Data modeling update child tables

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I have a data base with 4 tables
Table1 has 1 column car
Table2 has 2 columns car,type
Table3 has 3 columns car,type,owner
Table4 has 4 columns car,type,owner,reg
I want to change the value of car column for table 2 3 and 4 when it changes in table 1 and change the value of type column in table 3 and 4 when it changes in table 2
and change the value of owner column in table 4 when it changes in table 3 same when i create a new entry for car I want it to be created in all the below tables

Posted 18-Sep-12 3:26am

mrDivan

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Andrei Straut 18-Sep-12 9:33am

This sounds more like a design nightmare.

However, I have once heard of PostgreSQL offering a table inheritance system, you might wanna take a look into it (if you're not limited to a certain RDBMS)

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**AmitGajjar** · Answer 1 · 2012-09-18T03:41:00

Solution 1

Hi,

You can create after trigger in your code.

Check MSDN Article on SQL Trigger[^]

Trigger will update your corresponding table if the table is updated.

So, you need to create After update trigger on Table1, Table2, Table3.

It will works for you

Posted 18-Sep-12 3:41am

AmitGajjar