Exact Numeric Data Types
DATA TYPE
FROM
TO
bigint
-9,223,372,036,854,775,808
9,223,372,036,854,775,807
int
-2,147,483,648
2,147,483,647
smallint
-32,768
32,767
tinyint
0
255
bit
0
1
decimal
-10^38 +1
10^38 -1
numeric
-10^38 +1
10^38 -1
money
-922,337,203,685,477.5808
+922,337,203,685,477.5807
smallmoney
-214,748.3648
+214,748.3647
Approximate Numeric Data Types
DATA TYPE
FROM
TO
float
-1.79E + 308
1.79E + 308
real
-3.40E + 38
3.40E + 38
5. SQL ─ Data Types
SQL
23
Date and Time Data Types
DATA TYPE
FROM
TO
datetime
Jan 1, 1753
Dec 31, 9999
smalldatetime
Jan 1, 1900
Jun 6, 2079
date
Stores a date like June 30, 1991
time
Stores a time of day like 12:30 P.M.
Note − Here, datetime has 3.33 milliseconds accuracy where as smalldatetime has 1
minute accuracy.
Character Strings Data Types
DATA TYPE
Description
char
Maximum length of 8,000 characters.( Fixed length non-
Unicode characters)
varchar
Maximum of 8,000 characters.(Variable-length non-Unicode
data).
varchar(max)
Maximum length of 231characters, Variable-length non-
Unicode data (SQL Server 2005 only).
text
Variable-length non-Unicode data with a maximum length of
2,147,483,647 characters.
Unicode Character Strings Data Types
DATA TYPE
Description
nchar
Maximum length of 4,000 characters.( Fixed length Unicode)
nvarchar
Maximum length of 4,000 characters.(Variable length Unicode)
SQL
24
nvarchar(max)
Maximum length of 231characters (SQL Server 2005 only).(
Variable length Unicode)
ntext
Maximum length of 1,073,741,823 characters. ( Variable length
Unicode )
Binary Data Types
DATA TYPE
Description
binary
Maximum length of 8,000 bytes(Fixed-length binary data )
varbinary
Maximum length of 8,000 bytes.(Variable length binary data)
varbinary(max)
Maximum length of 231 bytes (SQL Server 2005 only). (
Variable length Binary data)
image
Maximum length of 2,147,483,647 bytes. ( Variable length
Binary Data)
Misc Data Types
DATA TYPE
Description
sql_variant
Stores values of various SQL Server-supported data types,
except text, ntext, and timestamp.
timestamp
Stores a database-wide unique number that gets updated every
time a row gets updated
uniqueidentifier
Stores a globally unique identifier (GUID)
xml
Stores XML data. You can store xml instances in a column or a
variable (SQL Server 2005 only).
cursor
Reference to a cursor object
table
Stores a result set for later processing
SQL
25
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