Mysql 动态sql foreach 使用案例

<delete id="deleteUser" parameterType="list">

delete from user where id in

<foreach collection="list" item="id" open="(" separator="," close=")">

#{id}

</foreach>

</delete>

<select id="findUserBySex" resultType="user">

select * from user where name in

<foreach collection="roleNoList" item="name" index="index" open="(" separator="," close="）">

#{roleNo}

</foreach>

</select>

<insert id="addUser" parameterType="user" >

insert into user(name,id,code) values

<foreach collection="list" item="item" separator=",">

(#{item.name},#{item.id},#{item.code})

</foreach>

</insert>

<update id="updateUser" parameterType="user">

update user set a = #{fptm},b=#{csof} where c in

<foreach collection="list" item="item" open="(" separator="," close=")">

#{item}

</foreach>

</update>

我给你举个递归查询嵌套的例子，你看一下就明白了。

select yr_student_info.name from yr_student_info where yr_student_info.school_id in (select yr_school_info.id from yr_school_info where yr_school_info.province='上海' and yr_school_info.city='上海')

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