SELECT DISTINCT *
FROM Tablea a
WHERE NOT EXISTS (
SELECT 1
FROM Tableb b
WHERE b.SSN = a.SSN
AND b.PKT = a.PKT
AND b.FICE_NBR = a.FICE_NBR
)
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden