What is byte data type in Oracle?
What is byte data type in Oracle?
Fixed-length character data of length size bytes or characters. Maximum size is 2000 bytes or characters. Default and minimum size is 1 byte. BYTE and CHAR have the same semantics as for VARCHAR2 . Both fixed-width and variable-width character sets are supported, both using the database character set.
What are Oracle data types?
A data type specifies a particular type of data, such as integer, floating-point, Boolean etc. A data type also specifies the possible values for that type, the operations that can be performed on that type and the way the values of that type are stored.
What is float data type in Oracle?
The Oracle FLOAT data type is the subtype of the NUMBER data type. Its main purpose is to facilitate compatibility with ANSI SQL FLOAT data types. You cannot specify the scale because Oracle Database interprets scale from the data. The maximum precision of FLOAT is 126.
How many bytes is a number in Oracle?
Table 3-1 Internal Oracle Datatypes
| Internal Oracle Datatype | Maximum Internal Length | Datatype Code |
|---|---|---|
| NUMBER | 21 bytes | 2 |
| LONG | 2^31-1 bytes (2 gigabytes) | 8 |
| ROWID | 10 bytes | 11 |
| DATE | 7 bytes | 12 |
When to use a byte or a char in Oracle?
If you don’t explicitly specify BYTE or CHAR followed the length, Oracle uses the BYTE by default. The default value of length is 1 if you skip it like the following example: When you insert or update a fixed-length character string column, Oracle stores the characters as the fixed-length data.
What are the different types of data in Oracle?
Oracle Built-In Data Types Code Data Type Description 1 VARCHAR2 ( size [ BYTE | CHAR ]) Variable-length character string having 1 NVARCHAR2 ( size ) Variable-length Unicode character string 2 NUMBER [ ( p
Where do I find the data type code in Oracle?
The codes listed for the data types are used internally by Oracle Database. The data type code of a column or object attribute is returned by the DUMP function. Variable-length character string having maximum length size bytes or characters. You must specify size for VARCHAR2. Minimum size is 1 byte or 1 character.
How big is the DATETIME data type in Oracle?
The size is 7 or 11 bytes, depending on the precision. This data type contains the datetime fields YEAR, MONTH, DAY, HOUR, MINUTE, and SECOND. It contains fractional seconds but does not have a time zone.