Mybatis基于Oracle数据库实现批量插入的几种方式

1：MySQL

首先我们说如何基于MySQL实现批量插入：

    <insert id="insertBatch">
        INSERT INTO LY_TEST (id, name, age )
        VALUES
        <foreach collection ="list" item="user" separator ="," close = ";">
            (#{user.id}, #{user.name}, #{user.age})
        </foreach>
    </insert>

2：Oracle

2.1：第一种

    <insert id="insertBatch">
        INSERT ALL
        <foreach collection="list" item="user" separator=" "
                 close="SELECT * FROM dual" index="index">
            INTO LY_TEST (id, name, age)
            VALUES (#{user.id}, #{user.name}, #{user.age})
        </foreach>
    </insert>

2.2：第二种

    <insert id="insertBatch">
        INSERT INTO LY_TEST (id, name, age )
        <foreach collection ="list" item="user" index="index" separator ="union all">
            (SELECT #{user.id,jdbcType=INTEGER},
             #{user.name,jdbcType=VARCHAR},
             #{user.age,jdbcType=INTEGER}
            from dual)
        </foreach>
    </insert>

2.3：第三种

    <insert id="insertBatch" parameterType="list">
        <foreach collection ="list" item="user" separator =";" open="begin" close = ";end;">
            INSERT INTO LY_TEST (id, name, age ) VALUES (#{user.id}, #{user.name}, #{user.age})
        </foreach>
    </insert>

补充：

批量删除：

     <delete id="xxx" parameterType="list">
        delete from LY_TEST
        where id in
        <foreach collection="list" item="item" open="(" close=")" separator=",">
            #{item}
        </foreach>
     </delete>