4gl 找特定字串
l_cmad.cmad18 = 'FC040-06'
SELECT instr(l_cmad.cmad18,'-') INTO l_cnt2 FROM dual
經SELECT後 l_cnt2 = 6
LET l_month = l_cmad.cmad18[l_cnt2+1,l_cnt2+3]
取月份 l_month = 06
SELECT instr(l_cmad.cmad18,'-') INTO l_cnt2 FROM dual
經SELECT後 l_cnt2 = 6
LET l_month = l_cmad.cmad18[l_cnt2+1,l_cnt2+3]
取月份 l_month = 06