This Oracle tutorial explains how to use the Oracle / PLSQL CAST function with syntax and examples. The Oracle / PLSQL CAST function converts one datatype to another.
The Original Date column looks like a date, but it is really just character data. In contrast, the Converted Date column is a true date/time column, as evidenced by the time value, which is now shown. The equivalent statement for the previous CAST function in Oracle is: ...
Some functions in Oracle which are similar to the CAST function are: TO_NUMBER– This function converts a character value to a NUMBER data type. TO_CHAR– This function converts a number or date value to a CHAR data type. TO_DATE– This function converts a character value to a DATE-r...
The CAST function converts a value from one data type to another and provides a data type to a dynamic parameter (?) or a NULL value. CAST expressions are permitted anywhere expressions are permitted. Syntax CAST ( [ Expression | NULL | ? ] AS Datatype) The data type to which you ...
如下示例为在 Table Function 里使用 MULTISET 获取集合类型的结果。 obclient> CREATE OR REPLACE TYPE tbl_int AS TABLE OF INT; Query OK, 0 rows affected obclient> CREATE TABLE t1(c1 INT, c2 INT); Query OK, 0 rows affected obclient> CREATE TABLE t2(c1 INT, c2 INT); Query OK, 0 rows...
如下示例为在 Table Function 里使用MULTISET获取集合类型的结果。 obclient>CREATEORREPLACETYPEtbl_intASTABLEOFINT;Query OK,0rowsaffected obclient>CREATETABLEt1(c1INT,c2INT);Query OK,0rowsaffected obclient>CREATETABLEt2(c1INT,c2INT);Query OK,0rowsaffected obclient>INSERTINTOt1VALUES(1,1);Query OK...
Most major database management systems support the CAST function, including MySQL, PostgreSQL, SQL Server, Oracle, and SQLite. Can you cast a type to all other types in SQL? No, you cannot cast a data type to all other types in SQL. Data type conversions are limited to compatible types ...
Describes the CAST() function, which can be used to convert a value of any datatype to any other datatype.© 2025 Dr. Herong Yang. All rights reserved."CAST(value AS type)" - Returns the casted value of the specified value as the specified type. Examples of cast function, CastFuncti...
This function which calculate the number of a week in a month will work in a XML database when the cast is performed by the BI Server and will not work for an default Oracle Database configuration because the default format is 01-MAR-1998. mod(WEEK_OF_YEAR("D0 Time"."T00 Calendar ...
An rvalue of type “pointer to member of X of typeT1” can be explicitly converted to an rvalue of type “pointer to member ofYof typeT2” ifT1andT2are both function types or both object types. In all allowed cases, a null pointer of one type remains a null pointer when converted ...