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Oracle SQL IN Operator AND OR

Hi,
I have the same list of text values which are being compared to two different fields using the IN operator. I get different results if i bracket the AND OR as per below. Which one should I be using?

SELECT * FROM TABLE
WHERE FIELDA IS NOT NULL
AND FIELDB IN (ETC,ETC)
OR FIELDC IN (ETC,ETC)

or

SELECT * FROM TABLE
WHERE FIELDA IS NOT NULL
AND
(FIELDB IN (ETC,ETC)
OR FIELDC IN (ETC,ETC))

Cheers,
Brett

Guy Hengel [angelIII / a3]

>I get different results if i bracket the AND OR as per below.
that is normal

>Which one should I be using?
depends on what result you want.

if you use AND, both fields must match, if you use OR, either field match will return the row.

brettanderson77

ASKER

Hi,

Thanks for the response yet the question is not around AND/OR specifically, it is around using brackets.

Both options are using AND and OR in a similar manner yet one has the two OR options bracketed to seperate it from the first condition.

Op 1:
Where Condition 1
AND Condition 2
OR Condition 3

Op 2:
Where Condition 1
AND
(Condition 2
OR Condition 3)

Hope you get my drift?

Cheers,
Brett

ASKER CERTIFIED SOLUTION

Guy Hengel [angelIII / a3]

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brettanderson77

ASKER

Great, thank you. So I think I was on the right track with using option 2 which will give me:

Condition 1 is true
AND
(Condition 2 OR 3 are true)

Let me know if i'm wrong!

Cheers,
Brett

Guy Hengel [angelIII / a3]

you got it!