select opp.ID, opp .PROJECT_NUM , tpmu.id , tpmu.overhaul_id from overhaul_project_plan opp left join t_project_management_user tpmu on tpmu.overhaul_id = opp.ID ;对这个sql返回的数据进行 count

可以使用以下 SQL 语句对返回的数据进行计数：

SELECT COUNT(*) FROM (
    SELECT opp.ID, opp.PROJECT_NUM, tpmu.id, tpmu.overhaul_id 
    FROM overhaul_project_plan opp 
    LEFT JOIN t_project_management_user tpmu ON tpmu.overhaul_id = opp.ID
) AS res;

这里使用子查询包裹原始查询结果，然后对子查询结果进行计数。

相关问题

根据id删除 该sql的查询结果 select * from t_project_disclose tpd where tpd.id in ( select tpd.id from t_project_disclose tpd where tpd.project_plan_id not in ( select opp.ID from t_project_disclose tpd join overhaul_project_plan opp on tpd.project_plan_id = opp.ID ) and tpd.version_id = 'd2576fc1e2be4258ac8b624b926cc44c');

根据您提供的 SQL 查询语句，可以使用以下 SQL 语句来根据 id 删除查询结果中的数据：

DELETE FROM t_project_disclose WHERE id IN (
    SELECT tpd.id FROM t_project_disclose tpd 
    WHERE tpd.project_plan_id NOT IN (
        SELECT opp.ID FROM t_project_disclose tpd 
        JOIN overhaul_project_plan opp ON tpd.project_plan_id = opp.ID
    ) 
    AND tpd.version_id = 'd2576fc1e2be4258ac8b624b926cc44c'
);

上述 SQL 语句中，使用了嵌套的 SELECT 语句来获取需要删除的数据的 id，然后使用 DELETE 语句将其从表 `t_project_disclose` 中删除。其中，子查询的条件与原查询语句相同，即 `tpd.project_plan_id NOT IN (SELECT opp.ID FROM t_project_disclose tpd JOIN overhaul_project_plan opp ON tpd.project_plan_id = opp.ID) AND tpd.version_id = 'd2576fc1e2be4258ac8b624b926cc44c'`。请注意备份数据后再进行删除操作。

sql DELETE FROM t_project_disclose WHERE id IN ( SELECT tpd.id FROM t_project_disclose tpd WHERE tpd.project_plan_id NOT IN ( SELECT opp.ID FROM t_project_disclose tpd JOIN overhaul_project_plan opp ON tpd.project_plan_id = opp.ID ) AND tpd.version_id = 'd2576fc1e2be4258ac8b624b926cc44c'); 报以下错误 You can't specify target table 't_project_disclose' for update in FROM clause

这个错误是因为 MySQL 不支持在一个子查询中更新和查询同一个表。

为了解决这个问题，可以使用临时表或者多层嵌套查询来代替子查询。以下是使用多层嵌套查询的示例 SQL 语句：

DELETE FROM t_project_disclose WHERE id IN (
    SELECT id FROM (
        SELECT tpd.id FROM t_project_disclose tpd 
        WHERE tpd.project_plan_id NOT IN (
            SELECT opp.ID FROM t_project_disclose tpd 
            JOIN overhaul_project_plan opp ON tpd.project_plan_id = opp.ID
        ) 
        AND tpd.version_id = 'd2576fc1e2be4258ac8b624b926cc44c'
    ) AS tmp
);

在这个 SQL 语句中，首先使用了一个 SELECT 语句来获取需要删除的数据的 id，然后将其放入一个临时表 tmp 中，最后使用 DELETE 语句将临时表中的数据从表 `t_project_disclose` 中删除。

请注意，如果数据量很大，使用多层嵌套查询可能会导致性能问题，此时可以考虑使用临时表来解决。