如何取出文件中指定行的相邻行

zhyuh

文件内容如下：
Table dropped.

drop table tmp_eden_flat_ord_cmpt
           *
ERROR at line 1:
ORA-00942: table or view does not exist



Commit complete.


Table created.
......
......

我想取出行ORA-00942: table or view does not exist 和该行前面的3行，请问有什么办法?

谢谢！

寂寞烈火

if you use GNU/Linux,then,try it:
grep -B3 'ORA' file

明月清风

还可以这样：

1. sed -n '1,/ORA/p' file|tail -4等效于grep -B3 "ORa" file
   
2. 
   
3. sed -n '/ORA/,$p' file|head -5等效于grep -A4 "ORA" file

复制代码