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* (Multiply) (Transact-SQL)
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% (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)
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-- (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)
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@@DATEFIRST (Transact-SQL)
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@@ERROR (Transact-SQL)
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@@IDENTITY (Transact-SQL)
@@IDLE (Transact-SQL)
@@IO_BUSY (Transact-SQL)
@@LANGID (Transact-SQL)
@@LANGUAGE (Transact-SQL)
@@LOCK_TIMEOUT (Transact-SQL)
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@@PACK_RECEIVED (Transact-SQL)
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@@TEXTSIZE (Transact-SQL)
@@TIMETICKS (Transact-SQL)
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@@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)
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ALTER TABLE (Transact-SQL)
ALTER TRIGGER (Transact-SQL)
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ALTER XML SCHEMA COLLECTION (Transact-SQL)
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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)
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BEGIN TRANSACTION (Transact-SQL)
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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)
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CEILING (Transact-SQL)
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Cert_ID (Transact-SQL)
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CLOSE SYMMETRIC KEY (Transact-SQL)
COALESCE (Transact-SQL)
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COL_LENGTH (Transact-SQL)
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Constants (Transact-SQL)
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Control-of-Flow Language (Transact-SQL)
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CREATE CERTIFICATE (Transact-SQL)
CREATE CONTRACT (Transact-SQL)
CREATE CREDENTIAL (Transact-SQL)
CREATE DATABASE (Transact-SQL)
CREATE DEFAULT (Transact-SQL)
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CREATE EVENT NOTIFICATION (Transact-SQL)
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CREATE FUNCTION (Transact-SQL)
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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)
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CREATE TYPE (Transact-SQL)
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CREATE XML SCHEMA COLLECTION (Transact-SQL)
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Data Types (Transact-SQL)
DATALENGTH (Transact-SQL)
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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)
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DecryptByKeyAutoAsymKey (Transact-SQL)
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DEGREES (Transact-SQL)
DELETE (Transact-SQL)
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DIFFERENCE (Transact-SQL)
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ENABLE TRIGGER (Transact-SQL)
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END CONVERSATION (Transact-SQL)
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FILEGROUPPROPERTY (Transact-SQL)
FILEPROPERTY (Transact-SQL)
float and real (Transact-SQL)
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fn_get_sql (Transact-SQL)
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ATN2 (Transact-SQL)

SQL Server 2005

Returns the angle, in radians, between the positive x-axis and the ray from the origin to the point (y, x), where x and y are the values of the two specified float expressions.

Topic link icon Transact-SQL Syntax Conventions

Copy 

ATN2 ( float_expression , float_expression )
float_expression

Is an expression of the float data type.

The following example calculates the ATN2 for the specified x and y components.

Copy 
DECLARE @x float
DECLARE @y float
SET @x = 35.175643
SET @y = 129.44
SELECT 'The ATN2 of the angle is: ' + CONVERT(varchar,ATN2(@x,@y ))
GO

Here is the result set.

Copy 
The ATN2 of the angle is: 0.265345                       

(1 row(s) affected)

Release History

14 April 2006

Changed content:
  • Corrected the definition of this function.

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