Oracle 中的类型转换函数

带小数点的字符串（除小数点外其它的都是数字）转换成数值 TO_NUMBER Converts a string to the NUMBER data type TO_NUMBE

带小数点的字符串（除小数点外其它的都是数字）转换成数值

TO_NUMBER

Converts a string to the NUMBER data type TO_NUMBER([, , ]) RETURN NUMBER

CREATE TABLE test (
testcol VARCHAR2(10));

INSERT INTO test VALUES ('12345.67');

SELECT TO_BINARY_DOUBLE(testcol) BIN_DOUBLE, TO_BINARY_FLOAT(testcol) BIN_FLOAT, TO_NUMBER(testcol) NMBR
FROM test;

Converts a HEX number to FLOAT TO_NUMBER(, );

SELECT TO_NUMBER('0A', 'XX')
FROM dual;

Converts a HEX number to DECIMAL TO_NUMBER(,
'') RETURN ;

SELECT TO_NUMBER(100000,'XXXXXXXX')
FROM dual;

1.语法：TO_NUMBER(string[,format[,nlsparams]])
目的：将CHAR或VARCHAR2类型的string转换为一个NUMBER类型的数值，，如果指定了format,那么string应该遵循相应的数字格式。
2.范例
DECLARE
v_Num NUMBER;
BEGIN
v_Num := TO_NUMBER( '$12345.67 ', '$99999.99 ');
END;

Oracle UTL_RAW

General Information

Source {ORACLE_HOME}/rdbms/admin/utlraw.sql

First Available 7.3.4

Constants

Name Data Type Value

Dependencies 179 objects

SELECT name FROM dba_dependencies
WHERE referenced_name = 'UTL_RAW'
UNION
SELECT referenced_name FROM dba_dependencies
WHERE name = 'UTL_RAW';

Exceptions

Error # Name Description