use a in a
use b in b exclusive
select b
index on f+g to tag xmzh
set order to tag xmzh
select a
copy to newfile_c for seek(c+d,'b')
应该是可以才对
select c,d,e,f,g from a,b where c=f and d=g
这个试试看,多了两个字段最后再删除
-------------------------
我流落在凄凉的世界里-孤苦伶仃
我过着动荡无助的生活-四处漂泊
select b
index on 姓名+帐号 to tag xmzh
set order to tag xmzh
select a
copy to newfile_c for seek(姓名+帐号,'b')
-------------------------
我流落在凄凉的世界里-孤苦伶仃
我过着动荡无助的生活-四处漂泊