sql create table with foreign key

How to add innoDB to phpMyAdmin PhpNow (the free green Apache + PHP + MySQL environment package under Win32) finds that the database does not support the innoDB Engine by default. Many methods have been tried on the Internet. The following method is valid, for your reference: 1. modify my. ini In the MySQL directory of the phpNow tool (such... \ PHPnow-1.5.6 \ MySQL-5.0.90) Find my. ini: Search for skip-innodb. After searching, comment it out (# skip-innodb). Note that some people on the In

Seemingly useful, but not really used:SQL the role of the primary key and foreign key: Foreign key value rule: A null value or a reference primary key value. (1) when a non-null value is inserted, it cannot be inserted if the val

Label:Use LianxiGo--Create a departmental tableCREATE TABLE Bumen(Bmcode int PRIMARY KEY,--department numberBmname varchar (20),--Department nameBmceo varchar (20),--head of departmentBmtel varchar (20),--Department phone)Go--Create a people tableCREATE TABLE Renyuan(Code in

No foreign key multi-table query when writing HQL, directly using a comma-delimited table, where as a federated query criteria to query.The results of the query can be two kinds of,listYou need to use the following statement to qualify the query to return the result type.// list Query query = getsessionfactory (). Open

Recently, to delete a record in the software system, you have to associate the record with multiple tables and there are still constraints between them. Therefore, when creating a table, add constraints as follows: SQL foreign key constraints can achieve cascading deletion and cascading update; Oracle only supports c

Tags: pen specification BPA NOP PHP append MSN Host Solution1: Graphical interface setting foreign keyResolve:table-> Selected Table->design-> Select the field that you want to set the foreign key to, choose Relationships, select Add, select the right ellipsis (see figure I), and then select the relationship in the

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

Label:How to obtain primary foreign key relationships in SQL Server 2008:Transferred from: http://www.cnblogs.com/ke10/archive/2012/06/11/2544655.htmlSELECT object_name (con.constid) ' Relationship name ',object_name (Sf.fkeyid) ' primary key table ',Fcol.name ' primary

-- If the data in obom_stru_expand1 and obom_stru_expand1 is deleted by mistake, you need to import the data -- The current database, but the two tables contain foreign keys. You need to disable the data before causing Alter Table Obom_stru_expand2 Nocheck Constraint All Alter Table Obom_stru_expand2 disable Trigger All Alter