ORACLE大數(shù)據(jù)類型的操作之一CLOB
2024-08-29 13:49:14
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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)...
