错误的写法:
update yz_seqno set order_no = (tran_brch,4,8) + substr(to_char(plat_date,'yyyymmdd'),5,8) + substr(order_no,10,12)
正确的应该是:
update yz_seqno set order_no = (tran_brch,4,8)
|| substr(to_char(plat_date,'yyyymmdd'),5,8)
|| substr(order_no,10,12)