查詢oracle 的客戶端 名字爲sql derveloper
下載地址
http://download.oracle.com/otn/java/sqldeveloper/sqldeveloper-4.0.2.15.21-no-jre.zip?AuthParam=1406099381_ba66702a11284845c5e6546391d95461
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即用戶名要大寫纔行。
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。
啓用外鍵約束的命令爲:
alter
table
table_name enable
constraint
constraint_name
禁用外鍵約束的命令爲:
alter
table
table_name disable
constraint
constraint_name
然後再用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/啓用外鍵和觸發器
--啓用腳本
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
;