相信使用过Linux下Oracle的各位都知道，方向键、退格键会出现乱码的情况，解决方案非常多，有改配置文件，还有安装rlwrap的，这些就不再列举。
但是，实际上谁愿意你在服务器上面随便装个wlwrap呢，即使你再怎么解释，管理员也是将信将疑的。既然如此，那就设法使用sqlplus本身的功能代替方向键和退格键的编辑功能吧。
sqlplus的常用功能列表如下：
废话少说现在开始吧：
（一）列出缓冲区list
SQL> help list LIST ---- Lists one or more lines of the most recently executed SQL command or PL/SQL block which is stored in the SQL buffer. Enter LIST with no clauses to list all lines. In SQL*Plus command-line you can also use ";" to list all the lines in the SQL buffer. The buffer has no command history list and does not record SQL*Plus commands. L[IST] [n | n m | n * | n LAST | * | * n | * LAST | LAST]
以下是示例代码
SQL> select 2 table_name , tablespace_name 3 from 4 tabs 5 / TABLE_NAME TABLESPACE_NAME ------------------------------ ------------------------------ TESTTABLE DCB_DATA BLUEBALL DCB_DATA PHASES DCB_DATA VOLUME DCB_DATA REDBALL DCB_DATA SQL> l 1 select 2 table_name , tablespace_name 3 from 4* tabs SQL> l 1 3 1 select 2 table_name , tablespace_name 3* from SQL> l 1 last 1 select 2 table_name , tablespace_name 3 from 4* tabs SQL> list 2 2* table_name , tablespace_name SQL> list * last 2 table_name , tablespace_name 3 from 4* tabs
符号 * 的含义是当前的焦点在哪里。
（二）替换第n行命令
将第n行的命令替换掉，可以这样写
示例代码如下
n commandText
SQL> list 1 select 2 table_name , tablespace_name 3 from 4* tabs SQL> 2 table_name SQL> list 1 select 2 table_name 3 from 4* tabs SQL> / TABLE_NAME ------------------------------ TESTTABLE BLUEBALL PHASES VOLUME REDBALL
（三）替换字符串
将当前行的字符串替换掉
示例代码如下
SQL> select 2 segment_nam, 3 bytes/1048576 MB 4 from 5 user_segment 6 / user_segment * ERROR at line 5: ORA-00942: table or view does not exist SQL> list 5 5* user_segment SQL> change /user_segment/user_segments/ 5* user_segments SQL> list 1 select 2 segment_nam, 3 bytes/1048576 MB 4 from 5* user_segments SQL> / segment_nam, * ERROR at line 2: ORA-00904: "SEGMENT_NAM": invalid identifier SQL> list 2 2* segment_nam, SQL> change /segment_nam/segment_name/ 2* segment_name, SQL> / SEGMENT_NAME MB ------------------------------ ---------- TESTTABLE 2 PK_VOLUME_VID 1 VOLUME 1 MPK_REDBALL 1 REDBALL 1 MPK_BLUEBALL 1 BLUEBALL 1 PHASES 1 8 rows selected. SQL> list 1 select 2 segment_name, 3 bytes/1048576 MB 4 from 5* user_segments SQL> list 3 3* bytes/1048576 MB SQL> change /bytes//1048576/bytes//1024 3* /1048576 MB SQL> list 1 select 2 segment_name, 3 /1048576 MB 4 from 5* user_segments SQL> list 3 3* /1048576 MB SQL> change /1048576/bytes//1024 KB/ 3* /bytes MB SQL> change /bytes MB / bytes//1024 KB/ SP2-0023: String not found. SQL> change /bytes MB/ bytes//1024 KB/ 3* / bytes SQL> SQL> SQL> select 2 segment_name, 3 bytes/1048576 MB 4 from 5 user_segments 6 / SEGMENT_NAME MB ------------------------------ ---------- TESTTABLE 2 PK_VOLUME_VID 1 VOLUME 1 MPK_REDBALL 1 REDBALL 1 MPK_BLUEBALL 1 BLUEBALL 1 PHASES 1 8 rows selected.
（四）在行后面追加文本
示例代码如下
SQL> select table_name 2 from 3 tabs 4 / TABLE_NAME ------------------------------ TESTTABLE BLUEBALL PHASES VOLUME REDBALL SQL> 1 1* select table_name SQL> append ,tablespace_name 1* select table_name,tablespace_name SQL> list 1 select table_name,tablespace_name 2 from 3* tabs SQL> / TABLE_NAME TABLESPACE_NAME ------------------------------ ------------------------------ TESTTABLE DCB_DATA BLUEBALL DCB_DATA PHASES DCB_DATA VOLUME DCB_DATA REDBALL DCB_DATA
最重要就是这几个了，其他不说也罢