SQL Server

Copy codeThe Code is as follows:DECLARE @ TempTable table (UserID int, UserName nvarchar (50 ));Insert into @ TempTable (UserID, UserName) values (1, 'A ')Insert into @ TempTable (UserID, UserName) values (2, 'B ') Select UserID, UserName from @

I. symptom When executing SQL Server distributed transactions, SQL Server 2005 receives the following error:Message 7391, level 16, status 2, process xxxxx, 16th rowsThis operation cannot be performed because the ole db access interface "SQLNCLI" of

For the relationship between them, refer to the following figure to show the relevant test examples: The test examples are as follows:Copy codeThe Code is as follows:Use tempdbGoIf (object_id ('t1') is not null) drop table t1If (object_id ('t2') is

I. test environment: 1. Database: SQL Server 20082. Test Table: 15000 records, char primary key, no other indexes3. Test Field: ntext type, maximum Data Length: 12000Ii. Test statement: 1. Select * from ProductTemp where ProductDesc like '% 192.168.7

--> Segment update--> Author: wufeng4552--> Date: 2009-10-07 08:13:41-- For example, update 'a, a, a, A'. The result of section 3 a as 'test' is 'a, a, a, test,'Declare @ s varchar (20) -- Updated stringDeclare @ split varchar (10) --

Here is an example of SQL server2005: Create table tb (province nvarchar (10), city nvarchar (10), score int)INSERT tb SELECT 'shaanxi ', 'xiance', 3Union all select 'shaanxi ', 'ankang', 4Union all select 'shaanxi ', 'hanzhong', 2Union all select

XML is added to SQL Server. the Modify () method is xml. modify (insert), xml. modify (delete), xml. modify (replace) corresponds to XML insert, delete, and modify operations.The following XML is used as an example to describe three DML types:Copy

When installing the software, the default access SQL server account is sa, and Management Studio Express is logged on by default using Windows identity authentication. The sa account is found in the Login directory of the system default instance

Shp2sqlserver Usage AnalysisOfficial notes:Shp2sqlserver is a command line tool for loading shapefiles into Microsoft SQL Server 2008. It is modeled after PostGIS's shp2pgsql, cannot that it loads directly into the database instead of writing SQL to

Method 1:1. Open the query analyzer and enter the commandBackup log database_name WITH NO_LOG2. Choose "Enterprise Manager"> "right-click the database to be compressed"> "all tasks"> "shrink Database"> "contract file"> "select" Log File ">" contract

I saw in the book yesterday that the where condition sequence is different for SQL statement optimization, and the performance is different. Is this recommended for Oracle11G? Method 1 is better than method 2?Method 1:Copy codeThe Code is as follows:

Method 1Copy codeThe Code is as follows:Declare @ max integer, @ id integerDeclare cur_rows cursor local for select Main field, count (*) from table name group by main field having count (*)> 1Open cur_rowsFetch cur_rows into @ id, @ maxWhile @

Just take notes. Nothing !!Copy codeThe Code is as follows:-- Create a test tableCreate table [dbo]. [Student] ([ID] [int] IDENTITY (1, 1) not null primary key,[Name] [nvarchar] (20) not null default (''),[Age] [int] not null default (0 ),[Sex] [bit]

Union result setCreate temporary data tableCopy codeThe Code is as follows:Create table T_TempEmployee (FIdCardNumber VARCHAR (20), FName VARCHAR (20), FAge int, primary key (FIdCardNumber ));Insert into T_TempEmployee (FIdCardNumber, FName, FAge)

So what is the use of the Set function? Suppose the database has a table named student. If you want to use this table to find out the numbers of men and women in Jiangxi province, the number of boys in Guangdong province, and the number of men and

Steps for manual differential backup Character Type: 1. Restore the current database; Alter database Current database set recovery full -- 2. Create a table cmd; Create table cmd (a image )-- 3. Back up the current database to D: \ cmd1; Backup log

Open the SQL Server Enterprise Manager and a window pops up with the following content:Error message:"Microsoft Management Console---------MMC cannot open the file C: Program FilesMicrosoft SQL Server80ToolsBinnSQL Server Enterprise Manager.

SQL statement QueryThe table structure is as follows:ID name gender1 Michael2. Wang Si male3 Lili female4 three male5 Zhao liunan6 Gao Jie male7. Wang 4 female8 Gao Jie female9 three womenHow can I use an SQL statement to query the following results?

1. Calculate the total score and rank each person Select name, sum (score) as allscore from stuscore group by name order by allscore2. Calculate the total score and rank each person Select distinct t1.name, t1.stuid, t2.allscore from stuscore t1,

There are several processing methods for the result set, which are worth explaining.1. union (Union, union all)This is simple. It combines two result sets horizontally. For exampleSELECT * FROMUNIONSELECT * FROM B[Note] union deletes duplicate