Equals selection with a unique-weight sort sequence table (SRTSEQ(*LANGIDUNQ) LANGID(ENU)).
SELECT * FROM STAFF WHERE JOB = 'MGR'
When using the OPNQRYF command, specify:
OPNQRYF FILE((STAFF))
QRYSLT('JOB *EQ ''MGR''')
SRTSEQ(*LANGIDUNQ) LANGID(ENU)
DB2 UDB for AS/400 could use either index HEXIX or index UNQIX.