QQ数据管理系统

QQ数据管理系统(增删改查)

--QQ数据管理库
--向QQUser插入数据
insert into [dbo].[QQUser]
values 
('6489390000','b1234567','2019-11-08',2,1)

--向Baselnfo插入数据
insert into [dbo].[BaseInfo]
values 
('2000895678','个性男孩','男',20,'河南省','开封','祥符区','13834923932')

--查询数据
--查询QQ号码为“9473035360”的用户的所有好友信息，包括QQ号码，昵称，年龄
select r.RelationQQID as 好友QQ号码,b.NickName as 昵称,b.Age as 年龄
from [dbo].[Relation] as r
inner join [dbo].[BaseInfo] as b on(r.RelationQQID=b.QQID)
where r.QQID='9473035360'and r.RelationStatus=0 

--查询当前在线用户信息
select *
from [dbo].[QQUser]
where [Online]=0

--查询开封市，年龄在18~45岁的在线用户的信息
select *
from [dbo].[BaseInfo] b
inner join [dbo].[QQUser] as u on(u.QQID=b.QQID)
where b.Age>18 and b.Age<45 and b.City='开封' and u.Online=0

--查询昵称为“小笨猪”的用户信息
select u.[QQID] as QQ号码,u.passWord as 密码,u.LastLogTime as 最后一次登录时间,u.Online as 在线状态,u.Levei as 用户等级
from [dbo].[QQUser] as u
inner join [dbo].[BaseInfo] as b on(u.QQID=b.QQID)
where b.NickName='出水芙蓉'

--查询QQ号码为6743200008的用户的好友中每个省份的人数，并按照总人数由大到小排序
select b.Province as 省份,COUNT(*) as 总人数
from [dbo].[BaseInfo] as b
inner join [dbo].[Relation] as r on (r.RelationQQID=b.QQID)
where r.QQID='6743200008'and r.RelationStatus=0
group by b.Province
order by COUNT(*)

--查询至少有1天没有登录的QQ账号的用户信息，包括QQ号码，最后一次登录时间，等级，昵称，年龄，并按时间的降序排列
select u.QQID as 至少2天没有登录的QQ号码,u.LastLogTime as 最后一次登录时间,u.Levei as 等级,b.NickName as 昵称,b.Age as 年龄
from [dbo].[QQUser] as u
inner join [dbo].[BaseInfo] as b on(u.QQID=b.QQID)
where DATEDIFF(dd,u.LastLogTime,'2019-11-08')>=2
order by u.LastLogTime desc

--查询QQ号码为“6743200008”的好友中等级为10级以上的用户信息
select r.RelationQQID as 好友QQ号码,b.NickName as 昵称,b.Age as 年龄,e.Levei as 等级
from [dbo].[Relation] as r
inner join [dbo].[BaseInfo] as b on(r.RelationQQID=b.QQID)
inner join [dbo].[QQUser] as e on(r.RelationQQID=e.QQID)
where r.QQID='6743200008' and r.RelationStatus=0 and e.Levei>10

--查询QQ号码为“6743200008”的好友中隐身的用户信息
select r.RelationQQID as 隐身的好友号码,b.NickName as 昵称,b.Age as 年龄 
from [dbo].[Relation] r
inner join [dbo].[BaseInfo] as b on(r.RelationQQID=b.QQID)
inner join [dbo].[QQUser] as e on(e.QQID=r.RelationQQID)
where r.QQID='6743200008' and e.Online=2

--查询好友超过20个的用户QQ号码及其好友总数
select COUNT(*) 好友人数,[QQID] as QQ号码
from [dbo].[Relation]
group by [QQID]
having COUNT(*)>=2

--查询被当作黑名单人物次数排名前20的用户
select COUNT(*) as 黑名单次数,[RelationQQID] as 用户
from [dbo].[Relation]
where [RelationStatus]=1
group by [RelationQQID]

--修改数据
--修改“2000895678”为隐身
update [dbo].[QQUser]
set [Online]=2
where [QQID]='2000895678'

--修改“2000895678”昵称为“被淹死的鱼”地址：“解放中路6号院106室”
update [dbo].[BaseInfo]
set [Address]='解放中路6号院106室',[NickName]='被淹死的鱼'
where [QQID]='2000895678'

--将“2000895678”的好友“6743200008”加入黑名单
update [dbo].[Relation]
set [RelationStatus]=1
where [QQID]='2000895678' and [RelationQQID]='6743200008'

--把小于20级的用户都提升一个等级
update [dbo].[QQUser]
set [Levei]=[Levei]+1
where [Levei]<20

--修改超过365天没有登录的QQ，等级设为-1
update [dbo].[QQUser]
set [Levei]=-1
where DATEDIFF(DD,[LastLogTime],'2019-11-08')>365

--好友数量超过20的用户提升一个等级
update [dbo].[QQUser]
set [Levei]=[Levei]+1
where [QQID] in(
select Relation.QQID
from [dbo].[Relation]
where Relation.RelationStatus=0
group by Relation.QQID
having COUNT(Relation.RelationQQID)>=2)

--把QQ号码为“6743200008”的用户的好友“被淹死的鱼”拖进黑名单，使用IN关键字模糊查询
update [dbo].[Relation]
set [RelationStatus]=1
where [QQID]='6743200008' and [RelationQQID]=(
select [QQID]
from [dbo].[BaseInfo]
where [NickName]='被淹死的鱼') and RelationStatus=0

select * from [dbo].[QQUser]
select * from [dbo].[BaseInfo]
select * from [dbo].[Relation]

--删除数据
--把QQ号码为“9473035360”的用户的黑名单中的用户删除
delete from [dbo].[Relation]
where QQID = '9473035360' and [RelationStatus]=1

--把QQ号码“2000895678”的用户删除
delete from [dbo].[Relation]
where QQID='2000895678' or RelationQQID='2000895678'
delete from [dbo].[BaseInfo]
where QQID='2000895678'
delete from [dbo].[QQUser]
where [QQID]='2000895678'

--将超过1000天没有登录的QQ删除
delete from [dbo].[Relation] where [QQID] in
(
	select [QQID] from [dbo].[QQUser]
	where DATEDIFF(DD,[LastLogTime],'2019-11-08')>2
)
or [RelationQQID] in
(
	select [QQID] from [dbo].[QQUser]
	where DATEDIFF(DD,[LastLogTime],'2019-11-08')>2
)
delete from [dbo].[BaseInfo] where [QQID] in
(
	select [QQID] from [dbo].[QQUser]
	where DATEDIFF(DD,[LastLogTime],'2019-11-08')>2
)
delete from [dbo].[QQUser] where [QQID] in
(
	select [QQID] from [dbo].[QQUser]
	where DATEDIFF(DD,[LastLogTime],'2019-11-08')>2
)