MyBatis 集合操作语法范例：配合SQL的in关键字

Java语法：

    private String[] tagIds;

 

MyBatis语法

  <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>