private String[] tagIds;

  <delete id="deleteByIds" parameterType="java.util.List" >

    delete from BIZ_USER_TAG_REL

    where ID in

    <foreach item="item" index="index" collection="list"

    open="(" separator="," close=")">

      #{item}

    </foreach>

  </delete>

  <delete id="deleteByUserIdAndTagIds" parameterType="com.yuanchuangyun.framework.entity.system.UserTagRel" >

    delete from BIZ_USER_TAG_REL

    where USER_ID = #{userId} AND TAG_ID in

    <foreach item="item" index="index" collection="tagIds"

    open="(" separator="," close=")">

      #{item}

    </foreach>

  </delete>