sql create table primary key autoincrement

1. Create a table Copy codeThe Code is as follows: createtableTest_Increase ( Useridnumber (10) NOTNULLprimarykey,/* Primary Key, automatically added */ Usernamevarchar2 (20) ); 2. Create an automatic growth sequenceCopy codeThe Code is as follows: CREATESEQUENCETestInc

SQL primary key constraints and foreign key constraints, SQL primary key constraintsPrimary key constraint

SQL statement query the table name/column name/primary key/automatic Growth Value in the database---- Query tables created by users in the database---- Jsj01 indicates the database name.Select name tablename from jsj01.. sysobjects where type = 'U' and name not in ('dtproperties ')-- Query the field information in the

For example, there are three fields: Table person, person, id (mysql database, primary key, non-auto-increment), and name and pswd. In the case of auto-increment, we usually process insertintoperson (name, pswd) values (# {name}, # {pswd}) in this way. you are not allowed to insert a primary

Label:Sometimes to get the table primary key field, although the system from the stored procedure can be obtained, but for familiar with the system table, it is easy to write yourself.2 Declare @table_name varchar 3 Set @table_name = ' Table_pqs ' 4 --1, according to system stored procedure 5 Execute

1. Create a tableCopy codeThe Code is as follows:CreatetableTest_Increase (Useridnumber (10) NOTNULLprimarykey,/* Primary Key, automatically added */Usernamevarchar2 (20)); 2. Create an automatic growth sequenceCopy codeThe Code is as follows:CREATESEQUENCETestIncrease_SequenceINCREMENTBY1 -- add a fewSTARTWITH1 -- cou

() {} Finnaly { if (rs!=null) Try{rs.close ();} catch (Exception e) {} if (STM ...). If (CN ... ...). } 3. Scrollable cursors pagesize=20; PageNo = 5; CN = NULL stmt = null; rs = null; Try { Sqlserver:sql = "SELECT * from articles"; DataSource ds = new InitialContext (). lookup (Jndiurl); Connection cn = Ds.getconnection (); "SELECT * from user where id=?" --->binary directive PreparedStatement pstmt = cn.preparesatement (sql,resultset.type_scroll_

Sometimes you need to obtain the table primary key field. Although the system can obtain it from a stored procedure, you can easily write it yourself if you are familiar with the system table. Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->2 declare @ table_name varcha

of database is a very broad problem. This paper mainly aims at the present situation of the author's development and Application, and discusses the problems and corresponding solutions to the design of table's primary key when designing the table on MS SQL Server. 2. Primary