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You will need to run 2 separate SQL statements

update PRE_CASE as A set (A.PATIENT_NAME) = select COALESCE(B.PATIENT_NAME,
A.PATIENT_NAME) from DEMOGRAPHIC as B
where A.MEDICAL_RECORD_NO  = B.MEDICAL_RECORD_NO

then run a second one but substitute POST_CASE for PRE_CASE



Alan Shore

NBTY, Inc
(631) 244-2000 ext. 5019
AShore@xxxxxxxx

midrange-l-bounces@xxxxxxxxxxxx wrote on 03/08/2007 04:05:47 PM:

This isn't a midrange specific question.  But, it is SQL, so I
thought somebody
with more SQL knowledge could offer a suggestion.

This is MS-SQL.

I have three tables.  There are common columns between the three tables.

The common fields are MEDICAL_RECORD_NO and PATIENT_NAME

The main table is DEMOGRAPHIC, where all name corrections have been
performed.

The other two tables have subtle changes in the name field.


What would the SQL statement be to update the PATIENT_NAME columns in
PRE_CASE
and POST_CASE tables, from DEMOGRAPHIC table, where
MEDICAL_RECORD_NO is equal?

I am assuming that a WHERE could also be applied where only a specific
MEDICAL_RECORD_NO  from DEMOGRAPHIC would be used.

I could see running this as two separate UPDATE operations.  Might even
be
preferable.

Thanks for any assistance.

John McKee

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