sql create table primary key autoincrement

in two tables to control the data that can be stored in the foreign key table. In a foreign key reference, a link is created between two tables when one or more of the columns containing the primary key values of one table are re

Tags: integrity alt otto ack article ble sql ima back primary KEY (Primary key) each of the data in the table is a unique value in the form. In other words, it is a unique way to identify each row of data in a

My BSOOC need a query table primary key foreign key information of SQL, last night research to 1 o'clock in the morning, finally can achieve this goal: Oracle: Select O.obj# as ObjectId, o.name as TableName, oc.name as ConstraintName, Decode (c.type#, 1, ' C ', 2, ' P ', 3,

Label:First, SQL constraints Constraints are used to restrict the type of data being added to the tag 　　You can specify the constraint (via the CREATE TABLE statement) when creating the table, or after the table is created (via the ALTER

followingCommand:Select * From user_constraints where table_name = "tabnam "; ". If it is changed to delete, the deletion is successful. The explanation provided on the Internet is the difference between DDL and DML (because truncate isn' t going to verify the constraint, truncate is DDL .). Solution: SQL> ALTER TABLE ep_pointdisable primary

Tags: htm string triggers display interpreting ref DBA more alterORACLE: Enquiry ( See ) table primary key, FOREIGN key, uniqueness constraint, and index 1. Find all indexes of the table (including index name, type, constituent column)Select T.*,i.index_type from User_ind_co

Tags: SQL primary key foreign keyprimary KEY (Primary key) each of the data in the table is a unique value in the form. In other words, it is a unique way to identify each row of data i

Insert a record to the master table, retrieve the primary key of the record of the master table, and assign values to multiple records from the table. Public void createworkordgrid (pp_workord_hd headobject, list 　　 Insert a record to the master

. Because the field is to be the primary key for a table, the first condition is to ensure uniqueness in the table. At the same time, combining the characteristics of the SQL Server database itself, you can create a self-adding c

Tags: style java data ar javascript amp new sizeMySQL View table structure commandShow columns from table name;1, copy table structure and data to new Table CREATE table new Table selec

Problem Description: A basic information table, with more than 30 tables in the system, there is a foreign key relationship, when the basic data to delete, you need to determine whether has been used, if used to change the flag, if not used to delete directly, how to achieve this deal well? It's best to automatically adapt to changes in the table Problem Resolu

Some SQL (under Oracle) summaries used in the project: 1. Find all indexes of the table (including index name, type, constituent column) 1 Select T.*,i.index_type from User_ind_columns t,user_indexes i where t.index_name = I.index_name and T.tab Le_name = i.table_name and t.table_name = table to query2. lookup table's primar