：你有两个where在那里 - 只是and在额外的子句之间使用。

score 3 · Accepted Answer

您WHERE在单个查询中添加了多个子句，这将不起作用。

试试这个：

DELETE FROM content WHERE note_id = '7' AND userid = '1'

DELETE FROM note WHERE id = '7' AND userid = '1'

score 1 · Accepted Answer

采用

DELETE FROM 'content' WHERE note_id = '7' AND userid = '1'
DELETE FROM 'note' WHERE id = '7' AND userid = '1'

score 0 · Accepted Answer

 DELETE FROM content WHERE note_id = '7' AND userid = '1'
 DELETE FROM note WHERE id = '7' AND userid = '1'

试试这个有两个错误，'表和where子句写了两次

5 回答 5