① sql 查詢一個欄位所有的之出現次數大於2的條數
withtmp(Name)as(
select'張三'unionall
select'張三'unionall
select'李四'unionall
select'王五'unionall
select'王五'unionall
select'王五'unionall
select'趙六'unionall
select'趙六')
selectcount(*)from(
(*)>1
)t
結果為:
② sql篩選出記錄數大於2的記錄
select id,count(*) from 表
group by id
having count(*)>=2
③ SQL 查詢一個表中 兩個欄位數量都大於2條記錄的數據
SQL 查詢一個表中 兩個欄位數量都大於2條記錄的數據
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篩選出記錄數大於2的記錄
假如table有四列a1,a2,a3,a4
先取出前a條記錄,然後進行分組,並且分組後的結果大於1的就是重復的記錄
select
a1,a2,a3,a4
from
(
select
top
a
*
from
table)
a
group
by
a1,a2,a3,a4
having
count(*)>1
⑤ SQL 查詢一個表中 兩個欄位數量都大於2條記錄的數據
SQL
查詢一個表中
兩個欄位數量都大於2條記錄的數據
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查詢:我想查找某一表裡是否有超過兩次的記錄如何查找
查詢有2個以上X:
select * from 表 where X in
(
select X from 表
group by X
having count(X) > 1
)
查詢X,Y,Z有2個以上:
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查找一列中某一數值出現次數大於2的記錄
需要用group by中的having子句。
1、如test表中有如下數據: