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MySQL查询显示具有最大计数值的记录与其他列值的组？

2024-05-19 19:52:04 396

为此，请使用GROUPBYHAVING子句。让我们首先创建一个表-

create table DemoTable
(
   Value int
);

使用插入命令在表中插入一些记录-

insert into DemoTable values(88);
insert into DemoTable values(88);
insert into DemoTable values(88);
insert into DemoTable values(99);
insert into DemoTable values(99);
insert into DemoTable values(99);
insert into DemoTable values(99);
insert into DemoTable values(100);
insert into DemoTable values(100);
insert into DemoTable values(88);
insert into DemoTable values(88);

使用select语句显示表中的所有记录-

select *from DemoTable;

这将产生以下输出-

+-------+
| Value |
+-------+
|    88 |
|    88 |
|    88 |
|    99 |
|    99 |
|    99 |
|    99 |
|   100 |
|   100 |
|    88 |
|    88 |
+-------+
11 rows in set (0.00 sec)

以下是查询，以在具有其他列的组中显示具有最大计数值的记录。在这里，我们在列中重复了值，并对值进行排序。在ORDERBYDESC之后，我们将获取第一个值并将其计数显示在新列“NumberOfCount”中-

select Value,count(*) as NumberOfCount
   from DemoTable
   group by Value
   having count(*)=(select count(*) as NumberOfCount
      from DemoTable
      group by Value
      order by NumberOfCount desc
      limit 1);

这将产生以下输出-

+-------+---------------+
| Value | NumberOfCount |
+-------+---------------+
|    88 |             5 |
+-------+---------------+
1 row in set (0.00 sec)

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MySQL查询显示具有最大计数值的记录与其他列值的组？

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