1 ---查询当前数据库一共有多少张表
2 select COUNT(1) from sysobjects where xtype=‘U‘
3
4 ---查询当前数据库有多少张视图
5 select COUNT(1) from sysobjects where xtype=‘V‘
6
7 ---查询当前数据库 有多少个存储过程
8 select COUNT(1) from sysobjects where xtype=‘P‘
9
10 -- row_number()函数用法 row_number() over (order by cloumn) from tableName
11 select ROW_NUMBER() over (order by cardNo ),* from T_ValueCard
12
13
14 select type from sysobjects group by type
15 --
16 select * from sysobjects
17
18
19 --触发器
20 if not exists (select * from sysobjects where id=OBJECT_ID(‘Student‘) and name=‘Student‘)
21 begin
22 create table Student --学生表
23 (
24 StudentID int primary key, --学号
25 StudentName nvarchar(15) --姓名
26 )
27 end
28
29 if not exists (select * from sysobjects where id=OBJECT_ID(‘BorrowRecord‘) and name=‘BorrowRecord‘)
30 begin
31 create table BorrowRecord --借书记录表
32 (
33 RecordID int primary key, --流水号
34 StudentID int, --学号
35 OutTime datetime, --借出时间
36 ReturnDate datetime --归还时间
37 )
38 end
39
40 --创建触发器语法
41 --create trigger trigger_name
42
43 --on {table_name | view_name}
44
45 --{for | After | Instead of } [ insert, update,delete ]
46
47 --as sql_statement
48
49 --删除触发器 drop trigger trigger_name
50
51 -- 查看当前数据库的触发器
52 --select * from sysobjects where type=‘TR‘
53 --查看某个触发器
54 --exec sp_helptext ‘TStudent‘
55
56 --触发器实例----触发器是属于隐式的
57 --create trigger TStudent
58 --on Student --在Student表中创建触发器
59 --for Update --针对什么事件触发
60 --as --时间触发后要做的事情
61 --if update(StudentID)
62 --begin
63 -- Update BorrowRecord
64 -- set StudentID=i.StudentID
65 -- from BorrowRecord br,Deleted d,Inserted i --Deleted和Inserted为临时虚拟表
66 -- where br.StudentID=d.StudentID
67 --end
68 --go
69
70 --查询的时候临时生成自定义数据列
71 select ‘Web‘ as SourceName,* from TM_Goods
72 --生成空列数据
73 select ‘‘ as SourceName, * from TM_Goods
74
75
76
77 --- 所查列的值出现特殊结果字符 给这个结果字符加单引号 如下所示的Sex字段
78 select top 20 ID, GuestName,MemNo,CardNo, [Identity], BagNo,BoxNo,case Sex when ‘M‘ then ‘男‘ when ‘F‘ then ‘女‘ end as Sex,Holes,
79 case [Status] when 1 then ‘已预约‘ when 2 then ‘已来场登记‘ when 3 then ‘已球场登记‘ when 4 then ‘已出发‘
80 when 5 then ‘已离场‘ when 6 then ‘已结账‘ when 7 then ‘退回结账‘ when -1 then ‘已取消预约‘ when -2 then ‘取消登记‘
81 when 0 then ‘未知‘ end as [Status],
82 StrategyCode, CreateTime,CheckinTime, Creator, CheckOutTime, CheckoutUser,
83 LastEditTime, LastEditor ,ExpiryDate, MainCardNo,
84 SalemanCode from Checkin
85
86 ---查询的时候如果结果里面包含空格或者特殊字符可以等量替换然后在进行查询
87 select * from TM_Goods where REPLACE(Name,‘ ‘,‘‘)=REPLACE(‘海立得 车载型空气净化机‘,‘ ‘,‘‘)
88
89 ---死锁有关脚本
90 create proc [dbo].[p_lockinfo]
91 @kill_lock_spid bit=1, --是否杀掉死锁的进程,1 杀掉, 0 仅显示
92 @show_spid_if_nolock bit=1 --如果没有死锁的进程,是否显示正常进程信息,1 显示,0 不显示
93 as
94 declare @count int,@s nvarchar(1000),@i int
95 select id=identity(int,1,1),标志,
96 进程ID=spid,线程ID=kpid,块进程ID=blocked,数据库ID=dbid,
97 数据库名=db_name(dbid),用户ID=uid,用户名=loginame,累计CPU时间=cpu,
98 登陆时间=login_time,打开事务数=open_tran, 进程状态=status,
99 工作站名=hostname,应用程序名=program_name,工作站进程ID=hostprocess,
100 域名=nt_domain,网卡地址=net_address
101 into #t from(
102 select 标志=‘死锁的进程‘,
103 spid,kpid,a.blocked,dbid,uid,loginame,cpu,login_time,open_tran,
104 status,hostname,program_name,hostprocess,nt_domain,net_address,
105 s1=a.spid,s2=0
106 from master..sysprocesses a join (
107 select blocked from master..sysprocesses group by blocked
108 )b on a.spid=b.blocked where a.blocked=0
109 union all
110 select ‘|_牺牲品_>‘,
111 spid,kpid,blocked,dbid,uid,loginame,cpu,login_time,open_tran,
112 status,hostname,program_name,hostprocess,nt_domain,net_address,
113 s1=blocked,s2=1
114 from master..sysprocesses a where blocked<>0
115 )a order by s1,s2
116
117 select @count=@@rowcount,@i=1
118
119 if @count=0 and @show_spid_if_nolock=1
120 begin
121 insert #t
122 select 标志=‘正常的进程‘,
123 spid,kpid,blocked,dbid,db_name(dbid),uid,loginame,cpu,login_time,
124 open_tran,status,hostname,program_name,hostprocess,nt_domain,net_address
125 from master..sysprocesses
126 set @count=@@rowcount
127 end
128
129 if @count>0
130 begin
131 create table #t1(id int identity(1,1),a nvarchar(30),b Int,EventInfo nvarchar(255))
132 if @kill_lock_spid=1
133 begin
134 declare @spid varchar(10),@标志 varchar(10)
135 while @i<=@count
136 begin
137 select @spid=进程ID,@标志=标志 from #t where id=@i
138 insert #t1 exec(‘dbcc inputbuffer(‘+@spid+‘)‘)
139 if @标志=‘死锁的进程‘ exec(‘kill ‘+@spid)
140 set @i=@i+1
141 end
142 end
143 else
144 while @i<=@count
145 begin
146 select @s=‘dbcc inputbuffer(‘+cast(进程ID as varchar)+‘)‘ from #t where id=@i
147 insert #t1 exec(@s)
148 set @i=@i+1
149 end
150 select a.*,进程的SQL语句=b.EventInfo
151 from #t a join #t1 b on a.id=b.id
152 end
153 GO
时间： 2024-11-07 18:03:40