| wanted to make a child a table [message #7994] |
Mon, 21 July 2003 10:18  |
hardik
Messages: 12
Registered: December 2001
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Junior Member |
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hey there good morning
i am having one problem i am a beginner and wanted some help to make an existing talbe as a child with the data inside.
i have 2 tables and both r having data but i forgot to make one of them as a child table so how can i make tht if i have the repeated values in the child table there is a parent table and parent key but i can not create a reference key on tht table
so please do send me the information thanks a lot for the help
have a good day...
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| Re: wanted to make a child a table [message #8007 is a reply to message #7994] |
Tue, 22 July 2003 01:30  |
Ganesh
Messages: 31
Registered: November 2000
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Member |
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Try this. Hope this is what U expected...
Take for example our default tables (dept,emp)
dept - master table
emp - trans table
In dept table deptno should be Primary key. If U haven't specified already give the following command.
>ALTER TABLE DEPT ADD PRIMARY KEY(DEPTNO);
In 'emp' table 'deptno' is a foreign key which references 'deptno' of 'dept' table. To specify this,
>ALTER TABLE EMP ADD FOREIGN KEY(DEPTNO) REFERENCES DEPT(DEPTNO)
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