ORACLE大數(shù)據(jù)類型的操作之一CLOB
2024-08-29 13:30:40
供稿：網(wǎng)友
oracle大數(shù)據(jù)類型的操作之一clob
作者: ccbzzp
大家在應用oracle的時候, 可能經(jīng)常會用到對大數(shù)據(jù)類型的操作, 在這里我簡單的總結(jié)一下, 希望對大家能有所幫助! 也歡迎大家一起來探討, 以便共同進步, 共同發(fā)展!
本文對oracle的高手來說是不用看的.
1. 如何創(chuàng)建帶有clob類型字段的表?
create table test2 (aaa clob);
2. 如何對帶有clob類型字段的表增加記錄?
insert into test2 values('ccbzzpccbzzp');
3. 如何select帶有clob類型字段的表?
select * from test2;
select * from test2 where dbms_lob.instr(test2.aaa,'b',1,1)>0;
4. 如何對帶有clob類型字段的表更換表空間?
alter table test2 move tablespace users;
5. 如何exp帶有clob類型字段的表?
exp user/password file=a.dmp tables=(test2);
6. 如何imp帶有clob類型字段的表?
imp user/password file=a.dmp full=y;
7. 從哪個版本開始支持clob,blob等大字段?
8.0
以上測試環(huán)境為oracle92
sql*plus: release 9.2.0.1.0 - production on 星期四 9月 4 12:02:00 2003
copyright (c) 1982, 2002, oracle corporation. all rights reserved.
連線到:
oracle9i enterprise edition release 9.2.0.1.0 - production
with the partitioning, olap and oracle data mining options
jserver release 9.2.0.1.0 - production
sql> drop table test2;
drop table test2
*
error 在行 1:
ora-00942: 表格或視觀表不存在
sql> create table test2 (aaa clob);
已建立表格.
sql> insert into test2 values('ccbzzpccbzzp');
已建立 1 個資料列.
sql> select * from test2;
aaa
--------------------------------------------------------------------------------
ccbzzpccbzzp
sql> select * from test2 where dbms_lob.instr(test2.aaa,'b',1,1)>0;
aaa
--------------------------------------------------------------------------------
ccbzzpccbzzp
sql> alter table test2 move tablespace users;
已更改表格.
sql>
d:> exp test/test file=a.dmp tables=(test2)
......
export done in zht16big5 character set and zht16big5 nchar character set
about to export specified tables via conventional path ...
. . exporting table test2 0 rows exported
export terminated successfully without warnings.
sql> drop table test2;
已刪除表格.
d:> imp test/test file=a.dmp tables=(test2);
......
import done in zht16big5 character set and zht16big5 nchar character set
. importing test's objects into test
. . importing table "test2" 0 rows imported
import terminated successfully without warnings.
待續(xù)...
