MyBatis动态sql语句归纳

1.删除数据(假删除)并修改时间

<!--根据id删除学生信息（多条）-->
<update id="updateStuStatus" parameterType="map">
    UPDATE student_t
    SET status = 0, modifiy_time = #{modifiyTime,jdbcType=TIMESTAMP}
    WHERE _id in(
      <foreach collection="list" item="id" separator=",">
        #{id, jdbcType=INTEGER}
      </foreach>
    )
</update>

传入的数据：

//Service
Map<String,Object> map = new HashMap<String,Object>();
map.put("list",list);
map.put("modifiyTime",date);
int result = studentInfoEntityMapper.updateStuStatus(map);

2.根据学生id查找学生图片

<!--查询学生图片-->
<select id="selectByStuList" resultMap="BaseResultMap">
    SELECT  img_src
    FROM img_t
    WHERE
    stu_id IN
    <foreach collection="list" item="item" open="(" separator="," close=")">
      #{item.id,jdbcType=INTEGER}
    </foreach>
    and status = 1
    ORDER BY create_time DESC
</select>

<!--传入的数据，dao层-->
List<ImgInfoEntity> selectByStuList(List<StudentInfoEntity> list);

3.根据教师id查找学生信息，或者根据学生名字查找学生信息

<!--根據教師id，查询學生信息。或者，根據學生姓名，查詢學生信息-->
<select id="selectStuAllByTeaId" parameterType="map" resultMap="BaseResultMap">
    SELECT <include refid="Base_Column_List"/>
    FROM student_t
    <where>
    <if test="list != null">
      AND tea_id IN
      <foreach collection="list" item="item" open="(" separator="," close=")">
        #{item.id}
      </foreach>
    </if>
    <if test="name != null">
      AND name LIKE  '%${name}%'
    </if>
    AND status = 1
    </where>
    ORDER BY create_time DESC
</select>

<!--方式二：-->
<select id="selectStuAllByTeaId" parameterType="java.util.Map" resultMap="BaseResultMap">
    select
    <include refid="Base_Column_List" />
    from student_t
    <where>
      <if test="_parameter.containsKey('list')">
        AND tea_id IN
        <foreach collection="list" item="item" open="(" separator="," close=")">
          #{item.id}
        </foreach>
      </if>
      <if test="_parameter.containsKey('name')">
        AND name LIKE '%${name}%'
      </if>
    </where>
    order by create_time DESC
</select>