sql server create table primary key autoincrement

\ ' database name \ ', \ ' autoshrink\ ', \ ' true\ '\\\ ' Add field general functionSub AddColumn (Tablename,columnname,columntype)Conn.execute (\ "Alter Table \" tablename\ "ADD \" columnname\ "\" columntype\ "\")End Sub\\\ ' Change field general functionSub Modcolumn (Tablename,columnname,columntype)Conn.execute (\ "Alter Table \" tablename\ "alter Column \" columnname\ "\" columntype\ "\")End Sub\\\ '

withno_logDBCCshrinkdatabase (database name)execsp_dboption \'database name \', \'autoshrink\', \'true\' \\\'Add field General function Sub AddColumn (tablename,columnname,columntype) Conn.execute (\ "Alter Table \" tablename\ "add \" columnname\ "\" columntype\ "\") End Sub \\\'Change the field general function Sub Modcolumn (tablename,columnname,columntype) Conn.Execute(\"Alter Table\"TableName\"Alter C

Create Table ds_tcategory -- problem category information table (categoryidint identity () primary key, -- category ID, primary key, automatically increasing categorynamevarchar (20) un

Access build table SQL statement CREATE TABLE set auto-Grow column keyword AutoIncrement use methodSQL AUTO INCREMENT Fielduto-increment will generate a unique number when the new record is inserted into the table. AUTO INCREMENT

Tags: news specify table generation development reference scope. COM Latest getDuring the development process, the primary key of the main table is self-increment, it is necessary to get increment value in order to insert the Word table data, get the following three kinds of

There are five types of constraints in SQL Server,Primary key constraints,Foreign key constraints,Unique constraints,Default constraints, and Check constraints, use SQL Server2008 today to demonstrate how these constraints are cre

records can be determined based on the value of the primary key. If you specify a PRIMARY key constraint for a table, the SQL Server 2005 database engine enforces the uniqueness of th

key of the table, the first condition is that it must be unique in the table. In addition, you can create an auto-increment column for the SQL Server database based on its own characteristics:

\ ' database name \ ', \ ' autoshrink\ ', \ ' true\ '\\\ ' Add field general functionSub AddColumn (Tablename,columnname,columntype)Conn.execute (\ "Alter Table \" tablename\ "ADD \" columnname\ "\" columntype\ "\")End Sub\\\ ' Change field general functionSub Modcolumn (Tablename,columnname,columntype)Conn.execute (\ "Alter Table \" tablename\ "alter Column \" columnname\ "\" columntype\ "\")End Sub\\\ '

Create a table:Create table [table name]([Automatic number field] int IDENTITY (1, 1) primary key,[Field 1] nVarChar (50) default \ 'default value \ 'null,[Field 2] ntext null,[Field 3] datetime,[Field 4] money null,[Field 5] int default 0,[Field 6] Decimal (12, 4) default 0

Http://blog.sina.com.cn/s/blog_a342ff0a0101u3kb.htmlSQL Server:Solution 1:select Top * from a where ID not in (select top with ID from a);Solution 2:select Top * from a Where ID > (select MAX (ID) from (select top with ID from a) as A);As I understand it,The first method: first 30 data (the default positive order) is queried based on the ID, and then the first 10 data in the 30 data is queried in the positive order.The second method: first, according to the ID positive sequence query the top 30

--CREATE database Db_std_mgr_sys; UseDb_std_mgr_sys;Create TableStudent (std_idbigint not NULLAuto_increment,std_namevarchar(Ten) not NULL default "', Std_codevarchar( -) not NULL default "'Comment'study number, the value is unique', Std_sexvarchar(8) not NULL default "', Std_phonevarchar( -) not NULL default "', school_idbigint not NULL default -1Comment'Your School ID', grade_idBIGINT not NULL default

* ** Filename: DropKeyAddKey. SQL * Description: If you want to modify the attribute of the table's primary key field, you need to delete the primary key and then recreate the primary key