teradata create table with primary key

CREATE DATABASE Db_studentinfo; Use Db_studentinfo;D rop TABLE IF EXISTS t_student; CREATE TABLE t_student (studentid varchar (+) NOT NULL, Stuno varchar (DEFAULT) NULL, stuname varchar DEFA ULT NULL, Stusex varchar (TEN) default NULL, Stubirthday date default NULL, STURXSJ date default NULL, Stunation varchar () de

Oracle Table-Building, primary key, foreign key basic syntax -Create TABLE syntax:CREATE TABLE Table name (Field name 1 field type (length)

Tags: mat and products Type way query data str whereMode 1: Select b.column_name from information_schema.table_constraints a inner join information_schema.constraint_column_usage b = b.constraint_name where ' PRIMARY KEY ' ' Products ' Go Mode 2: SELECT A.name From syscolumns a inner joins sysobjects d on a.id=d.id where d.name= 'products'1where xtype='PK' And in (the SELECT

Original: MS SQL Server searches for the column name of a table's primary keySELECT syscolumns. Name from syscolumns,SYSOBJECTS,sysindexes,SysindexkeysWHERE syscolumns. ID =object_id(' tab_xxx ')--syscolumns.id The Table object ID that the column belongs to andSYSOBJECTS. Xtype =' PK ' --sysobjects.xtype Object TypeandSYSOBJECTS. Parent_obj =syscolumns. IDandsysindexes. ID =syscolumns. IDandSYSOBJECTS. Name

The Scott. Bonus table does not have a primary key and does not have a unique index. If it is sent from the GG source end, the GG target end is abend, unless the target replication process parameter file has applynoopupdates or allownoopupdates parameters) Update Scott. T1 set ename = 'bos 'where ename = 'bos2 '; When the GG destination is abend, The rpt file i

Select Table name = case when a. colorder = 1 then D. Name else ''end, Table description = case when a. colorder = 1 then isnull (F. Value, '') else'' end, FIELD No. = A. colorder, Field name = A. Name, Id = case when columnproperty (A. ID, A. Name, 'isidentity ') = 1 then' √ 'else' end, Primary Key = case when exists

Select Syscolumns . Name From Syscolumns , Sysobjects , Sysindexes , Sysindexkeys Where Syscolumns . ID = Object_id ( 'Tab _ XXX' ) -- Syscolumns. ID is the table Object ID of the column. And Sysobjects . Xtype = 'Pk' -- Sysobjects. xtype object type And Sysobjects . Parent_obj = Syscolumns . IDAnd Sysindexes . ID = Syscolumns . IDAnd Sysobjects . Name = Sysindexes . NameAnd Sysindexkeys . ID =Syscolumns . IDAnd Sysindexkeys . Indid = Sysind

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

Next, in the previous article, the INFORMATION_SCHEMA view is mentioned in the SQL table structure information query including the primary and Foreign keys and self-growth. In fact, in SQL2005, Microsoft has promoted the use of the INFORMATION_SCHEMA System View instead of using sys Dongdong, of course, there is still a lot of information that can only be queried through the sys view. Here we will query the

Recently, I have been working on restructuring database tables. Today I have encountered a related operation on getting the primary key of a [given table name] and performing other related operations. Public String [] gettablepk (string tablecodes) throws exception {

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

Label:The database for the new project uses the GUID as the database primary key.The main considerations are as follows:1, follow-up may have data migration2. Sync, merge, etc. between server and client to avoid data conflict3. Business agnostic of primary key4, the initial data consistency (such as the basic data dictionary, test data, etc.)The following is a script that creates an ordered uniqueidentifier

example, for the table above, if you want the ID field to implement self-increment. Each time you insert a record, use a syntax similar to the following (provided the table and sequence are already built).INSERT into test values (S_test.nextval, ' Zhang San ');Of course, you can also automatically, to insert operations on the table, to

GO--determine if the table exists in the way 1if object_id(N'Ef_user'N'U') is NULL--determine if the table exists in the way 2--If not EXISTS (SELECT * FROM dbo. SysObjects WHERE id = object_id (N ' [Ef_user] ') and OBJECTPROPERTY (ID, ' istable ') = 1)begin--directly create a table with the self-increment and specify

$sql = "SELECT * from person", $result = mysql_query ($sql, $con) and while ($property = Mysql_fetch_field ($result)) {echo "Fi Eld name: ". $property->name. "Key fields:echo "Primary Key:". $property->primary_key. "PHP query MySQL table's primary key

when inserting data into a table, if the primary key is a self-growing type, then we can not assign a value to the primary key column, but sometimes the primary key is exactly the forei

Label:JDBC Gets the primary key of the table Case, create an order, and insert data into the order list according to the order number SQL statements: Create two tables CREATE TABLE Orde

SQL> drop table T1 purge; The table has been deleted. SQL> Create Table T1 as select * from EMP; The table has been created. SQL> ALTER TABLE T1 Add a varchar2 (20 ); The table has been

Small knowledge Point: Dual is a pseudo table, is a single field, a row of records of the table. do not need to get the data from the table, but simply in order to get some of the information we want, and to complete through select, it is necessary to use an object, this object, is dual; --1, creating a sequence Create