I am need to lookup the email address or login in table A along with
it's corresponding userid in the same table. I then need to take that
userid, and search for it in table B. Since I am searching for a
number of email addresses, I was trying to use IN to create a group.
My original query looked like this:

SELECT tableA.mail, tableA.login, tableA.userid, tableB.firmname,
tableB.address, tableB.phone, tableB.userid FROM `tableA`,`tableB`
WHERE tableA.mail IN (`email1@email.com`, `email2@email.com`,
`email3@email.com`) OR tableA.login IN (`email1@email.com`,
`email2@email.com`, `email3@email.com`)

Then I tried a JOIN version:

SELECT `userid`, tableB.firmname, `tableB.address`, `tableB.phone`,
FROM `tableA` JOIN `tableB` ON (tableB.userid=tableA.userid) WHERE
tableB.userid=tableA.userid)

I just need to be able to find the userid of an email address in table
A and then lookup that userid in table B. Your help is appreciated.

Jerim79 wrote:
> I am need to lookup the email address or login in table A along with
> it's corresponding userid in the same table. I then need to take that
> userid, and search for it in table B. Since I am searching for a
> number of email addresses, I was trying to use IN to create a group.
> My original query looked like this:
>
> SELECT tableA.mail, tableA.login, tableA.userid, tableB.firmname,
> tableB.address, tableB.phone, tableB.userid FROM `tableA`,`tableB`
> WHERE tableA.mail IN (`email1@email.com`, `email2@email.com`,
> `email3@email.com`) OR tableA.login IN (`email1@email.com`,
> `email2@email.com`, `email3@email.com`)
>
> Then I tried a JOIN version:
>
> SELECT `userid`, tableB.firmname, `tableB.address`, `tableB.phone`,
> FROM `tableA` JOIN `tableB` ON (tableB.userid=tableA.userid) WHERE
> tableB.userid=tableA.userid)
>
> I just need to be able to find the userid of an email address in table
> A and then lookup that userid in table B. Your help is appreciated.
>
your join sql does not look right. can you try something like this:

SELECT
tableA.userid,
tableB.firmname,
tableB.address,
tableB.phone

FROM `tableA` JOIN `tableB`
ON (tableB.userid=tableA.userid)

WHERE
tableA.mail = 'email1@email.com'
OR tableA.login = 'email1@email.com'


alternatively you can do this if you have more than value you're looking
for:

SELECT
tableA.userid,
tableB.firmname,
tableB.address,
tableB.phone

FROM `tableA` JOIN `tableB`
ON (tableB.userid=tableA.userid)

WHERE
tableA.mail IN ('email1@email.com' , 'email2@email.com')
OR tableA.login IN ('email1@email.com', 'email2@email.com')