Mybatis动态Sql标签使用小结

select DISTINCT ksid as id,ksdm as cd , ksmc as na ,id_org ,1 as fg_active,kspydm as py FROM
        V_CIS_RO_USER
        WHERE 1=1
        <if test="orgId != null">
            AND id_org = #{orgId}
        </if>
        <if test="userId != null">
            AND YHID = #{userId}
        </if>
        <if test="id != null">
            AND ksid = #{id}
        </if>
        <if test="search != null and  search != '' ">
            and  kspydm LIKE concat('%', concat(#{search}, '%'))
        </if>
        ORDER BY kspydm

<select id="getAdjRatios" resultType="com.fp.epower.model.dto.PowerPredictAdjDto">
        <if test="unitType == null">
            SELECT a.*,b.date,b.status FROM power_forecast_adjust_data a
            LEFT JOIN power_forecast_adjust_info b
            ON a.info_id = b.id
        </if>
        <if test="unitType != null and unitType == 1">
            SELECT a.*,b.date,b.status,c.dispatch_name unitName FROM power_forecast_adjust_data a
            LEFT JOIN power_forecast_adjust_info b
            ON a.info_id = b.id
            LEFT JOIN gen_set c
            ON a.unit_id = c.id
        </if>
        <if test="unitType != null and unitType == 2">
            SELECT a.*,b.date,b.status,c.abbreviation unitName FROM power_forecast_adjust_data a
            LEFT JOIN power_forecast_adjust_info b
            ON a.info_id = b.id
            LEFT JOIN dic_power_plant_info c
            ON a.unit_id = c.id
        </if>
        <where>
            <if test="status != null">
                b.status = #{status}
            </if>
            <if test="unitType != null and unitType != 0">
                AND a.unit_type = #{unitType}
            </if>
            <if test="date != null">
                AND b.date = #{date}
            </if>
        </where>
    </select>

<select id="getAdjRatio" resultType="java.lang.String">
        SELECT ratio FROM power_forecast_adjust_data a
        LEFT JOIN power_forecast_adjust_info b
        ON a.info_id = b.id
        <choose>
            <when test="status != null and status != 0">
                b.`status` = #{status}
            </when>
            <when test="unitType != null and unitType != 0">
                AND a.unit_type = #{unitType}
            </when>
            <when test="unitId != null and unitId != ''">
                AND a.unit_id = #{unitId}
            </when>
            <when test="date != null">
                AND b.date = #{date}
            </when>
            <otherwise>
                b.`status` = 1
            </otherwise>
        </choose>
    </select>

<select id="selectUsers" resultType="com.example.User">
  SELECT *
  FROM user
  <trim prefix="WHERE" prefixOverrides="AND | OR ">
    <if test="name != null">
      AND name = #{name}
    </if>
    <if test="age != null">
      AND age = #{age}
    </if>
    <if test="gender != null">
      AND gender = #{gender}
    </if>
  </trim>
</select>

SELECT * FROM user WHERE name = #{name} AND age = #{age}

<select id="getAdjRatio" resultType="java.lang.String">
        SELECT ratio FROM power_forecast_adjust_data a
        LEFT JOIN power_forecast_adjust_info b
        ON a.info_id = b.id
        <where>
            id IN 
            <foreach collection="ids" item="id" open="(" close=")" separator=",">
                #{id}
            </foreach>
        </where>
</select>