Jump to content

create a relation between two tables mysql


karthika44

Recommended Posts

Since the two tables have no fields in common, I assume you want a linking table ("Weak Entity") between the two, something like this: 

create table employee_attendance 
( empno ... 
, att_date ... 
, Ot ... 
, primary key ( empno, att_date, Ot ) 
, foreign key empno references employee ( empno )
, foreign key ( att_date, Ot ) references attendance( att_date, Ot )
); 

I'm guessing at the primary Key for the attendance table here - an employee would attend something ("Ot?") on a given date.  

Don't use reserved words, like date, for table or column names.  Eventually, it will come back to bite you.

Regards, 
  Phill W.

Link to comment
Share on other sites

This thread is more than a year old. Please don't revive it unless you have something important to add.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.