I have a legacy table that contains 'master' records and associated detail records. Detail records are identified by an addition to the master key of "-nnn". I need to find master records that have no detail records, tried several variations, and then finally broke it down to simplest elements.
This works:
select (select count(*) from dbo.client as cl2
where cl2.acct_no like (cl1.acct_no + '-%')) as countx, acct_no
from dbo.client as cl1
and displays the expected zero or non-zero results, depending on how many detail records there are.
However, when I try to use the count results to select only the records with zero detail records, like so:
select (select count(*) from dbo.client as cl2
where cl2.acct_no like (cl1.acct_no + '-%')) as countx, acct_no
from dbo.client as cl1
where countx = 0
I get an error: "Invalid column name 'countx'"
What am I missing here?
CountX is not a named column.
This may not be the most optimal way, but wrapping the entire query might work.
SELECT CountX, Acct_No
FROM
(
select (select count(*) from dbo.client as cl2
where cl2.acct_no like (cl1.acct_no + '-%')) as countx, acct_no
from dbo.client as cli
) As InnerQuery
where countx = 0
Edit
Looking at this, it may be better Accomplished using a Join, instead of that nested Select.
SELECT cl1.acct_no, Count(*)
FROM dbo.client cl1 --the master key numbers
INNER JOIN dbo.client cl2 --the sub-keys
ON cl1.acct_no NOT LIKE '%-%' --No dashes in the MasterKey
AND cl1.acct_no LIKE (cl2.acct_no + '-%')
GROUP BY cl1.acct_no
Try using in
to get what you want
select Acct_No from dbo.client where Acct_No not in
(
select acct_no from dbo.client where acct_no like acct_no + '-%'
)
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