MYSQL ²éÕÒ³öÖØ¸´ÁÐÖµ - MS-SQL Server / ÒÉÄÑÎÊÌâ
DB: MySql
Problem:
create table aaa(
id int primary key,
phone varchar(100),
name varchar(50)
)
insert into aaa values(000101,'111','jackie');
insert into aaa values(000102,'222','milk');
insert into aaa values(000103,'111','lucy');
insert into aaa values(000104,'111','mechelle');
insert into aaa values(000105,'222','tom');
insert into aaa values(000106,'333','roy');
²éÕÒ³öphoneÁÐÓÐÖØ¸´µÄÖµ£¬¼´count(phone)>=2µÄÖµÁгöÀ´
Required Result:
phone num
111 3
222 2
Çë¸ßÊÖ½â´ð£¬ÔÚÏߵȣ¬Ð»Ð»
SQL code:
select phone,
count(*)num
from aaa
group by phone
having count(*)>=2
SQL code:
create table aaa(
id int primary key,
phone varchar(100),
name varchar(50)
)
insert into aaa values(000101,'111','jackie');
insert into aaa values(000102,'222','milk');
insert into aaa values(000103,'111','lucy');
insert into aaa values(000104,'111','mechelle');
insert into aaa values(000105,'222','tom');
insert into aaa values(000106,'333','roy');
select phone,
count(*)num
from aaa
group by phone
having count(*)>=2
drop table aaa
/*
phone
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