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SQL Server

2008Data Types

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Data types are the most

fundamental constraintelement of a database in

that it restricts the rangeof possible values that

are allowed to be storedwithin a column.

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Numeric data

ne of the most commondata types that you will

!nd within SQL Serverare numeric data types.

There are ten numericdata types that ship withSQL Server 2008.

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" #our data types are

designed to store integervalues of various si$es.

" Two data types aredesigned to storemonetary data." Three data types aredesigned to store

decimal%based numbers

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Data Type Range of Value StorageSpace

tinyint 0 to 2&& ' byte

smallint %(2)*+8 to (2)*+* 2 bytesint %2(' to 2(' %' , bytes

bigint %2+( to 2+( %' 8 bytes

decimal-p)snumeric-p)s

%'0(8 to '0(8 %' & to '* bytes

smallmoney %2',)*,8.(+,8 to 2',)*,8.(+,* , bytes

money %/22)((*)20()+8&),**.&808 to/22)((*)20()+8&),**.&80*

8 bytes

real %(.,(8 to %'.'8(8 ) 0) and '.'8(8

to (.,(8, bytes

#loat %'.*/(08 to %2.2((08 ) 0) and2.2((08 to '.*/(08

, bytes or 8bytes

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Character data type

char-n % ' byte percharacter de!ned by n up

to a maimum of 8000bytes

varchar-n %' byte percharacter stored up to amaimum of 8000 bytes

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Character data type

tet %' byte percharacter stored up to a

maimum of 2 1nchar-n %2 bytes per

character de!ned by n upto a maimum of ,000bytes

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Character data type

nvarchar-n% 2 bytes percharacters stored up to a

maimum of ,000 bytesntet% 2 bytes per

character stored up to amaimum of 2 1

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Date and Time Data

smalldatetime0'30'3'/00 to

0+30+320*/

datetime0'30'3'*&( to'23('3////

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Date and Time Data

time00400400.0000000

to 2(4&/4&/.///////

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Binary Data

bit 5ull) 0 and ' 'bit