如何在用PHP编写的SQL查询中正确指定WHERE子句？

Question

$query = "INSERT INTO directory_level_one (child_categories)
    VALUES 
        ('$category_name')
    WHERE
        category = '$parent'";

currently, I get the following error when I add the WHERE part in the above sql query.

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 'WHERE category = 'Philosophy'' at line 4

Answer 1

INSERT statements don't have a WHERE clause.

Perhaps you want an UPDATE statement instead?

UPDATE directory_level_one
SET child_categories = 'your_category_name'
WHERE category = 'your_parent'

Answer 2

You can't have a where clause for an Insert statement. Are you trying to update existing database records instead? In that case, use the Update statement.

Answer 3

您不能在插入语句中使用where子句。

Answer 4

where clause can not be used in INSERT statment

please read this before preceding further http://dev.mysql.com/doc/refman/5.5/en/insert.html

Answer 5

您要做的是：

$query = "UPDATE directory_level_one SET child_categories='$category_name' WHERE category = '$parent'";

Answer 6

我认为您可能想将INSERT更改为UPDATE