关于sqlplus的简单概述

sqlplus

interactive and batch query tool that is installed with every oracle database installation

SQL*PLUS Environment Variables

ORACLE_HOME:specify where oracle software is installer,it is also userd by SQL*PLUS to specify where message files are located

ORACLE_SID :to specify the database instance,ptional to SQL*PLUS

PATH:to specify the path to search for executables and DLLs in windows,typically includes ORACLE_HOME/bin

TNS_ADMIN:specify the location of the tnsnames.ora file

LD_LIBRARY_PATH:specify the path used to search for libraies on unix and linux ,not applicable to windows

SQLPATH:specify the location of SQL scripts

the SQL Buffer

the sql buffer sotres the most recently enterd SQL command or PL/SQL block,the command or blcok remains in the buffer until replaced by the next SQL command or PL/SL block,can view the buffer contents with the LIST command

can excute the command or block in the sql buffer using the RUN or / (slash) commands,the difference is RUN display the command or block in the buffer before excuting it,/ without displaying it first

you can use SAVE command to save the contents in the SQL buffer into a file