How to update one-one row from Two table in Sql Server

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Dear Developer,

I have the two table "Tbl_ATemp" And "Tbl_BTemp"
I want to update first Table coloumn "B_Id" from ID of second table Tbl_BTemp.
The tran_id is same both table and ID coloumn is identity.
I will try cursor but not got result that i want

My table is....

Tbl_ATemp

Id Tran_Id B_Id
101 444 NULL
102 444 NULL
103 444 NULL
104 444 NULL

Tbl_BTemp

Id Tran_Id A_Id
1 444 NULL
2 444 NULL
3 444 NULL

After the Updating Table Tbl_Atemp I want to show Result as

Tbl_ATemp

Id Tran_Id B_Id
101 444 1
102 444 2
103 444 3
104 444 NULL

Its noncoff one - one record from both table and update coloumn.
Its greatful for me if any provide me quarry or any method to solved my quarry.

Regards,
Ravi Sharma

Posted 18-Jul-12 19:25pm

Ravi Sharma 2

Updated 18-Jul-12 19:40pm

v2

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Comments

Tejas Vaishnav 19-Jul-12 1:53am

is there any unique data column which is common to both a and b

so we can i identify this id is going to update with this particular record.

in above example all record in a and b have same 444 so it is quite confusing.

Ravi Sharma 2 19-Jul-12 2:09am

no there is no unique data coloum both table, thats challenging for me also.
there is multiple trans_Id in both table that i want to noncoff one -one row. This is solved by cursor ??

JakirBB 19-Jul-12 2:24am

So..How will you decide which Id from 2nd table will go which row of first table?

Ravi Sharma 2 19-Jul-12 2:27am

The first three rows of table is noncuff of first three second table of row and remaining if not match then its be null.this are done because i want to handle multiple transaction Id from my Reco system.

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JakirBB · Accepted Answer · 2012-07-18T21:34:00

Though it should not be a general scenario, I have devised a way. Hope it will solve your problem.

SQL

Select AId,BId
INTO #tmp
from
   (select Id as AId, ROW_NUMBER() over (order by Id) r from Tbl_ATemp) a
    join
   (select Id as BId, ROW_NUMBER() over (order by Id) r from Tbl_BTemp) b
    on a.r=b.r

UPDATE Tbl_ATemp
SET B_Id = #tmp.BId
FROM Tbl_ATemp INNER JOIN #tmp ON Tbl_ATemp.Id = #tmp.AId

DROP TABLE #tmp

Cheers :) ..