SELECT A.ID, A.TITLE, A.CLASSIFY_ID, B.CLASSIFY_NAME, A.CREATED_BY_ENTERPRISE_NAME, A.CREATED_BY_NAME, A.CREATED_TIME, A.SHOW_STATUS_ID, A.SHOW_STATUS, A.STATUS_ID, C.STATUS, A.IS_TOP FROM T_INFORMATION_INFO AS A LEFT JOIN T_INFORMATION_CLASSIFY AS B ON A.CLASSIFY_ID = B.ID LEFT JOIN T_INFORMATION_STATUS AS C ON A.STATUS_ID = C.ID WHERE 1 = 1 AND A.IS_DELETE = 0 AND A.CREATED_BY = #{createdBy} AND A.CREATED_BY_ENTERPRISE = #{enterpriseId} <if test="typeId != null"> AND A.TYPE_ID = #{typeId} </if> <if test="title != null and title != ''"> AND A.TITLE LIKE CONCAT('%',#{title},'%') </if> <if test="classifyId != null"> AND A.CLASSIFY_ID = #{classifyId} </if> <if test="statusId != null"> AND A.STATUS_ID = #{statusId} </if> <if test="enterpriseId != null "> </if> <if test="startTime != null and endTime != null"> AND DATE(A.CREATED_TIME) BETWEEN #{startTime} AND #{endTime} </if> ORDER BY A.IS_TOP DESC,A.CREATED_TIME DESC 优化这串sql

好的，以下是我对这个SQL查询语句的优化建议：

1. 将 WHERE 子句中的常量条件放在 AND 后面，以便使用索引。例如，将 `1=1` 改为 `A.IS_DELETE = 0`。

2. 对于可选条件，可以使用动态SQL的方式来生成查询语句，以避免无效的条件造成的性能影响。例如，对于 typeId、title、classifyId 和 statusId 这些可选条件，可以使用 `<if>` 标签来判断是否需要在 WHERE 子句中添加对应的条件。

3. 对于多表关联查询，最好使用 INNER JOIN 或者 WHERE EXISTS 来代替 LEFT JOIN，因为 INNER JOIN 或者 WHERE EXISTS 更能利用索引加速查询，并且可以避免不必要的关联查询。

4. 对于 ORDER BY 子句中的多个排序条件，最好将 IS_TOP 和 CREATED_TIME 分别作为两个 ORDER BY 子句，以避免排序操作过于复杂。

优化后的SQL查询语句如下所示：

SELECT 
    A.ID,
    A.TITLE,
    A.CLASSIFY_ID,
    B.CLASSIFY_NAME,
    A.CREATED_BY_ENTERPRISE_NAME,
    A.CREATED_BY_NAME,
    A.CREATED_TIME,
    A.SHOW_STATUS_ID,
    A.SHOW_STATUS,
    A.STATUS_ID,
    C.STATUS,
    A.IS_TOP
FROM 
    T_INFORMATION_INFO AS A 
    INNER JOIN T_INFORMATION_CLASSIFY AS B ON A.CLASSIFY_ID = B.ID
    INNER JOIN T_INFORMATION_STATUS AS C ON A.STATUS_ID = C.ID
WHERE 
    A.IS_DELETE = 0 
    AND A.CREATED_BY = #{createdBy}
    <if test="enterpriseId != null">
        AND A.CREATED_BY_ENTERPRISE = #{enterpriseId}
    </if>
    <if test="typeId != null">
        AND A.TYPE_ID = #{typeId}
    </if>
    <if test="title != null and title != ''">
        AND A.TITLE LIKE CONCAT('%',#{title},'%')
    </if>
    <if test="classifyId != null">
        AND A.CLASSIFY_ID = #{classifyId}
    </if>
    <if test="statusId != null">
        AND A.STATUS_ID = #{statusId}
    </if>
    <if test="startTime != null and endTime != null">
        AND DATE(A.CREATED_TIME) BETWEEN #{startTime} AND #{endTime}
    </if>
ORDER BY 
    A.IS_TOP DESC,
    A.CREATED_TIME DESC;

希望这些优化建议能够帮助您优化这个SQL查询语句。