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+= (Sumar igual) (Transact-SQL)
+= (Concatenación de cadenas) (Transact-SQL)
- (valor negativo) (Transact-SQL)
- (restar) (Transact-SQL)
-= (Restar igual) (Transact-SQL)
* (Multiplicar) (Transact-SQL)
*= (Multiplicar igual a) (Transact-SQL)
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/= (Dividir igual) (Transact-SQL)
\ (barra diagonal inversa) (Transact-SQL)
% (Módulo) (Transact-SQL)
%= (Módulo igual) (Transact-SQL)
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~ (NOT bit a bit) (Transact-SQL)
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<= (Menor o igual que) (Transact-SQL)
<> (Distinto de) (Transact-SQL)
!< (No menor que) (Transact-SQL)
!= (No es igual a) (Transact-SQL)
!> (No mayor que) (Transact-SQL)
-- (Comentarios) (Transact-SQL)
/*...*/ (comentario de Transact-SQL)
[ ] (caracteres comodín para búsqueda de coincidencias de Transact-SQL)
[^] (comodín - carácter o caracteres no coincidentes) (Transact-SQL)
_ (comodín, coincidir un carácter) (Transact-SQL)
$PARTITION (Transact-SQL)
@@CONNECTIONS (Transact-SQL)
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@@IDENTITY (Transact-SQL)
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@@LANGID (Transact-SQL)
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@@PROCID (Transact-SQL)
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@@ROWCOUNT (Transact-SQL)
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@@TIMETICKS (Transact-SQL)
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@@TOTAL_READ (Transact-SQL)
@@TOTAL_WRITE (Transact-SQL)
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ABS (Transact-SQL)
ACOS (Transact-SQL)
ADD SIGNATURE (Transact-SQL)
ALL (Transact-SQL)
Instrucciones ALTER (Transact-SQL)
AND (Transact-SQL)
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APPLOCK_TEST (Transact-SQL)
APP_NAME (Transact-SQL)
ASCII (Transact-SQL)
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ASYMKEY_ID (Transact-SQL)
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ATAN (Transact-SQL)
ATN2 (Transact-SQL)
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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 y varbinary (Transact-SQL)
BINARY_CHECKSUM (Transact-SQL)
bit (Transact-SQL)
BREAK (Transact-SQL)
BULK INSERT (Transact-SQL)
CASE (Transact-SQL)
CAST y CONVERT (Transact-SQL)
CATCH (TRY...CATCH) (Transact-SQL)
CEILING (Transact-SQL)
CertProperty (Transact-SQL)
Cert_ID (Transact-SQL)
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COL_LENGTH (Transact-SQL)
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CRYPT_GEN_RANDOM (Transact-SQL)
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cursor (Transact-SQL)
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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)
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DB_ID (Transact-SQL)
DB_NAME (Transact-SQL)
DBCC (Transact-SQL)
DEALLOCATE (Transact-SQL)
decimal y numeric (Transact-SQL)
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DECLARE CURSOR (Transact-SQL)
DECRYPTBYASYMKEY (Transact-SQL)
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DECRYPTBYPASSPHRASE (Transact-SQL)
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ENABLE TRIGGER (Transact-SQL)
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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)
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EVENTDATA (Transact-SQL)
EXCEPT e INTERSECT (Transact-SQL)
EXECUTE AS (Transact-SQL)
EXECUTE AS (cláusula de Transact-SQL)
EXECUTE
EXISTS (Transact-SQL)
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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)
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fn_virtualfilestats (Transact-SQL)
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FORMATMESSAGE (Transact-SQL)
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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)
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HashBytes (Transact-SQL)
HAVING (Transact-SQL)
hierarchyid (Transact-SQL)
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smallmoney (Transact-SQL)
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RAND (Transact-SQL)

SQL Server 2008

Devuelve un valor float pseudoaleatorio de 0 a 1. ambos excluidos.

Icono de vínculo a temas Convenciones de sintaxis de Transact-SQL

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RAND ( [ seed ] )
seed

Es una expresión de tipo entero (tinyint, smallint o int) que proporciona el valor de inicialización. Si no se especifica seed, SQL Server Database Engine (Motor de base de datos de SQL Server) asigna un valor de inicialización de forma aleatoria. Para un valor de inicialización especificado, el resultado devuelto es siempre el mismo.

Las llamadas repetitivas de RAND() con el mismo valor de inicialización devuelven los mismo resultados.

Para una conexión, si se llama a RAND() con el valor de inicialización especificado, todas las llamadas posteriores de RAND() generan resultados basados en la llamada a RAND() inicializada. Por ejemplo, la siguiente consulta siempre devuelve la misma secuencia de números.

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SELECT RAND(100), RAND(), RAND()

En el siguiente ejemplo se producen cuatro números aleatorios diferentes, generados con la función RAND.

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DECLARE @counter smallint;
SET @counter = 1;
WHILE @counter < 5
   BEGIN
      SELECT RAND() Random_Number
      SET @counter = @counter + 1
   END;
GO
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