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Update Statement Creates Unwanted Nulls


Update Statement Creates Unwanted Nulls

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maricled
maricled
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Let's say xTest has 9 records and no nulls. xUpdate has 6 records. I am updating locations for 6 people. After I execute this statement, the remaining 3 records in xTest end up with nulls in location:

update xTest
set location = (select [location] from xUpdate
where xTest.name = xUpdate.name)

Why am I getting nulls? I don't get nulls if my xUpdate file is the full dataset with the correct values.
Lynn Pettis
Lynn Pettis
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Could you please post the DDL (CREATE TABLE statements) for the two tables? Also, how are the tables related?

Cool
Lynn Pettis

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Lynn Pettis
Lynn Pettis
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Also, give this code a try in a test environment.


update dbo.xTest set
location = xu.location
from
dbo.xTest xt
inner join dbo.xUpdate xu
on (xt.name = xu.name);



Cool
Lynn Pettis

For better assistance in answering your questions, click here
For tips to get better help with Performance Problems, click here
For Running Totals and its variations, click here or when working with partitioned tables
For more about Tally Tables, click here
For more about Cross Tabs and Pivots, click here and here
Managing Transaction Logs

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maricled
maricled
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I needed an inner join statement and forgot it. problem solved. thanks for jumping in anyway. :-P
maricled
maricled
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Lynn, you were right-on with the inner join. thanks.
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