I have the following query:
Code:
UPDATE STAYSPEC SET date_out =
CASE WHEN EXISTS
(SELECT *
FROM STAYSPEC AS STAYSPEC2
WHERE (STAYSPEC2.STAYNUM = STAYSPEC.STAYNUM) AND
(STAYSPEC2.ORDER_SPEC = STAYSPEC.ORDER_SPEC+1))
THEN
(SELECT date_in FROM STAYSPEC AS STAYSPEC3
WHERE (STAYSPEC3.STAYNUM = STAYSPEC.STAYNUM)
AND (STAYSPEC3.ORDER_SPEC = STAYSPEC.ORDER_SPEC+1))
ELSE
(SELECT STAYHOSP.date_out FROM STAYHOSP
WHERE (STAYHOSP.STAYNUM = STAYSPEC.STAYNUM))
END;
date_in and date_out have both the type TEXT.
So I need, for every record in STAYSPEC, to find another record in STAYSPEC
that has the same STAYNUM field and an ORDER_SPEC field that is 1 more. I
want to replace the date_out from STAYSPEC with that date (in text format).
If such a record does not exist (EXISTS) then it needs to take the date_out
from the STAYHOSP table where the STAYNUM is the same.
Whenever I execute the above query it doesn't give an error or something,
it's just keeps running without ever stopping ! Since it's quite hard to
debug this I sincerely hope someone can help me with this.
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