I user query followed below.
SELECT OESHCH.SHIUNIQ, OESHCH.SHINUMBER
FROM OESHCH
WHERE OESHCH.SHIUNIQ NOT IN (SELECT SHIUNIQ FROM OESHCD)
INSERT INTO OESHCD select 256129 AS SHIUNIQ,DETAILNUM,AUDTDATE,AUDTTIME,
AUDTUSER,AUDTORG,SHINUMBER,QTYSHIPPED,PRICEUNIT,UNITCONV,
MOSTREC AS COST,MOSTREC...