oracle 删除用户，提示“无法删除当前已连接的用户”

1. 首先查询出该用户的登录情况，注意用户名必须是大写

        

SQL> select username,sid,serial# from v$session where username = 'XSTRMADMIN';

USERNAME                              SID    SERIAL#
------------------------------ ---------- ----------
SYS                                   136        530
SYS                                   137        328
SYSMAN                                138         12
UTEST                                 139       1098
SYSMAN                                140         12
                                      142         40
SYSMAN                                143         52
SYS                                   144       1023
SYS                                   148       2634
                                      152          4
                                      154          1
SYS                                   158        280 

2. 指定需删除的 SID和SERIAL#，然后删除连接

SQL> alter system kill session '139,1098';

3. 删除用户

drop user XSTRMADMIN cascade;