Export (0) Print
Expand All

SQL_VARIANT_PROPERTY (Transact-SQL)

Returns the base data type and other information about a sql_variant value.

Topic link icon Transact-SQL Syntax Conventions

SQL_VARIANT_PROPERTY ( expression , property )

expression

Is an expression of type sql_variant.

property

Contains the name of the sql_variant property for which information is to be provided. property is varchar(128), and can be any one of the following values.

Value

Description

Base type of sql_variant returned

BaseType

SQL Server data type, such as:

bigint

binary

char

date

datetime

datetime2

datetimeoffset

decimal

float

int

money

nchar

numeric

nvarchar

real

smalldatetime

smallint

smallmoney

time

tinyint

uniqueidentifier

varbinary

varchar

sysname

NULL = Input is not valid.

Precision

Number of digits of the numeric base data type:

datetime = 23

smalldatetime = 16

float = 53

real = 24

decimal (p,s) and numeric (p,s) = p

money = 19

smallmoney = 10

bigint = 19

int = 10

smallint = 5

tinyint = 3

bit = 1

All other types = 0

int

NULL = Input is not valid.

Scale

Number of digits to the right of the decimal point of the numeric base data type:

decimal (p,s) and numeric (p,s) = s

money and smallmoney = 4

datetime = 3

all other types = 0

int

NULL = Input is not valid.

TotalBytes

Number of bytes required to hold both the metadata and data of the value. This information would be useful in checking the maximum side of data in a sql_variant column. If the value is larger than 900, index creation will fail.

int

NULL = Input is not valid.

Collation

Represents the collation of the particular sql_variant value.

sysname

NULL = Input is not valid.

MaxLength

Maximum data type length, in bytes. For example, MaxLength of nvarchar(50) is 100, MaxLength of int is 4.

int

NULL = Input is not valid.

sql_variant

The following example retrieves SQL_VARIANT_PROPERTY information about the colA value 46279.1 where colB =1689, given that tableA has colA that is of type sql_variant and colB.

CREATE   TABLE tableA(colA sql_variant, colB int)
INSERT INTO tableA values ( cast (46279.1 as decimal(8,2)), 1689)
SELECT   SQL_VARIANT_PROPERTY(colA,'BaseType') AS 'Base Type',
         SQL_VARIANT_PROPERTY(colA,'Precision') AS 'Precision',
         SQL_VARIANT_PROPERTY(colA,'Scale') AS 'Scale'
FROM      tableA
WHERE      colB = 1689

Here is the result set. Note that each of these three values is a sql_variant.

Base Type    Precision    Scale
---------    ---------    -----
decimal      8           2

(1 row(s) affected)

Community Additions

ADD
Show:
© 2014 Microsoft