Table 1-2 lists the system-supplied datatypes and their synonyms and provides information about the range of valid values and storage size for each. For simplicity, the datatypes are printed in lowercase characters, although Adaptive Server allows you to use either uppercase or lowercase characters for system datatypes. User-defined datatypes, such as timestamp, are case-sensitive. Most Adaptive Server-supplied datatypes are not reserved words and can be used to name other objects.
Datatypes by category |
Synonyms |
Range |
Bytes of storage |
|---|---|---|---|
Exact numeric: integers |
|||
bigint |
Whole numbers between 263 and -263 - 1 (from -9,223,372,036,854,775,808 to +9,223,372,036,854,775,807, inclusive. |
8 |
|
int |
integer |
231 -1 (2,147,483,647) to -231 (-2,147,483,648 |
4 |
smallint |
|
215 -1 (32,767) to -215 (-32,768) |
2 |
tinyint |
|
0 to 255 (Negative numbers are not permitted) |
1 |
unsigned bigint |
Whole numbers between 0 and 18,446,744,073,709,551,615 |
8 |
|
unsigned int |
Whole numbers between 0 and 4,294,967,295 |
4 |
|
unsigned smallint |
Whole numbers between 0 and 65535 |
2 |
|
Exact numeric: decimals |
|||
numeric (p, s) |
|
1038 -1 to -1038 |
2 to 17 |
decimal (p, s) |
dec |
1038 -1 to -1038 |
2 to 17 |
Approximate numeric |
|||
float (precision) |
|
machine dependent |
4 for default precision < 16, 8 for default precision >= 16 |
double precision |
|
machine dependent |
8 |
real |
|
machine dependent |
4 |
Money |
|||
smallmoney |
|
214,748.3647 to -214,748.3648 |
4 |
money |
922,337,203,685,477.5807 to -922,337,203,685,477.5808 |
8 |
|
Date/time |
|||
smalldatetime |
|
January 1, 1900 to June 6, 2079 |
4 |
datetime |
|
January 1, 1753 to December 31, 9999 |
8 |
date |
|
January 1, 0001 to December 31, 9999 |
4 |
time |
12:00:00AM to 11:59:59:999PM |
4 |
|
Character |
|||
char(n) |
character |
pagesize |
n |
varchar(n) |
character varying, char varying |
pagesize |
actual entry length |
unichar |
Unicode character |
pagesize |
n * @@unicharsize (@@unicharsize equals 2) |
univarchar |
Unicode character varying, char varying |
pagesize |
actual number of characters * @@unicharsize |
nchar(n) |
national character, national char |
pagesize |
n * @@ncharsize |
nvarchar(n) |
nchar varying, national char varying, national character varying |
pagesize |
@@ncharsize * number of characters |
text |
|
231 -1 (2,147,483,647) bytes or fewer |
0 when uninitialized; multiple of 2K after initialization |
unitext |
1 – 1,073,741,823 |
0 when uninitialized; multiple of 2K after initialization |
|
Binary |
|||
binary(n) |
|
pagesize |
n |
varbinary(n) |
|
pagesize |
actual entry length |
image |
231 -1 (2,147,483,647) bytes or fewer |
0 when uninitialized; multiple of 2K after initialization |
|
Bit |
|||
bit |
|
0 or 1 |
1 (one byte holds up to 8 bit columns) |
