SQL Server

Delete from table where primary key = (select top 1 primary key from table where same field = (Select same field from table group by same field having count (*) >1)) A primary key is a field in a table that has absolutely no duplicate values, such

The maximum data row size in SQL Server2000 is 8060 (we can use a size of 8039), that is, when the table is created, the sum of all columns cannot be more than 8060. In 2005, this limit remains for fixed-length data (although in 2005 we can use a

The meaning of the four matches is 0 or more any character representing an arbitrary character [] any single character within the specified range [^] a string with a match in any single character that is not in the specified range must be enclosed

1. Open SQL Server Enterprise Mananger "Enterprise Manager" In the SQL database you want to export, right-click menu: All Tasks-"Export data" 2. Returns an Export wizard window. Select the exported data source, for the database you

X First find the constraint name And then delete it I'll give you an example. --Test environment --Main Table CREATE table test1 (ID int primary key not null,value int) Insert Test1 Select 1,2 Go --From the table CREATE table test2 (id int

Instead of creating a new blank database, follow these steps: 1. Open SQL Server Management Studio 2, on the "database" right click on the "Restore Database (R) ..." 3, enter the database name in the "target database" 4, in the "restored source"

Suppose there is a student score table (T) as follows: Name Subject Result John Language 73 John Math 83 John Physics 93 Dick Language 74 Dick Math 84 Dick Physics 94 Want to become Name Chinese mathematics Physics Zhang 373 83 93 Lee 474

Repair system tables (table Error-Object ID 2. Text, ntext, or image node (in page (1-875), slot 0, text ID 177078272) and the node is on the page (1-500), the reference at slot 14 does not match) Repair database, should be a more familiar with the

Solution:Direct attach or attach should not be, with script + guide data definitely no problem.Sql2005 steps to go to Sql20001. Generate a For 2000 version of the database scriptSql2005 's Manger Studio--Open "Object Explorer" (no words pressed F8),

Select operation: ' SQL Server database backup and restore! ' http://www.dwww.cn Dim Sqlserver,sqlname,sqlpassword,sqllogintimeout,databasename,bak_file,act SQL Server = "localhost" \ sqlname = "sa" User name sqlpassword = "sa" password

server| Backup | recovery | data | database One, BACKUP database 1. Open SQL Enterprise Manager, click to open Microsoft SQL Server in the console root directory2, SQL Server group--> double hit Open your server--> double-click to open the database

server| Page | resolution | data | statement For example: request to select the No. 3000 page of tbllendlist records, each page 100 records. ----------Method 1:----------Select Top * from Tbllendlistwhere Fldserialno not in(Select Top 300100

server| Data | data type (1) char, varchar, text and nchar, nvarchar, ntext The length of char and varchar is between 1 and 8000, the difference being that char is a fixed-length character data, and varchar is variable-length character data. The

server| Create | data | Database Creating ************************ using the Adodb.connect object Dim oconn Dim Sdatabasename Sdatabasename = "Codecreatedb" Set oconn = Server.CreateObject ("ADODB. Connection ") oConn.Open "Provider=sqloledb;data

Server begin: SQL Server views Posted by Scott on November 28, 2004 An RDBMS uses a view to create a virtual table. The careful use the views can improve the interaction between a. NET application and the underlying data. In this article we'll

server| Script Set conn = Server.CreateObject ("ADODB. Connection ") Conn.Open "ODBC name", "username", "password" Sql1= "SELECT * from dbo.sysobjects where type is not in (' S ', ' D ', ' K ')" Sql1= "SELECT * from dbo.sysobjects where type = '

server| performance when you suspect that your computer hardware is the primary reason for the performance impact of SQL Server running, you can use the SQL Se RVer Performance Monitor monitors the load of the appropriate hardware to confirm your

server| function In fact, this function is not provided by SQL Server, is tofu written, we do not because of tofu piece of everyone To use a stone to hit tofu: In fact, since this function generated after we use, it is impossible to distinguish

server| Data | data type/// Comparison of data types in the database with C # private string Changetocsharptype (String type) { String reval=string. Empty; Switch (type. ToLower ()) { Case "int": Reval= "Int32"; Break Case "Text": Reval= "String";

asp.net|server| Data | database Module Mdlcommon Public txtsql as String ' holds SQL statements Public dbset as DataSet ' query-obtained recordset Public errormsg as String ' holds error message Public Function ExecuteSQL (ByVal strSQL As String,