Oracle dbtimezone與os時區(qū)不一致的解決辦法

發(fā)布時間: 2012/9/11 17:21:56

Connected to Oracle Database 10g Enterprise Edition Release 10.1.0.2.0
Connected as sys
          //查看數(shù)據(jù)庫時區(qū)   -

SQL> select dbtimezone from dual;
DBTIMEZONE
----------
+00:00
          //查看當(dāng)前時間和時區(qū)
SQL> select systimestamp from dual;
SYSTIMESTAMP
--------------------------------------------------------------------------------
12-4月 -11 02.39.49.421000 下午 +08:00
          //我明明是在東8區(qū)，怎么數(shù)據(jù)庫時區(qū)顯示為0呢？
SQL> alter database set time_zone='+8:00';
ORA-30079: cannot alter database timezone when database has TIMESTAMP WITH LOCAL TIME ZONE columns
          //從錯誤提示，我們可以看出數(shù)據(jù)庫中一些表的列的數(shù)據(jù)類型為:TIMESTAMP WITH LOCAL TIME ZONE
          //我們得將這些列刪除后，才能更改，下面我們來查找這些類。
SQL> select u.name||'.'||o.name||'.'||c.name tsltz_column
2 from sys.obj$ o,sys.col$ c,sys.user$ u
3 where c.type#=231 and
4        o.obj#=c.obj# and
5        u.user#=o.owner#;
TSLTZ_COLUMN
--------------------------------------------------------------------------------
OE.ORDERS.ORDER_DATE
          //我們找到了，是oe用戶下orders表下的列order_date。
SQL> desc oe.orders;
Name         Type                              Nullable Default Comments
------------ --------------------------------- -------- ------- -----------------------------------------------------------
ORDER_ID     NUMBER(12)                                         PRIMARY KEY column.
ORDER_DATE   TIMESTAMP(6) WITH LOCAL TIME ZONE                  TIMESTAMP WITH LOCAL TIME ZONE column, NOT NULL constraint.
ORDER_MODE   VARCHAR2(8)                       Y                CHECK constraint.
CUSTOMER_ID NUMBER(6)
ORDER_STATUS NUMBER(2)                         Y                0: Not fully entered, 1: Entered, 2: Canceled - bad credit,-
3: Canceled - by customer, 4: Shipped - whole order, -
5: Shipped - replacement items, 6: Shipped - backlog on items, -
7: Shipped - special delivery, 8: Shipped - billed, 9: Shipped - payment plan,-
10: Shipped - paid
ORDER_TOTAL NUMBER(8,2)                       Y                CHECK constraint.
SALES_REP_ID NUMBER(6)                         Y                References hr.employees.employee_id.
PROMOTION_ID NUMBER(6)                         Y                Sales promotion ID. Used in SH schema
          //將其刪除
SQL> alter table oe.orders drop column order_date;
Table altered
          //這樣我們才可以修改時區(qū)
SQL> alter database set time_zone='+8:00';
Database altered
          //關(guān)閉數(shù)據(jù)庫
          //SHUTDOWN is not an SQL command, it is an SQL*Plus command.
SQL> shutdown immediate;
Database closed.
Database dismounted.
Oracle instance shut down.
          //啟動數(shù)據(jù)庫
SQL> startup;
Oracle instance started.
Total System Global Area     171966464 bytes
Fixed Size                     7877988 bytes
Variable Size                145488364 bytes
Database Buffers              25165824 bytes
Redo Buffers                    524288 bytes
Database mounted.
Database opened.
         //查看時區(qū)
SQL> select dbtimezone from dual;
DBTIMEZONE
----------
+08:00