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Trigger

Posted on 2011-03-08
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Last Modified: 2012-05-11
How can I create a trigger to INSERT UNIQUE records (id and name for eg.) to Table1 from Table2 and Table3? Table structures:

Table1  
Id (varchar) PK  Name

Table2
.......  Id Name

Table3
........ Id Name

ayha
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Question by:ayha1999
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Expert Comment

by:madgino
ID: 35069814
Are you sure you want a trigger ?
I think you should define a view instead of table 1, this should be the definition:

select id,name from table2
union
select id,name from table3

Union clause will remove duplicate rows if the same values are in both table2 and table3.

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Author Comment

by:ayha1999
ID: 35069863
is it possible to call this view in specified time? What I am trying to do is fill unique records from two tables to one table in a specified time.

thanks

ayha
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Expert Comment

by:madgino
ID: 35069903
The view will behave like a table and you will always have in the view the actual/present data.
So the view is not actually storing data it will always pick the correct data from the tables.
Is this what you want?
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Author Comment

by:ayha1999
ID: 35069976
Even a View is ok as long as I can bind a dagrid from the View. could you please give the complete sql script?
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Accepted Solution

by:
madgino earned 200 total points
ID: 35070603
You have attached the code for creating the view.
You can bind the datagrid to it but it won't editable, it's just for displaying data.
CREATE VIEW [dbo].[View1]
AS
SELECT   id, name FROM         dbo.Table1
union 
SELECT   id, name FROM         dbo.Table2

GO

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Author Closing Comment

by:ayha1999
ID: 35083186
thanks
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