mysql - 如果 MySQL 中的 count 大于 5 则更新

Question

我正在尝试创建一个查询，该查询将更新table_1列的位置id_owner比5 rows相同的多owner id，它需要将列“ active”设置为3用户拥有的所有行。

我尝试了几种不同的方法，但每种方法都是空的。有任何想法吗？

Answer 1

使用此UPDATE查询JOIN来实现此目的：

UPDATE table1 t1 
  JOIN
  (
    SELECT id_owner
      FROM table1
     GROUP BY id_owner
    HAVING COUNT(*) > 5
  ) t2
  ON t1.id_owner = t2.id_owner
  SET t1.active = 3;

请参阅此示例 SQLFiddle

Answer 2

你可以试试这个：-

update table_1
set active = 3
where owner_id in
(
  select * from
  (
    select owner_id
    from table_1
    group by owner_id
    having count(*) > 5
  ) a
)

Answer 3

update table_1
set active = 3
where owner_id in
(
  select * from
  (
    select owner_id
    from table_1
    group by owner_id
    having count(*) > 5
  ) x
)

SQLFiddle 演示