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Reverse IN query
2

Reverse IN query

Reverse IN query

(OP)
Table definition
tblFoo
x varchar

tblFoo
------
x
------
abc
def
ghi

I have a string like 'abc,def,ghi,jkl'
and I want to say return for me everything in
this string that is not in tblFoo. So basically
the reverse of:

SELECT *
FROM tblFOO
WHERE x NOT IN ('abc,def,ghi,jkl');


Ultimately I would be looking for the result to say jkl in this instance as it is in my string but not in tblFoo.

Thanks in advance for replies.

 

RE: Reverse IN query

What you need to do is to have a function that would return your string, split by ',', as a table. You can also do it in-line in your SQL if you wish, but essentially it should be something like this:

If your string is 'abc, def, ghi, jkl', then your logic would form a table having abc, def, ghi, jkl as values. Let's call this temp_table with 'y' as a column.

After you have this table you can do:

select * from temp_table where y not in (select x from tblFoo)

 

RE: Reverse IN query

an effective solution here is probably not ANSI SQL

you'd be better off re-posting this question in the forum for your particular database system

for example, in MySQL you can say

   ... WHERE FIND_IN_SET(x,'abc,def,ghi,jkl') = 0

but FIND_IN_SET works ~only~ in MySQL

 

r937.com | rudy.ca
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RE: Reverse IN query

(OP)
The gods are smiling, MySQL is the db vendor :)

Thanks for replies

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