Oracle大數据類型的操作之一CLOB

作者: CCBZZP


;大家在應用ORACLE的時候, 可能經常會用到對大數据類型的操作, 在這里我簡單的總結一下, 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, 共同發展!
本文對ORACLE的高手來說是不用看的.

1. 如何創建帶有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...