Mir Sayeed Hassan Blog- Oracle DBA

How to drop the user who is connected to database by force Normally if you try to drop the user by using the sqlplus, it shows the below error: SQL> drop user mir cascade; ORA-01940: cannot drop a user that is currently connected If you are sure to drop this user, Verify by yourself & crosscheck with assign developer users. Once confirm, Fallow below procedure Syntax: Find the session for the user/schema select sid,serial# from v$session where username = '<user_schema>'; Example: SQL> select sid,serial# from v$session where username = 'MIR';        SID    SERIAL# ---------- ----------         41      13745 Syntax: To kill the user session alter system kill session '<sid>,<serial#>'; Example: SQL> alter system kill session ’41,13745’; System altered. Now Drop the user: SQL> drop user  mir cascade; User dropped. -------------------------------------He

Please find the Quick General query as per your requirement Find the status of the database SQL> select status from v$instance; STATUS ------------ OPEN SQL> select database_status from v$instance; DATABASE_STATUS ----------------- ACTIVE Or – To get the complete details of DB SQL> select * from v$instance; INSTANCE_NUMBER INSTANCE_NAME --------------- ---------------- HOST_NAME ---------------------------------------------------------------- VERSION           STARTUP_T STATUS       PAR    THREAD# ARCHIVE LOG_SWITCH_WAIT ----------------- --------- ------------ --- ---------- ------- --------------- LOGINS     SHU DATABASE_STATUS   INSTANCE_ROLE      ACTIVE_ST BLO ---------- --- ----------------- ------------------ --------- ---               1 testdb testdb.local 11.2.0.4.0        17-AUG-17 OPEN         NO           1 STARTED ALLOWED    NO  ACTIVE            PRIMARY_INSTANCE   NORMAL    NO Find the uptim