oralce 21c 설치 환경변수

sql19.cmd
=========
set ORACLE_SID=db19
set ORACLE_HOME=C:\oracle\product\19
set PATH=C:\oracle\product\19\bin;%PATH%
sqlplus scott/tiger@db19_pdb1 

sql21.cmd
=========
set ORACLE_SID=db21
set ORACLE_HOME=(설치 경로)\product\21c\dbhomeXE
set LD_LIBRARY_PATH=(설치 경로)\product\21c\dbhomeXE\lib
set TNS_ADMIN=(설치 경로)\product\21c\homes\OraDB21Home1\network\admin
set PATH=C:\oracle\product\21\bin;%PATH%

path=(설치 경로)\product\21c\dbhomeXE\bin

sqlplus scott/tiger@db21_pdb1