|
Conceptual data type |
DBMS-specific physical data type |
Content |
Length |
|---|
|
Integer |
int / INTEGER |
32-bit integer |
|
|
Short Integer |
smallint / SMALLINT |
16-bit integer |
|
|
Long Integer |
int / INTEGER |
32-bit integer |
|
|
Byte |
tinyint / SMALLINT |
256 values |
|
|
Number |
numeric / NUMBER |
Numbers with a fixed decimal point |
Fixed |
|
Decimal |
decimal / NUMBER |
Numbers with a fixed decimal point |
Fixed |
|
Float |
float / FLOAT |
32-bit floating point numbers |
Fixed |
|
Short Float |
real / FLOAT |
Less than 32-bit point decimal number |
|
|
Long Float |
double precision / BINARY DOUBLE |
64-bit floating point numbers |
|
|
Money |
money / NUMBER |
Numbers with a fixed decimal point |
Fixed |
|
Serial |
numeric / NUMBER |
Automatically incremented numbers |
Fixed |
|
Boolean |
bit / SMALLINT |
Two opposing values (true/false; yes/no; 1/0) |
|
|
Characters |
char / CHAR |
Character strings |
Fixed |
|
Variable Characters |
varchar / VARCHAR2 |
Character strings |
Maximum |
|
Long Characters |
varchar / CLOB |
Character strings |
Maximum |
|
Long Var Characters |
text / CLOB |
Character strings |
Maximum |
|
Text |
text / CLOB |
Character strings |
Maximum |
|
Multibyte |
nchar / NCHAR |
Multibyte character strings |
Fixed |
|
Variable Multibyte |
nvarchar / NVARCHAR2 |
Multibyte character strings |
Maximum |
|
Date |
date / DATE |
Day, month, year |
|
|
Time |
time / DATE |
Hour, minute, and second |
|
|
Date & Time |
datetime / DATE |
Date and time |
|
|
Timestamp |
timestamp / TIMESTAMP |
System date and time |
|
|
Binary |
binary / RAW |
Binary strings |
Maximum |
|
Long Binary |
image / BLOB |
Binary strings |
Maximum |
|
Bitmap |
image / BLOB |
Images in bitmap format (BMP) |
Maximum |
|
Image |
image / BLOB |
Images |
Maximum |
|
OLE |
image / BLOB |
OLE links |
Maximum |
|
Other |
|
User-defined data type |
|
|
Undefined |
undefined |
Not yet defined data type |
|