Can I use a reference WITH clause in a JOIN?
Is the syntactically correct query?
WITH abc AS
(
SELECT a.col1 d,
e a.col2
substr(a.Col1,2) f
FROM table1 a JOIN
Table 1 b ON a.col1 = b.col1
WHERE a.col2! = b.col2
)
SELECT id, name, date of birth, ssn
FROM table3 LEFT OUTER JOIN (SELECT DISTINCT abc.d of ABC WHERE abc.f = 'EF') / * Please note the addition of the WHERE clause in the veiw inline * /.
ON table3.id = abc.d
I try to use "abc" with a JOIN. Are there restrictions WITH clause?
Thank you!
Post edited by: user11951344
Hello
user11951344 wrote:
I apologize I addded the WHERE clause too in mode inline "abcd" (in your query) to understand the purpose. The purpose of doing an OUTER JOIN of "abc" with table3 is to check the "EF" State = abc.f. Please note the Add where clause to update in my original question now.
I see the changes, but everything in #5 response still applies. There is no need to make a join in this case. The output depends entirely on table3. You will get the same results no matter what, if anything it either, is in table1, so any reference to table1 does that complicate the query and makes probably slower.
Tags: Database
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