① sql 查询一个字段所有的之出现次数大于2的条数
withtmp(Name)as(
select'张三'unionall
select'张三'unionall
select'李四'unionall
select'王五'unionall
select'王五'unionall
select'王五'unionall
select'赵六'unionall
select'赵六')
selectcount(*)from(
(*)>1
)t
结果为：
② sql筛选出记录数大于2的记录
select id,count(*) from 表
group by id
having count(*)>=2
③ SQL 查询一个表中 两个字段数量都大于2条记录的数据
SQL 查询一个表中 两个字段数量都大于2条记录的数据
SELECT *
FROM A表 W
WHERE EXISTS(SELECT s_id,s_name FROM A表 WHERE sid=W.sid and s_name=W.s_name group by s_id,s_name having count(*)>=2)
④ sql筛选出记录数大于2的记录
假如table有四列a1,a2,a3,a4
先取出前a条记录，然后进行分组，并且分组后的结果大于1的就是重复的记录
select
a1,a2,a3,a4
from
(
select
top
a
*
from
table)
a
group
by
a1,a2,a3,a4
having
count(*)>1
⑤ SQL 查询一个表中 两个字段数量都大于2条记录的数据
SQL
查询一个表中
两个字段数量都大于2条记录的数据
SELECT
*
FROM
A表
W
WHERE
EXISTS(SELECT
s_id,s_name
FROM
A表
WHERE
sid=W.sid
and
s_name=W.s_name
group
by
s_id,s_name
having
count(*)>=2)
⑥ SQL查询：我想查找某一表里是否有超过两次的记录如何查找
查询有2个以上X：
select * from 表 where X in
(
select X from 表
group by X
having count(X) > 1
)
查询X,Y,Z有2个以上：
select * from 表 where X in ( select X from 表 group by X having count(X) > 1)
union
select * from 表 where Y in ( select Y from 表 group by Y having count(Y) > 1)
union
select * from 表 where Z in ( select Zfrom 表 group by Z having count(Z) > 1)
⑦ sql查找一列中某一数值出现次数大于2的记录
需要用group by中的having子句。
1、如test表中有如下数据：