Compare cells in a row in two tables

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Compare cells in a row in two tables

Author

Topic

riesbrink
Starting Member

1 Post

Posted - 2012-02-08 : 09:31:09

Hi

I am trying to compare the values in two rows, just to make clear they are the same row from the same table on is in a TempTable just before the row is updated and the other from the updated row, what I am looking to do is to compare the values of the cells in the rows to see what has been updated in the row.

select * into #myTemp from tUsers where UID = @UID
select * from tUsers where UID = @UID

CREATE TABLE dbo.tUserChanges
(
cID int IDENTITY (1,1),
cChangeDate DateTime,
cValueChanged varchar(30),
cPreviousValue bit,
cCurrentValue bit
)

So what I need to do is compare is columns cell value to the other tables values and insert in into the tUserChanges table when they are different

Thanks your help will be appreciated

webfred
Master Smack Fu Yak Hacker

8781 Posts

Posted - 2012-02-08 : 09:42:28

It would be nice to have sample tables and sample data...

something like this:

select
id,
case when t1.col1 <> t2.col1 then 'changed' else 'equal' end as WhatHappened,
t1.col1 as t1Col1,
t2.col1 as t2Col1
from TempTable t1
join OrgTable t2 on t2.id = t1.id

No, you're never too old to Yak'n'Roll if you're too young to die.

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2012-02-08 : 14:13:49

quote:
Originally posted by riesbrink

Hi

I am trying to compare the values in two rows, just to make clear they are the same row from the same table on is in a TempTable just before the row is updated and the other from the updated row, what I am looking to do is to compare the values of the cells in the rows to see what has been updated in the row.

select * into #myTemp from tUsers where UID = @UID
select * from tUsers where UID = @UID

CREATE TABLE dbo.tUserChanges
(
cID int IDENTITY (1,1),
cChangeDate DateTime,
cValueChanged varchar(30),
cPreviousValue bit,
cCurrentValue bit
)

So what I need to do is compare is columns cell value to the other tables values and insert in into the tUserChanges table when they are different

Thanks your help will be appreciated

compare based on what?
you need to define for us key columns based on which we need to compare and also columns which needs to be looked for the changes.
as per above selected both tables will have same data

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

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