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Tutorial: Writing Transact-SQL Statements
+ (Add) (Transact-SQL)
+ (Unary Plus) (Transact-SQL)
+ (String Concatenation) (Transact-SQL)
+= (Add EQUALS) (Transact-SQL)
+= (String Concatenation) (Transact-SQL)
- (Negative) (Transact-SQL)
- (Subtract) (Transact-SQL)
-= (Subtract EQUALS) (Transact-SQL)
* (Multiply) (Transact-SQL)
*= (Multiply EQUALS) (Transact-SQL)
/ (Divide) (Transact-SQL)
/= (Divide EQUALS) (Transact-SQL)
\ (Backslash) (Transact-SQL)
% (Modulo) (Transact-SQL)
%= (Modulo EQUALS) (Transact-SQL)
% (Wildcard - Character(s) to Match) (Transact-SQL)
& (Bitwise AND) (Transact-SQL)
&= (Bitwise AND EQUALS) (Transact-SQL)
| (Bitwise OR) (Transact-SQL)
|= (Bitwise OR EQUALS) (Transact-SQL)
^ (Bitwise Exclusive OR) (Transact-SQL)
^= (Bitwise Exclusive OR EQUALS) (Transact-SQL)
~ (Bitwise NOT) (Transact-SQL)
= (Equals) (Transact-SQL)
> (Greater Than) (Transact-SQL)
< (Less Than) (Transact-SQL)
>= (Greater Than or Equal To) (Transact-SQL)
<= (Less Than or Equal To) (Transact-SQL)
<> (Not Equal To) (Transact-SQL)
!< (Not Less Than) (Transact-SQL)
!= (Not Equal To) (Transact-SQL)
!> (Not Greater Than) (Transact-SQL)
-- (Comment) (Transact-SQL)
/*...*/ (Comment) (Transact-SQL)
[ ] (Wildcard - Character(s) to Match) (Transact-SQL)
[^] (Wildcard - Character(s) Not to Match) (Transact-SQL)
_ (Wildcard - Match One Character) (Transact-SQL)
$PARTITION (Transact-SQL)
@@CONNECTIONS (Transact-SQL)
@@CPU_BUSY (Transact-SQL)
@@CURSOR_ROWS (Transact-SQL)
@@DATEFIRST (Transact-SQL)
@@DBTS (Transact-SQL)
@@ERROR (Transact-SQL)
@@FETCH_STATUS (Transact-SQL)
@@IDENTITY (Transact-SQL)
@@IDLE (Transact-SQL)
@@IO_BUSY (Transact-SQL)
@@LANGID (Transact-SQL)
@@LANGUAGE (Transact-SQL)
@@LOCK_TIMEOUT (Transact-SQL)
@@MAX_CONNECTIONS (Transact-SQL)
@@MAX_PRECISION (Transact-SQL)
@@NESTLEVEL (Transact-SQL)
@@OPTIONS (Transact-SQL)
@@PACK_RECEIVED (Transact-SQL)
@@PACK_SENT (Transact-SQL)
@@PACKET_ERRORS (Transact-SQL)
@@PROCID (Transact-SQL)
@@REMSERVER (Transact-SQL)
@@ROWCOUNT (Transact-SQL)
@@SERVERNAME (Transact-SQL)
@@SERVICENAME (Transact-SQL)
@@SPID (Transact-SQL)
@@TEXTSIZE (Transact-SQL)
@@TIMETICKS (Transact-SQL)
@@TOTAL_ERRORS (Transact-SQL)
@@TOTAL_READ (Transact-SQL)
@@TOTAL_WRITE (Transact-SQL)
@@TRANCOUNT (Transact-SQL)
@@VERSION (Transact-SQL)
ABS (Transact-SQL)
ACOS (Transact-SQL)
ADD SIGNATURE (Transact-SQL)
ALL (Transact-SQL)
ALTER Statements (Transact-SQL)
AND (Transact-SQL)
ANY (Transact-SQL)
APPLOCK_MODE (Transact-SQL)
APPLOCK_TEST (Transact-SQL)
APP_NAME (Transact-SQL)
ASCII (Transact-SQL)
ASIN (Transact-SQL)
ASSEMBLYPROPERTY (Transact-SQL)
ASYMKEY_ID (Transact-SQL)
ASYMKEYPROPERTY (Transact-SQL)
ATAN (Transact-SQL)
ATN2 (Transact-SQL)
AVG (Transact-SQL)
BACKUP (Transact-SQL)
BACKUP CERTIFICATE (Transact-SQL)
BACKUP MASTER KEY (Transact-SQL)
BACKUP SERVICE MASTER KEY (Transact-SQL)
BEGIN...END (Transact-SQL)
BEGIN CONVERSATION TIMER (Transact-SQL)
BEGIN DIALOG CONVERSATION (Transact-SQL)
BEGIN DISTRIBUTED TRANSACTION (Transact-SQL)
BEGIN TRANSACTION (Transact-SQL)
BETWEEN (Transact-SQL)
binary and varbinary (Transact-SQL)
BINARY_CHECKSUM (Transact-SQL)
bit (Transact-SQL)
BREAK (Transact-SQL)
BULK INSERT (Transact-SQL)
CASE (Transact-SQL)
CAST and CONVERT (Transact-SQL)
CATCH (TRY...CATCH) (Transact-SQL)
CEILING (Transact-SQL)
CERTPROPERTY (Transact-SQL)
Cert_ID (Transact-SQL)
Change Data Capture Functions (Transact-SQL)
Change Tracking Functions (Transact-SQL)
char and varchar (Transact-SQL)
CHAR (Transact-SQL)
CHARINDEX (Transact-SQL)
CHECKPOINT (Transact-SQL)
CHECKSUM (Transact-SQL)
CHECKSUM_AGG
CLOSE (Transact-SQL)
CLOSE MASTER KEY (Transact-SQL)
CLOSE SYMMETRIC KEY (Transact-SQL)
COALESCE (Transact-SQL)
COLLATE (Transact-SQL)
COLLATIONPROPERTY (Transact-SQL)
COL_LENGTH (Transact-SQL)
COL_NAME (Transact-SQL)
COLUMNPROPERTY (Transact-SQL)
COLUMNS_UPDATED (Transact-SQL)
COMMIT TRANSACTION (Transact-SQL)
COMMIT WORK (Transact-SQL)
Compound Operators (Transact-SQL)
COMPUTE (Transact-SQL)
CONNECTIONPROPERTY (Transact-SQL)
Constants (Transact-SQL)
CONTAINS (Transact-SQL)
CONTAINSTABLE (Transact-SQL)
CONTINUE (Transact-SQL)
CONTEXT_INFO (Transact-SQL)
Control-of-Flow Language (Transact-SQL)
CONVERT (Transact-SQL)
COS (Transact-SQL)
COT (Transact-SQL)
COUNT (Transact-SQL)
COUNT_BIG (Transact-SQL)
CREATE Statements (Transact-SQL)
CRYPT_GEN_RANDOM (Transact-SQL)
CURRENT_REQUEST_ID (Transact-SQL)
CURRENT_TIMESTAMP (Transact-SQL)
CURRENT_USER (Transact-SQL)
cursor (Transact-SQL)
CURSOR_STATUS (Transact-SQL)
Cursors (Transact-SQL)
Data Collector Functions (Transact-SQL)
Data Types (Transact-SQL)
DATABASE_PRINCIPAL_ID (Transact-SQL)
DATABASEPROPERTY (Transact-SQL)
DATABASEPROPERTYEX (Transact-SQL)
DATALENGTH (Transact-SQL)
date (Transact-SQL)
DATEADD (Transact-SQL)
DATEDIFF (Transact-SQL)
DATENAME (Transact-SQL)
DATEPART (Transact-SQL)
datetime (Transact-SQL)
datetime2 (Transact-SQL)
datetimeoffset (Transact-SQL)
DAY (Transact-SQL)
DB_ID (Transact-SQL)
DB_NAME (Transact-SQL)
DBCC (Transact-SQL)
DEALLOCATE (Transact-SQL)
decimal and numeric (Transact-SQL)
DECLARE @local_variable (Transact-SQL)
DECLARE CURSOR (Transact-SQL)
DECRYPTBYASYMKEY (Transact-SQL)
DECRYPTBYCERT (Transact-SQL)
DECRYPTBYKEY (Transact-SQL)
DECRYPTBYKEYAUTOASYMKEY (Transact-SQL)
DECRYPTBYKEYAUTOCERT (Transact-SQL)
DECRYPTBYPASSPHRASE (Transact-SQL)
DEGREES (Transact-SQL)
DELETE (Transact-SQL)
DENSE_RANK (Transact-SQL)
DENY (Transact-SQL)
DIFFERENCE (Transact-SQL)
DISABLE TRIGGER (Transact-SQL)
DROP Statements (Transact-SQL)
ELSE (IF...ELSE) (Transact-SQL)
ENABLE TRIGGER (Transact-SQL)
ENCRYPTBYASYMKEY (Transact-SQL)
ENCRYPTBYCERT (Transact-SQL)
ENCRYPTBYKEY (Transact-SQL)
ENCRYPTBYPASSPHRASE (Transact-SQL)
END (BEGIN...END) (Transact-SQL)
END CONVERSATION (Transact-SQL)
ERROR_LINE (Transact-SQL)
ERROR_MESSAGE (Transact-SQL)
ERROR_NUMBER (Transact-SQL)
ERROR_PROCEDURE (Transact-SQL)
ERROR_SEVERITY (Transact-SQL)
ERROR_STATE (Transact-SQL)
EVENTDATA (Transact-SQL)
EXCEPT and INTERSECT (Transact-SQL)
EXECUTE AS (Transact-SQL)
EXECUTE AS Clause (Transact-SQL)
EXECUTE
EXISTS (Transact-SQL)
EXP (Transact-SQL)
Expressions (Transact-SQL)
FETCH (Transact-SQL)
FILE_ID (Transact-SQL)
FILE_IDEX (Transact-SQL)
FILE_NAME (Transact-SQL)
FILEGROUP_ID (Transact-SQL)
FILEGROUP_NAME (Transact-SQL)
FILEGROUPPROPERTY (Transact-SQL)
FILEPROPERTY (Transact-SQL)
float and real (Transact-SQL)
FLOOR (Transact-SQL)
sys.fn_check_object_signatures (Transact-SQL)
fn_get_audit_file (Transact-SQL)
fn_get_sql (Transact-SQL)
fn_helpcollations (Transact-SQL)
fn_listextendedproperty (Transact-SQL)
sys.fn_xe_file_target_read_file (Transact-SQL)
fn_my_permissions (Transact-SQL)
fn_servershareddrives (Transact-SQL)
fn_trace_geteventinfo (Transact-SQL)
fn_trace_getfilterinfo (Transact-SQL)
fn_trace_getinfo (Transact-SQL)
fn_trace_gettable (Transact-SQL)
fn_virtualfilestats (Transact-SQL)
fn_virtualservernodes (Transact-SQL)
FOR Clause (Transact-SQL)
FORMATMESSAGE (Transact-SQL)
FREETEXT (Transact-SQL)
FREETEXTTABLE (Transact-SQL)
FROM (Transact-SQL)
FULLTEXTCATALOGPROPERTY (Transact-SQL)
FULLTEXTSERVICEPROPERTY (Transact-SQL)
Functions (Transact-SQL)
geography (Transact-SQL)
geometry (Transact-SQL)
GET CONVERSATION GROUP (Transact-SQL)
GET_FILESTREAM_TRANSACTION_CONTEXT (Transact-SQL)
GET_TRANSMISSION_STATUS (Transact-SQL)
GETANSINULL (Transact-SQL)
GETDATE (Transact-SQL)
GETUTCDATE (Transact-SQL)
GO (Transact-SQL)
GOTO (Transact-SQL)
GRANT (Transact-SQL)
GROUP BY (Transact-SQL)
GROUPING (Transact-SQL)
GROUPING_ID (Transact-SQL)
HAS_DBACCESS (Transact-SQL)
HAS_PERMS_BY_NAME (Transact-SQL)
HASHBYTES (Transact-SQL)
HAVING (Transact-SQL)
hierarchyid (Transact-SQL)
Hints (Transact-SQL)
HOST_ID (Transact-SQL)
HOST_NAME (Transact-SQL)
IDENT_CURRENT (Transact-SQL)
IDENT_INCR (Transact-SQL)
IDENT_SEED (Transact-SQL)
IDENTITY (Function) (Transact-SQL)
IDENTITY (Property) (Transact-SQL)
IF...ELSE (Transact-SQL)
image (Transact-SQL)
IN (Transact-SQL)
INDEXKEY_PROPERTY (Transact-SQL)
INDEXPROPERTY (Transact-SQL)
INDEX_COL (Transact-SQL)
INSERT (Transact-SQL)
int, bigint, smallint, and tinyint (Transact-SQL)
INTO Clause (Transact-SQL)
IS_MEMBER (Transact-SQL)
IS_OBJECTSIGNED (Transact-SQL)
IS_SRVROLEMEMBER (Transact-SQL)
ISDATE (Transact-SQL)
IS [NOT] NULL (Transact-SQL)
ISNULL (Transact-SQL)
ISNUMERIC (Transact-SQL)
Key_GUID (Transact-SQL)
Key_ID (Transact-SQL)
KEY_NAME (Transact-SQL)
KILL (Transact-SQL)
KILL QUERY NOTIFICATION SUBSCRIPTION (Transact-SQL)
KILL STATS JOB (Transact-SQL)
LEFT (Transact-SQL)
LEN (Transact-SQL)
LIKE (Transact-SQL)
LOG (Transact-SQL)
LOG10 (Transact-SQL)
LOGINPROPERTY (Transact-SQL)
LOWER (Transact-SQL)
LTRIM (Transact-SQL)
MAX (Transact-SQL)
MERGE (Transact-SQL)
MIN (Transact-SQL)
MIN_ACTIVE_ROWVERSION (Transact-SQL)
money and smallmoney (Transact-SQL)
MONTH (Transact-SQL)
MOVE CONVERSATION (Transact-SQL)
NCHAR (Transact-SQL)
nchar and nvarchar (Transact-SQL)
NEWID (Transact-SQL)
NEWSEQUENTIALID() (Transact-SQL)
NOT (Transact-SQL)
ntext, text, and image (Transact-SQL)
NTILE (Transact-SQL)
NULLIF (Transact-SQL)
numeric (Transact-SQL)
OBJECT_DEFINITION (Transact-SQL)
OBJECT_ID (Transact-SQL)
OBJECT_NAME (Transact-SQL)
OBJECT_SCHEMA_NAME (Transact-SQL)
OBJECTPROPERTY (Transact-SQL)
OBJECTPROPERTYEX (Transact-SQL)
ODBC Scalar Functions (Transact-SQL)
OPEN (Transact-SQL)
OPEN MASTER KEY (Transact-SQL)
OPEN SYMMETRIC KEY (Transact-SQL)
OPENDATASOURCE (Transact-SQL)
OPENQUERY (Transact-SQL)
OPENROWSET (Transact-SQL)
OPENXML (Transact-SQL)
Operators (Transact-SQL)
OPTION Clause (Transact-SQL)
OR (Transact-SQL)
ORDER BY Clause (Transact-SQL)
ORIGINAL_DB_NAME (Transact-SQL)
ORIGINAL_LOGIN (Transact-SQL)
OUTPUT Clause (Transact-SQL)
OVER Clause (Transact-SQL)
PARSENAME (Transact-SQL)
PathName (Transact-SQL)
PATINDEX (Transact-SQL)
PERMISSIONS (Transact-SQL)
PI (Transact-SQL)
POWER (Transact-SQL)
Predicate (Transact-SQL)
PRINT (Transact-SQL)
PUBLISHINGSERVERNAME (Transact-SQL)
PWDCOMPARE (Transact-SQL)
PWDENCRYPT (Transact-SQL)
QUOTENAME (Transact-SQL)
RADIANS (Transact-SQL)
RAISERROR
RAND (Transact-SQL)
RANK (Transact-SQL)
READTEXT (Transact-SQL)
real (Transact-SQL)
RECEIVE (Transact-SQL)
RECONFIGURE (Transact-SQL)
REPLACE (Transact-SQL)
REPLICATE (Transact-SQL)
Reserved Keywords (Transact-SQL)
RESTORE Statements for Restoring, Recovering, and Managing Backups (Transact-SQL)
RESTORE MASTER KEY (Transact-SQL)
RESTORE SERVICE MASTER KEY (Transact-SQL)
RETURN (Transact-SQL)
REVERSE (Transact-SQL)
REVERT (Transact-SQL)
REVOKE (Transact-SQL)
RIGHT (Transact-SQL)
ROLLBACK TRANSACTION (Transact-SQL)
ROLLBACK WORK (Transact-SQL)
ROUND (Transact-SQL)
ROW_NUMBER (Transact-SQL)
ROWCOUNT_BIG (Transact-SQL)
rowversion (Transact-SQL)
RTRIM (Transact-SQL)
SAVE TRANSACTION (Transact-SQL)
SCHEMA_ID (Transact-SQL)
SCHEMA_NAME (Transact-SQL)
SCOPE_IDENTITY (Transact-SQL)
Search Condition (Transact-SQL)
SELECT @local_variable (Transact-SQL)
SELECT (Transact-SQL)
SEND (Transact-SQL)
SERVERPROPERTY (Transact-SQL)
SESSION_USER (Transact-SQL)
SESSIONPROPERTY (Transact-SQL)
SET @local_variable (Transact-SQL)
SET (Transact-SQL)
SETUSER (Transact-SQL)
SHUTDOWN (Transact-SQL)
SIGN (Transact-SQL)
SignByAsymKey (Transact-SQL)
SignByCert (Transact-SQL)
SIN (Transact-SQL)
smalldatetime (Transact-SQL)
smallint (Transact-SQL)
smallmoney (Transact-SQL)
SOME | ANY (Transact-SQL)
SOUNDEX (Transact-SQL)
SPACE (Transact-SQL)
sql_variant (Transact-SQL)
SQL_VARIANT_PROPERTY (Transact-SQL)
SQRT (Transact-SQL)
SQUARE (Transact-SQL)
STATS_DATE (Transact-SQL)
STDEV (Transact-SQL)
STDEVP (Transact-SQL)
STR (Transact-SQL)
STUFF (Transact-SQL)
SUBSTRING (Transact-SQL)
SUM (Transact-SQL)
SUSER_ID (Transact-SQL)
SUSER_NAME (Transact-SQL)
SUSER_SID (Transact-SQL)
SUSER_SNAME (Transact-SQL)
SWITCHOFFSET (Transact-SQL)
SYSDATETIME (Transact-SQL)
SYSDATETIMEOFFSET (Transact-SQL)
SYMKEYPROPERTY (Transact-SQL)
System Stored Procedures (Transact-SQL)
System Tables (Transact-SQL)
System Views (Transact-SQL)
SYSUTCDATETIME (Transact-SQL)
sys.fn_builtin_permissions (Transact-SQL)
sys.fn_translate_permissions (Transact-SQL)
sys.fn_validate_plan_guide (Transact-SQL)
sys.login_token (Transact-SQL)
sys.user_token (Transact-SQL)
SYSTEM_USER (Transact-SQL)
table (Transact-SQL)
Table Value Constructor (Transact-SQL)
TAN (Transact-SQL)
TERTIARY_WEIGHTS (Transact-SQL)
text (Transact-SQL)
TEXTPTR (Transact-SQL)
TEXTVALID (Transact-SQL)
time (Transact-SQL)
tinyint (Transact-SQL)
TODATETIMEOFFSET (Transact-SQL)
TOP (Transact-SQL)
Trace Flags (Transact-SQL)
Transactions (Transact-SQL)
TRY...CATCH (Transact-SQL)
TRIGGER_NESTLEVEL (Transact-SQL)
TRUNCATE TABLE (Transact-SQL)
TYPE_ID (Transact-SQL)
TYPE_NAME (Transact-SQL)
TYPEPROPERTY (Transact-SQL)
UNICODE (Transact-SQL)
UNION (Transact-SQL)
uniqueidentifier (Transact-SQL)
UPDATE (Transact-SQL)
UPDATE() (Transact-SQL)
UPDATE STATISTICS (Transact-SQL)
UPDATETEXT (Transact-SQL)
UPPER (Transact-SQL)
USE (Transact-SQL)
USER (Transact-SQL)
USER_ID (Transact-SQL)
USER_NAME (Transact-SQL)
VAR (Transact-SQL)
varbinary (Transact-SQL)
varchar (Transact-SQL)
VARP (Transact-SQL)
VerifySignedByCert (Transact-SQL)
VerifySignedByAsymKey (Transact-SQL)
WAITFOR (Transact-SQL)
WHERE (Transact-SQL)
WHILE (Transact-SQL)
WITH common_table_expression (Transact-SQL)
WITH XMLNAMESPACES (Transact-SQL)
WRITETEXT (Transact-SQL)
XACT_STATE (Transact-SQL)
xml (Transact-SQL)
xml_schema_namespace (Transact-SQL)
YEAR (Transact-SQL)
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VARP (Transact-SQL)

SQL Server 2008

Returns the statistical variance for the population for all values in the specified expression. May be followed by the OVER clause.

Topic link iconTransact-SQL Syntax Conventions

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VARP ( [ ALL | DISTINCT ] expression )
ALL

Applies the function to all values. ALL is the default.

DISTINCT

Specifies that each unique value is considered.

expression

Is an expression of the exact numeric or approximate numeric data type category, except for the bit data type. Aggregate functions and subqueries are not permitted.

If VARP is used on all items in a SELECT statement, each value in the result set is included in the calculation. VARP can be used with numeric columns only. Null values are ignored.

The following example returns the variance for the population for all bonus values in the SalesPerson table.

Copy 
USE AdventureWorks;
GO
SELECT VARP(Bonus)
FROM Sales.SalesPerson;
GO
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