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Transact-SQL Syntax Conventions (Transact-SQL)
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+ (Add) (Transact-SQL)
+ (Unary Plus) (Transact-SQL)
+ (String Concatenation) (Transact-SQL)
- (Negative) (Transact-SQL)
- (Subtract) (Transact-SQL)
* (Multiply) (Transact-SQL)
/ (Divide) (Transact-SQL)
% (Modulo) (Transact-SQL)
% (Wildcard - Character(s) to Match) (Transact-SQL)
& (Bitwise AND) (Transact-SQL)
| (Bitwise OR) (Transact-SQL)
^ (Bitwise Exclusive OR) (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 APPLICATION ROLE (Transact-SQL)
ALTER ASSEMBLY (Transact-SQL)
ALTER ASYMMETRIC KEY (Transact-SQL)
ALTER AUTHORIZATION (Transact-SQL)
ALTER CERTIFICATE (Transact-SQL)
ALTER CREDENTIAL (Transact-SQL)
ALTER DATABASE (Transact-SQL)
ALTER ENDPOINT (Transact-SQL)
ALTER FULLTEXT CATALOG (Transact-SQL)
ALTER FULLTEXT INDEX (Transact-SQL)
ALTER FUNCTION (Transact-SQL)
ALTER INDEX (Transact-SQL)
ALTER LOGIN (Transact-SQL)
ALTER MASTER KEY (Transact-SQL)
ALTER MESSAGE TYPE (Transact-SQL)
ALTER PARTITION FUNCTION (Transact-SQL)
ALTER PARTITION SCHEME (Transact-SQL)
ALTER PROCEDURE (Transact-SQL)
ALTER QUEUE (Transact-SQL)
ALTER REMOTE SERVICE BINDING (Transact-SQL)
ALTER ROLE (Transact-SQL)
ALTER ROUTE (Transact-SQL)
ALTER SCHEMA (Transact-SQL)
ALTER SERVICE (Transact-SQL)
ALTER SERVICE MASTER KEY (Transact-SQL)
ALTER SYMMETRIC KEY (Transact-SQL)
ALTER TABLE (Transact-SQL)
ALTER TRIGGER (Transact-SQL)
ALTER USER (Transact-SQL)
ALTER VIEW (Transact-SQL)
ALTER XML SCHEMA COLLECTION (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)
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
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)
char and varchar (Transact-SQL)
CHAR (Transact-SQL)
CHARINDEX (Transact-SQL)
CHECKPOINT (Transact-SQL)
CHECKSUM (Transact-SQL)
CHECKSUM_AGG (Transact-SQL)
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)
COMPUTE (Transact-SQL)
Constants (Transact-SQL)
CONTAINS (Transact-SQL)
CONTAINSTABLE (Transact-SQL)
CONTEXT_INFO (Transact-SQL)
CONTINUE (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 AGGREGATE (Transact-SQL)
CREATE APPLICATION ROLE (Transact-SQL)
CREATE ASSEMBLY (Transact-SQL)
CREATE ASYMMETRIC KEY (Transact-SQL)
CREATE CERTIFICATE (Transact-SQL)
CREATE CONTRACT (Transact-SQL)
CREATE CREDENTIAL (Transact-SQL)
CREATE DATABASE (Transact-SQL)
CREATE DEFAULT (Transact-SQL)
CREATE ENDPOINT (Transact-SQL)
CREATE EVENT NOTIFICATION (Transact-SQL)
CREATE FULLTEXT CATALOG (Transact-SQL)
CREATE FULLTEXT INDEX (Transact-SQL)
CREATE FUNCTION (Transact-SQL)
CREATE INDEX (Transact-SQL)
CREATE LOGIN (Transact-SQL)
CREATE MASTER KEY (Transact-SQL)
CREATE MESSAGE TYPE (Transact-SQL)
CREATE PARTITION FUNCTION (Transact-SQL)
CREATE PARTITION SCHEME (Transact-SQL)
CREATE PROCEDURE (Transact-SQL)
CREATE QUEUE (Transact-SQL)
CREATE REMOTE SERVICE BINDING (Transact-SQL)
CREATE ROLE (Transact-SQL)
CREATE ROUTE (Transact-SQL)
CREATE RULE (Transact-SQL)
CREATE SCHEMA (Transact-SQL)
CREATE SERVICE (Transact-SQL)
CREATE STATISTICS (Transact-SQL)
CREATE SYMMETRIC KEY (Transact-SQL)
CREATE SYNONYM (Transact-SQL)
CREATE TABLE (Transact-SQL)
CREATE TRIGGER (Transact-SQL)
CREATE TYPE (Transact-SQL)
CREATE USER (Transact-SQL)
CREATE VIEW (Transact-SQL)
CREATE XML SCHEMA COLLECTION (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)
DATABASEPROPERTY (Transact-SQL)
DATABASEPROPERTYEX (Transact-SQL)
DATABASE_PRINCIPAL_ID (Transact-SQL)
Data Types (Transact-SQL)
DATALENGTH (Transact-SQL)
DATEADD (Transact-SQL)
DATEDIFF (Transact-SQL)
DATENAME (Transact-SQL)
DATEPART (Transact-SQL)
Date and Time (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 AGGREGATE (Transact-SQL)
DROP APPLICATION ROLE (Transact-SQL)
DROP ASSEMBLY (Transact-SQL)
DROP ASYMMETRIC KEY (Transact-SQL)
DROP CERTIFICATE (Transact-SQL)
DROP CONTRACT (Transact-SQL)
DROP CREDENTIAL (Transact-SQL)
DROP DATABASE (Transact-SQL)
DROP DEFAULT (Transact-SQL)
DROP ENDPOINT (Transact-SQL)
DROP EVENT NOTIFICATION (Transact-SQL)
DROP FULLTEXT CATALOG (Transact-SQL)
DROP FULLTEXT INDEX (Transact-SQL)
DROP FUNCTION (Transact-SQL)
DROP INDEX (Transact-SQL)
DROP LOGIN (Transact-SQL)
DROP MASTER KEY (Transact-SQL)
DROP MESSAGE TYPE (Transact-SQL)
DROP PARTITION FUNCTION (Transact-SQL)
DROP PARTITION SCHEME (Transact-SQL)
DROP PROCEDURE (Transact-SQL)
DROP QUEUE (Transact-SQL)
DROP REMOTE SERVICE BINDING (Transact-SQL)
DROP ROLE (Transact-SQL)
DROP ROUTE (Transact-SQL)
DROP RULE (Transact-SQL)
DROP SCHEMA (Transact-SQL)
DROP SERVICE (Transact-SQL)
DROP SIGNATURE (Transact-SQL)
DROP STATISTICS (Transact-SQL)
DROP SYMMETRIC KEY (Transact-SQL)
DROP SYNONYM (Transact-SQL)
DROP TABLE (Transact-SQL)
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DROP USER (Transact-SQL)
DROP VIEW (Transact-SQL)
DROP XML SCHEMA COLLECTION (Transact-SQL)
DUMP (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 (Transact-SQL)
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)
fn_get_sql (Transact-SQL)
fn_helpcollations (Transact-SQL)
fn_listextendedproperty (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)
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FULLTEXTCATALOGPROPERTY (Transact-SQL)
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GET CONVERSATION GROUP (Transact-SQL)
GET_TRANSMISSION_STATUS (Transact-SQL)
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GETDATE (Transact-SQL)
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GO (Transact-SQL)
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GRANT (Transact-SQL)
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HashBytes (Transact-SQL)
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HOST_ID (Transact-SQL)
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IDENT_SEED (Transact-SQL)
IDENTITY (Function) (Transact-SQL)
IDENTITY (Property) (Transact-SQL)
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INDEXKEY_PROPERTY (Transact-SQL)
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INDEX_COL (Transact-SQL)
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int, bigint, smallint, and tinyint (Transact-SQL)
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KILL (Transact-SQL)
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money and smallmoney (Transact-SQL)
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SOME | ANY (Transact-SQL)
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@@DATEFIRST (Transact-SQL)

SQL Server 2005

Updated: 14 April 2006

Returns the current value, for the session, of SET DATEFIRST.

Topic link icon Transact-SQL Syntax Conventions

Copy 

@@DATEFIRST

tinyint

SET DATEFIRST indicates the specified first day of each week. The U.S. English default is 7, Sunday.

Language settings affect date information. In the following example, the language is first set to italian. SELECT @@DATEFIRST returns 1. The language is then set to us_english. SELECT @@DATEFIRST returns 7.

Copy 
SET LANGUAGE italian
GO
SELECT @@DATEFIRST
GO
SET LANGUAGE us_english
GO
SELECT @@DATEFIRST

The following example sets the first day of the week to 5 (Friday), and assumes the current day, Today, to be Saturday. The SELECT statement returns the DATEFIRST value and the number of the current day of the week.

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SET DATEFIRST 5
SELECT @@DATEFIRST AS '1st Day', DATEPART(dw, GETDATE()) AS 'Today'

Here is the result set:

Copy 
1st Day           Today
----------------  --------------
5                 2

Release History

14 April 2006

New content:
  • Added information about the effect of language settings on @@DATEFIRST.
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