SQL create table datatype_test_raw(paddr raw(8)); Table created SQL insert into datatype_test_raw(paddr) values(utl_raw.cast_to_raw('This is a raw type test!')); insert into datatype_test_raw(paddr) values(utl_raw.cast_to_raw('This is a raw

SQL> create table datatype_test_raw(paddr raw(8));

Table created

SQL> insert into datatype_test_raw(paddr) values(utl_raw.cast_to_raw('This is a raw type test!'));

insert into datatype_test_raw(paddr) values(utl_raw.cast_to_raw('This is a raw type test!'))

ORA-01401: inserted value too large for column

SQL> alter table datatype_test_raw modify paddr raw(20);

Table altered

SQL> insert into datatype_test_raw(paddr) values(utl_raw.cast_to_raw('This is a raw type test!'));

insert into datatype_test_raw(paddr) values(utl_raw.cast_to_raw('This is a raw type test!'))

ORA-01401: inserted value too large for column

SQL> insert into datatype_test_raw(paddr) values(utl_raw.cast_to_raw('This is a raw test!'));

1 row inserted

SQL> commit;

Commit complete

SQL> select * from datatype_test_raw;

PADDR
----------------------------------------
54686973206973206120726177207465737421

SQL> select utl_raw.cast_to_varchar2(paddr) from datatype_test_raw;

UTL_RAW.CAST_TO_VARCHAR2(PADDR
--------------------------------------------------------------------------------
This is a raw test!

SQL> insert into datatype_test_raw(paddr) values(utl_raw.cast_to_raw('中文測試'));

1 row inserted

SQL> commit;

Commit complete

SQL> select utl_raw.cast_to_varchar2(paddr) from datatype_test_raw;

UTL_RAW.CAST_TO_VARCHAR2(PADDR
--------------------------------------------------------------------------------
This is a raw test!
中文測試

SQL> select paddr, utl_raw.cast_to_varchar2(paddr) from datatype_test_raw;

PADDR UTL_RAW.CAST_TO_VARCHAR2(PADDR
---------------------------------------- --------------------------------------------------------------------------------
54686973206973206120726177207465737421 This is a raw test!
D6D0CEC4B2E2CAD4 中文測試

這里用到了兩個函數(shù)：
utl_raw.cast_to_raw([varchar2]);--將varchar2轉(zhuǎn)換為raw類型
utl_raw.cast_to_varchar2([raw]);--將raw轉(zhuǎn)換為varchar2類型
這里varchar2的字符集一般是GB2312。

另外：
utl_raw包的幾個其他的函數(shù)用法：
utl_raw.cast_from_number([number]);
utl_raw.cast_to_number([number]);
位操作：
utl_raw.bit_or();
utl_raw.bit_and();
utl_raw.bit_xor();

另外還有轉(zhuǎn)換函數(shù)：
hextoraw(); --將對應(yīng)16進(jìn)制數(shù)轉(zhuǎn)換為raw

當(dāng)使用HEXTORAW時，會把字符串中數(shù)據(jù)當(dāng)作16進(jìn)制數(shù)。而使用UTL_RAW.CAST_TO_RAW時，直接把字符串中每個字符的ASCII碼存放到RAW類型的字段中