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Update a table from another table

Posted on 2009-07-06
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Last Modified: 2012-05-07
Hi,

I have 2 tables

TableOne  :

1. FromWarehouse
2. ToWarehouse
3. Qty


TableTwo :

1. Warehouse
2. QtyIn
3. QtyOut

Sample:

TableOne:

FromWarehouse    ToWarehouse   Qty
A                             B                       10

TableTwo:

Warehouse    QtyIn     QtyOut
A                     0             10
B                     10           0

How to update TableTwo using TableOne?

Thank you.



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Comment
Question by:emi_sastra
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14 Comments
 
LVL 75

Expert Comment

by:Aneesh Retnakaran
ID: 24785893
Update t2
SET QtyOut = QtyOut + qty
FROM table2 t2 INNER JOIN Table1 t1 on t1.FromWarehouse     = t2.wareHouse

Update t2
SET QtyOut = QtyOut + qty
FROM table2 t2 INNER JOIN Table1 t1 on t1.ToWarehouse   = t2.wareHouse
0
 
LVL 17

Expert Comment

by:pssandhu
ID: 24785896
UPDATE TableTwo
SET  OtyOut = Qty
FRom   TableTwo t INNER JOIN TableOne g
              ON t.Warehouse = g.FromWareHouse
UPDATE TableTwo
SET  OtyIn = Qty
FRom   TableTwo t INNER JOIN TableOne g
              ON t.Warehouse = g.ToWareHouse
0
 
LVL 57

Expert Comment

by:Raja Jegan R
ID: 24785897
Hope this helps.
Kindly specify the columns and details so that exact query can be given
udpate table2

set QtyIn = t1.

from table1 t1, table2 t2

where t2.Warehouse = t1.FromWarehouse

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0
 
LVL 1

Author Comment

by:emi_sastra
ID: 24786018
Hi All,

I am so sorry, I should mentioned Insert, not Update, since the rows of data could change.
Usually I delete the transaction first then insert it.

Please see my revised table.

TableOne  :

1. TrsId
2. FromWarehouse
3. ToWarehouse
4. ProductCode
5. Qty


TableTwo :

1. TrsId
2. Warehouse
3. ProductCode
4. QtyIn
5. QtyOut

Sample:

TableOne:

TrsId  FromWarehouse    ToWarehouse   ProductCode   Qty
001    A                             B                      CocaCola         10

TableTwo:

TrsId  Warehouse    ProductCode  QtyIn     QtyOut
001    A                     CocaCola       0             10
001    B                     CocaCola       10           0

Thank you.

0
 
LVL 40

Expert Comment

by:Sharath
ID: 24786025
<< How to update TableTwo using TableOne? >>
which column you want to update and with what value?
0
 
LVL 1

Author Comment

by:emi_sastra
ID: 24786066
Hi Sharath_123,

Please see my last post Id 24786018

Thank you.

0
 
LVL 40

Expert Comment

by:Sharath
ID: 24786109
We both were posting at the same time, hence i missed your last post. so do you want to insert data into second table based on the data in the first table?
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LVL 17

Assisted Solution

by:pssandhu
pssandhu earned 200 total points
ID: 24786130
Something like this:
INSERT INTO TableTwo (TrsID, Warehouse, ProductCode, QtyOut)
Select TrsID, FromWarehouse, ProductCode, Qty)
INSERT INTO TableTwo (TrsID, Warehouse, ProductCode, QtyIn)
Select TrsID, ToWarehouse, ProductCode, Qty)
0
 
LVL 1

Author Comment

by:emi_sastra
ID: 24786145
Hi Sharath_123,

Yes.
0
 
LVL 1

Author Comment

by:emi_sastra
ID: 24786235
Hi pssandhu,


It needs two query to solve this. Correction, you miss the "From TableOne" clause.
Is there any other way to do it?

Thank you.
0
 
LVL 40

Expert Comment

by:Sharath
ID: 24786250
try this
insert into TableTwo

select TrsId,FromWarehouse as WareHouse,ProductCode,0 as QtyIn,Qty as QtyOut from TableOne

union all

select TrsId,FromWarehouse as WareHouse,ProductCode,Qty as QtyIn,0 as QtyOut from TableOne

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LVL 40

Accepted Solution

by:
Sharath earned 300 total points
ID: 24786271
typo in previous post
insert into TableTwo

select TrsId,FromWarehouse as WareHouse,ProductCode,0 as QtyIn,Qty as QtyOut from TableOne

union all

select TrsId,ToWarehouse as WareHouse,ProductCode,Qty as QtyIn,0 as QtyOut from TableOne

Open in new window

0
 
LVL 17

Expert Comment

by:pssandhu
ID: 24786279
Yes you can use the union clause to achive that as shown by sharath_123 above.
P.
0
 
LVL 1

Author Comment

by:emi_sastra
ID: 24786327
Hi pssandhu,

Yes, I prefer Sharath_123 method.

Thank you very much for your help.
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