Selective Insert using Wildcard

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Selective Insert using Wildcard

bpowers

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Points: 5483
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October 25, 2013 at 1:02 pm

#279306

We are populating a new database (Company2) with the vendor data that is currently in the Company1 database, using the wildcard to pickup all the fields. However, there is one field (Division) that we would like to hard code in the insert statement. We thought about including it using a case statement, but we are not sure if that is the best approach. Any feedback would be greatly appreciated.
INSERT INTO Company2.dbo.CUSTVEND
SELECT *
,CASE WHEN DIVISION='DIV1' THEN 'DIV2' END
FROM Company1.dbo.CUSTVEND c1
WHERE c1.ACCTNO+c1.SUBC not in(SELECT DISTINCT ACCTNO+SUBC
FROM Company2.dbo.CUSTVEND)

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Bhuvnesh SSC Guru Points: 59351 More actions · Answer 1

try this

INSERT INTO Company2.dbo.CUSTVEND

SELECT *

,CASE WHEN DIVISION='DIV1' THEN 'DIV2' END

FROM Company1.dbo.CUSTVEND c1

WHERE not exists (SELECT 1 FROM Company2.dbo.CUSTVEND c2

where c2. ACCTNO = c1. ACCTNO and c1.SUBC= c2.SUBC )

-------Bhuvnesh----------
I work only to learn Sql Server...though my company pays me for getting their stuff done;-)

Dwain Camps SSC Guru Points: 86978 More actions · Answer 2

bpowers (10/25/2013)
We are populating a new database (Company2) with the vendor data that is currently in the Company1 database, using the wildcard to pickup all the fields. However, there is one field (Division) that we would like to hard code in the insert statement. We thought about including it using a case statement, but we are not sure if that is the best approach. Any feedback would be greatly appreciated.
INSERT INTO Company2.dbo.CUSTVEND
SELECT *
,CASE WHEN DIVISION='DIV1' THEN 'DIV2' END
FROM Company1.dbo.CUSTVEND c1
WHERE c1.ACCTNO+c1.SUBC not in(SELECT DISTINCT ACCTNO+SUBC
FROM Company2.dbo.CUSTVEND)

First of all, SELECT * means "all columns" and not "all columns except DIVISION." It looks to me like you're going to get a mismatch on the number of columns when you try to run the INSERT.

Secondly, there is never a reason to use DISTINCT in a sub-select where you're using IN or NOT IN. It just slows the query down.

Finally, what happens WHEN DIVISION <> 'DIV1'? Is your intent there to INSERT a NULL for the column?

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souLTower SSCarpal Tunnel Points: 4026 More actions · Answer 3

If this is a one time deal, why use *? If you already know the columns, you can simply add a case statement to the field you want to hard code.

Another approach would be to use select * into your target table, then use an update on that table:

UPDATE myTable, SET myField = 'MY HARD CODED VALUE' WHERE myField = myCondition