Your question doesn't make any sense.

If you have 10 records in TABLEA and 10 in TABLEB then what records do you want to compare by this condition "TABLEAVALUEA <> TABLEBVALUEA" ?

Also, do you want to see records when VALUEAs are equal or not equal?

"IF TABLEAVALUEA <> TABLEBVALUEA"

"on TABLEAVALUEA = TABLEBVALUEA"