sql server update statement with join

Specific actions: Finds the owner of the currently blocked statement based on the SPID and blocked in the master.dbo.sysprocesses, and then uses DBCC INPUTBUFFER () to view the blocking statement. Example: Open three Query Analyzer A, B, C Create a test table Testdia Create Table testdia (ID int); execute the following statement in a: Begin Tran Insert into Te

The following UPDATE statement executes the replace test in www.test.com with ABC Program code Example: Update test SET url= REPLACE (' www.test.com ', ' Test ', ' abc ') Where url REGEXP www.test.com; If in the record, there are similar Www.test.comWww.test1.comWww.test2.com To turn these records into Www.abc.com, execute the

Introduction to the server| statement: Microsoft SQL Server Database SQL statements import the Export encyclopedia, including import and export of data with other databases and files. /******* Export to ExcelEXEC Master.. xp_cmdshell ' bcp SettleDB.dbo.shanghu out c:\temp1.x

Today, when writing a program, you need to generate an SQL statement from the start ID to the end ID. It turns out that you don't need this feature now. How do you query SQL Server for data SQL statements that are queried between the first few to several in the database?For

decimal places, (case when. isnullable = 1 then '1' else'0' end) can be null, isnull (g. [value], '') AS field description FROM syscolumnsLeft join policypes B on a. xtype = B. xusertypeInner join sysobjects d on a. id = d. id and d. xtype = 'U' and d. name Left join syscomments e on a. cdefault = e. idLeft join syspr

methods of emptying SQL Server log files from the 10thOne way: Empty the log.1. Open Query Analyzer, enter command dump TRANSACTION database name with NO_LOG2. Open Enterprise Manager again--right click on the database you want to compress--all tasks--shrink the database--Shrink the file--Select the log file--in the contraction mode to choose to shrink to XXM, here will give an allowable contraction to the

After the Windows host name is changed, a 14274 error occurs when you try to update or delete a job created before SQL Server2000. This error does not occur in SQL 7.0, but this error may also occur after the SQL 7.0 virtual server is upgraded to

.1.8 Between andUse between ... The AND operator can select data that is arranged between two values. The data can be numbers, text, or dates. Using the equivalent of >= and 1.9 TopExample: Check out the top 10 off RecordsSelect Top Ten Account_id,plan_id,statusFrom Account_extensionORDER BY account_idNote that the order of execution, the query data will be sorted before the first 10 rows of recordsIn traditional SQL statements prior to

Many people do not know how SQL statements are executed in SQL Server. They worry that SQL statements they write will be misunderstood by SQL Server. Many people do not know how SQL sta

The following are common SQL statements used by SQL Server and access to operate database structures. The content is organized by HAI wa. if the content is incorrect or incomplete, please submit it. Thank you. Create a table:Create Table [Table name]([Automatic number field] int identity (1, 1) primary key,[Field 1] nvarchar (50) default 'default value 'null,

)) It's a simple paging! Select Htname as type, UNAME as name, dname as County, SNAME as street from hos_house left outerJoin Sys_user on Sys_user. Uid=hos_house. UidJoin Hos_street on Hos_street. Sid=hos_house. SidJoin Hos_district on Hos_district. Did=hos_street. SdidJoin Hos_type on Hos_type. Htid=hos_house. Htidwhere Hos_district. did in(Select Sdid from Hos_street where Sdid in(Select SID from Hos_house Group by SID have (COUNT (*) >=1)) Group by Sdid have (COUNT (*) >=2)) Order BY Sdid Thi

the latter will not generate a large number of locked table scans or index scans.If you want to check whether a record exists in the table, do not use count (*) as inefficient and waste server resources. It can be replaced by exists. For example:If (select count (*) from table_name where column_name = 'xxx ')Can be written:If exists (select * From table_name where column_name = 'xxx ') You often need to write a t_

the following methods:Select * From user1 where [ID] Not in (select top 1[ID] From user1 A where name = user1.name)-- Delete and write it like thisDelete from user1 where [ID] Not in (select top 1 [ID] From user1 A where name = user1.name)Or delete from user where id not in (select max (ID) from user where name = user. Name)Delete [user] Where id not in (select max (ID) from [user] group by name having count (*)> 1)Max or min depends on the actual situation. Other methods:---- A: retain the ro

Reprinted: http://database.51cto.com/art/201006/206351.htm This article mainly tells you about the actual operation rules of SQL Server foreign key update (delete) operations. Previously, table relations were generally used in databases, however, these links are often not used after they are created. This time, when I write a project that involves multi-Tabl

, and the SQL statement is as follows:Select Name,state_desc from sys.databasesVisualize setting Database state：Set to offline: Open the database in Microsoft SQL SERVER Management, right-click on the database, select Tasks-> Offline in the right-click menuSet to Online: if the current state of the database is offline,

, Memusage, login_t IME,4 Last_batch, Ecid, Open_tran, status, SID, Hostname, program_name, hostprocess, cmd, Nt_domain, Nt_u Sername,5 net_address, Net_Library, Loginame, Context_info, sql_handle, Stmt_start, Stmt_end, request_id 6 fromSys.sysprocesses asSP17 WHERE(Blocked 0) and(dbo. Diglock (spid, spid)= 1) Query view v_deadlock_process, if there is a deadlock in the current SQL Server, the query is di

After the project is launched, an automatic backup is created for each database on the database server to ensure the security of customer data. A new backup file is generated every day and stored in the backup folder, in addition, a sub-folder named by the database location is created in the folder, and the backup file is placed in this folder. After a long time, the server space is insufficient, originally