----查詢oracle中所有用戶信息 ----1、查詢數據庫中的表空間名稱 ----1)查詢所有表空間 select tablespace_name from dba_tablespaces; select tablespace_name from user_tablespaces; ----2)查詢使用過的表空間 select distinct tablespace_name from dba_all_tables; select distinct tablespace_name from user_all_tables; ----2、查詢表空間中所有表的名稱 select * from dba_all_tables where tablespace_name = 'SYNC_PLUS_1' and owner='GDSDCZJ' ----3、查詢系統用戶 select * from all_users select * from dba_users ----4、查看當前連接用戶 select * from v$session ----5、查看當前用戶權限 select * from session_privs ----6、查看所有的函數和存儲過程 select * from user_source ----其中TYPE包括:PROCEDURE、FUNCTION ----7、查看表空間使用情況 select sum(Bytes_size) from ( select a.file_id "FileNo", a.tablespace_name "表空間", a.bytes/1024/1021/1024 Bytes_size, a.bytes - sum(nvl(b.bytes, 0)) "已用", sum(nvl(b.bytes, 0)) "空閑", sum(nvl(b.bytes, 0)) / a.bytes * 100 "空閑百分率" from dba_data_files a, dba_free_space b where a.file_id = b.file_id(+) group by a.tablespace_name, a.file_id, a.bytes order by a.tablespace_name ); ----------------------------------------------------- ----1.查看所有用戶: select * from dba_users; select * from all_users; select * from user_users; ----2.查看用戶或角色系統權限(直接賦值給用戶或角色的系統權限): select * from dba_sys_privs; select * from user_sys_privs; (查看當前用戶所擁有的權限) ----3.查看角色(只能查看登陸用戶擁有的角色)所包含的權限 sql>select * from role_sys_privs; ----4.查看用戶對象權限: select * from dba_tab_privs; select * from all_tab_privs; select * from user_tab_privs; ----5.查看所有角色: select * from dba_roles; ----6.查看用戶或角色所擁有的角色: select * from dba_role_privs; select * from user_role_privs; ----7.查看哪些用戶有sysdba或sysoper系統權限(查詢時需要相應權限) select * from V$PWFILE_USERS ----8.SqlPlus中查看一個用戶所擁有權限 SQL>select * from dba_sys_privs where grantee='username'; 其中的username即用戶名要大寫才行。 比如: SQL>select * from dba_sys_privs where grantee='TOM'; ----9、Oracle刪除指定用戶所有表的方法 select 'Drop table '||table_name||';' from all_tables where owner='要刪除的用戶名(注意要大寫)'; ----10、刪除用戶 drop user user_name cascade; 如:drop user SMCHANNEL CASCADE ----11、獲取當前用戶下所有的表: select table_name from user_tables; ----12、刪除某用戶下所有的表數據: select 'truncate table ' || table_name from user_tables; ----13、禁止外鍵 ----ORACLE數據庫中的外鍵約束名都在表user_constraints中可以查到。其中constraint_type='R'表示是外鍵約束。 ----啟用外鍵約束的命令為: alter table table_name enable constraint constraint_name ----禁用外鍵約束的命令為: alter table table_name disable constraint constraint_name ----然后再用SQL查出數據庫中所以外鍵的約束名: select 'alter table '||table_name||' enable constraint '||constraint_name||';' from user_constraints where constraint_type='R' select 'alter table '||table_name||' disable constraint '||constraint_name||';' from user_constraints where constraint_type='R' --14、ORACLE禁用/啟用外鍵和觸發器 --啟用腳本 SET SERVEROUTPUT ON SIZE 1000000 BEGIN for c in (select 'ALTER TABLE '||TABLE_NAME||' ENABLE CONSTRAINT '||constraint_name||' ' as v_sql from user_constraints where CONSTRAINT_TYPE='R') loop DBMS_OUTPUT.PUT_LINE(C.V_SQL); begin EXECUTE IMMEDIATE c.v_sql; exception when others then dbms_output.put_line(sqlerrm); end; end loop; for c in (select 'ALTER TABLE '||TNAME||' ENABLE ALL TRIGGERS ' AS v_sql from tab where tabtype='TABLE') loop dbms_output.put_line(c.v_sql); begin execute immediate c.v_sql; exception when others then dbms_output.put_line(sqlerrm); end; end loop; end; / commit; --禁用腳本 SET SERVEROUTPUT ON SIZE 1000000 BEGIN for c in (select 'ALTER TABLE '||TABLE_NAME||' DISABLE CONSTRAINT '||constraint_name||' ' as v_sql from user_constraints where CONSTRAINT_TYPE='R') loop DBMS_OUTPUT.PUT_LINE(C.V_SQL); begin EXECUTE IMMEDIATE c.v_sql; exception when others then dbms_output.put_line(sqlerrm); end; end loop; for c in (select 'ALTER TABLE '||TNAME||' DISABLE ALL TRIGGERS ' AS v_sql from tab where tabtype='TABLE') loop dbms_output.put_line(c.v_sql); begin execute immediate c.v_sql; exception when others then dbms_output.put_line(sqlerrm); end; end loop; end; / commit;