映射表链接查询技巧

通过 inner join 或者 where exists 来确保 主表的列满足一个条件

 SELECT
    t.id,
    t.org_url,
    t.internal_url,
    t.publish_time,
    t.app_code,
    t.create_by,
    t.create_time,
    t.update_by,
    t.update_time
    FROM
    url_convert_record t
    <if test="keywordIds!=null and keywordIds.size()>0">
        inner JOIN (
        select
        distinct record_id
        from url_convert_record_keyword
        where
        keyword_id in
        <foreach collection="keywordIds" index="index" item="keywordId" open="(" separator="," close=")">
            #{keywordId}
        </foreach>
        and is_valid = 1
        )f ON f.record_id = t.id
    </if>
    <where>
        <if test="startPublishTime!=null">
            and t.publish_time >= #{startPublishTime}
        </if>
        <if test="endPublishTime!=null">
            AND t.publish_time &lt; #{endPublishTime}
        </if>
        <if test="appCode!=null">
            AND t.app_code = #{appCode}
        </if>
    </where>
    ORDER BY t.update_time desc
</select>

或者

SELECT
t.id,
t.org_url,
t.internal_url,
t.publish_time,
t.app_code,
t.create_by,
t.create_time,
t.update_by,
t.update_time
FROM
url_convert_record t
<where>
    <if test="startPublishTime!=null">
        and t.publish_time >= #{startPublishTime}
    </if>
    <if test="endPublishTime!=null">
        AND t.publish_time &lt; #{endPublishTime}
    </if>
    <if test="appCode!=null">
        AND t.app_code = #{appCode}
    </if>
    <if test="keywordIds!=null and keywordIds.size()>0">
        AND EXISTS (
            SELECT
            1
            FROM
            url_convert_record_keyword
            WHERE
            keyword_id in
            <foreach collection="keywordIds" index="index" item="keywordId" open="(" separator="," close=")">
                #{keywordId}
            </foreach>
            AND is_valid = 1
            AND record_id = t.id
        )
    </if>
</where>
ORDER BY t.update_time desc