大数据类型的操作之CLOB
2024-07-21 02:33:55
供稿：网友
1. 如何创建带有CLOB类型字段的表? CREATE TABLE TEST2 (AAA CLOB);
2. 如何对带有CLOB类型字段的表增加记录?
INSERT INTO TEST2 VALUES('CCBZZPCCBZZP');
3. 如何SELECT带有CLOB类型字段的表?
SELECT * FROM TEST2;SELECT * FROM TEST2 WHERE
DBMS_LOB.INSTR(TEST2.AAA,'B',1,1)>0; 4. 如何对带有CLOB类型字段的表更换表空间?
ALTER TABLE TEST2 MOVE TABLESPACE USERS;
5. 如何EXP带有CLOB类型字段的表?
EXP USER/PASSWord FILE=A.DMP TABLES=(TEST2);
6. 如何IMP带有CLOB类型字段的表?
IMP USER/PASSWORD FILE=A.DMP FULL=Y; 7. 从哪个版本开始支持CLOB,BLOB等大字段?
以上测试环境为Oracle92
SQL*Plus: Release 9.2.0.1.0 - PRodUCtion on 星期四 9月 4 12:02:00 2003
Copyright ? 1982, 2002, Oracle Corporation. All rights reserved.
联机到:
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: 表格或视观表不存在
SQL> CREATE TABLE TEST2 (AAA CLOB); 已建立表格. SQL> INSERT INTO TEST2 VALUES('CCBZZPCCBZZP'); 已建立 1 个数据列. 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; 已删除表格. 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.
