Chapter 1: System and User-Defined Datatypes

Integer types

Adaptive Server provides the following exact numeric datatypes to store integers: bigint, int (or integer), smallint, tinyint and each of their unsigned counterparts. Choose the integer type based on the expected size of the numbers to be stored. Internal storage size varies by type, as shown in Table 1-6.

**Table 1-6: Integer datatypes**
Datatype	Stores	Bytes of storage
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[eger]	Whole numbers between-2³¹ and 2³¹ - 1 (-2,147,483,648 and 2,147,483,647), inclusive.	4
smallint	Whole numbers between -2¹⁵ and2¹⁵-1 (-32,768 and 32,767), inclusive.	2
tinyint	Whole numbers between 0 and 255, inclusive. (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 65,535	2

Entering integer data

Enter integer data as a string of digits without commas. Integer data can include a decimal point as long as all digits to the right of the decimal point are zeros. The smallint, integer, and bigint datatypes can be preceded by an optional plus or minus sign. The tinyint datatype can be preceded by an optional plus sign.

Table 1-7 shows some valid entries for a column with a datatype of integer and indicates how isql displays these values:

**Table 1-7: Valid integer values**
Value entered	Value displayed
2	2
+2	2
-2	-2
2.	2
2.000	2

Table 1-8 lists some invalid entries for an integer column:

**Table 1-8: Invalid integer values**
Value entered	Type of error
2,000	Commas not allowed.
2-	Minus sign should precede digits.
3.45	Digits to the right of the decimal point are nonzero digits.

View this book as PDF