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Change Data in column

Author

Topic

jere1972
Starting Member

2 Posts

Posted - 2014-02-24 : 13:31:19

Need some help on how to modify/change data that is in a SQL table column.
Here is what I need or have
I have 2 tabels, Table 1 and Table 2, within those 2 tables there is 1 Column that has the same column heading aswell as data within,(I will call it the serial_number column) there is also a 2nd column that is labeled the Same in both tables, I would like to be able to update the Values in the 2nd column of table 1 with the values from table 2 column 3, using the Serial_number colume as my matching reference between the 2, the data is not in the same order between the 2 Tables,
More or less I need to set the value of table 1/column 2 to match table 2/column 3, where the serial_numbers are the same in both tables serial_number columns, the data being changed is set as Small int...
Any help anyone can provide would be extremely Appreciated, as my working knowledge of Sql Scripting is at a close 0

TG
Master Smack Fu Yak Hacker

6065 Posts

Posted - 2014-02-24 : 15:09:19

Just JOIN the two tables on serial_number and do the update:
something like this:


update t2 set
       t2.col3 = t1.col2
from   table1 t1
inner join table2 t2
       on t2.serial_number = t1.serial_number

EDIT:
FYI - it is always a good idea to SELECT the data first just as a reality check so you can see what you are about to update.


--update t2 set
--       t2.col3 = t1.col2
SELECT t1.serial_number, t2.col3, t1.col2
from   table1 t1
inner join table2 t2
       on t2.serial_number = t1.serial_number

Another safety check is to first BEGIN TRAN
then check the results - if you don't like it then: ROLLBACK TRAN
if you do like the results then: COMMIT TRAN

Be One with the Optimizer
TG

maggie21620
Starting Member

27 Posts

Posted - 2014-02-24 : 16:15:16

can you help with this, not sure where to put the column or even if that is the right command

--COLUMN PPVTotal FORMAT $99,990
SELECT
adHock.dbo.PPVVINCE$.Corps, adHock.dbo.PPVVINCE$.House, adHock.dbo.PPVVINCE$.Cust,
SUM(PPV_TOTAL) AS PPVTotal

FROM adHock.dbo.PPVVINCE$ INNER JOIN
IDST_74_CUSTOMER ON adHock.dbo.PPVVINCE$.Corps = IDST_74_CUSTOMER.ACCTCORP AND
adHock.dbo.PPVVINCE$.House = IDST_74_CUSTOMER.HOUSE AND adHock.dbo.PPVVINCE$.Cust = IDST_74_CUSTOMER.CUST

GROUP BY adHock.dbo.PPVVINCE$.Corps, adHock.dbo.PPVVINCE$.House, adHock.dbo.PPVVINCE$.Cust
ORDER BY PPVTota

none

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2014-02-27 : 02:54:01

quote:
Originally posted by maggie21620

can you help with this, not sure where to put the column or even if that is the right command

--COLUMN PPVTotal FORMAT $99,990
SELECT
adHock.dbo.PPVVINCE$.Corps, adHock.dbo.PPVVINCE$.House, adHock.dbo.PPVVINCE$.Cust,
SUM(PPV_TOTAL) AS PPVTotal

FROM adHock.dbo.PPVVINCE$ INNER JOIN
IDST_74_CUSTOMER ON adHock.dbo.PPVVINCE$.Corps = IDST_74_CUSTOMER.ACCTCORP AND
adHock.dbo.PPVVINCE$.House = IDST_74_CUSTOMER.HOUSE AND adHock.dbo.PPVVINCE$.Cust = IDST_74_CUSTOMER.CUST

GROUP BY adHock.dbo.PPVVINCE$.Corps, adHock.dbo.PPVVINCE$.House, adHock.dbo.PPVVINCE$.Cust
ORDER BY PPVTota

none

this looks different from your initial explanation
So which is the field you want to compare on? I see more than 1 fields in comparison here
ALso which field need to update? Why are you using GROUP BY?? I cant see anything whch speaks about aggregation in your explanation.

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