[Oracle]大数据类型的操作之CLOB

　　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
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    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.