mysql中delete的表别名使用方法

时间:2023-03-09 18:33:58
mysql中delete的表别名使用方法

在 mapper.xml 中的 dynamicWhere 动态查询中使用了表别名,Delete 语句引用了动态查询,如下:

	<delete id="delete" parameterType="map">
    <![CDATA[
        delete from `physician` x
    ]]>
		<include refid="dynamicWhere"/>
    </delete>

当输入删除条件后,得到的删除语句类似如下:

delete from `physician` x WHERE x.id = 12345

但这样的语句存在语法问题:

Error : 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 'x WHERE x.id = 12345' at line 1

通过查询资料发现,mysql的delete的语法有些特殊,如下:

delete x from `physician` x WHERE x.id = 12345

通过比较之后可以看出,delete 语句在用别名的时候要在delete后边多写一个别名。

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