Transact SQL :: Set Unique Random Number
Dec 1, 2015
Lets say we have a table (tblProducts)
ID  Item           RandomNumber
-------------------------------------------
1Â Â Â JEANSÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1234567
2Â Â Â SHIRTÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 72813550
3Â Â Â HOODÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Null
4Â Â Â TROUSERÂ Â Â Â Â Â Â Â Â Â Â Â Â 72191839
5Â Â Â BLAZERÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0
I want to perform a query so that SQL should look for RandomNumber Values and set a Unique Random Number Where RandomNumber Value is Null or 0.So I have got a solution as one of the MSDN Member shared the below query
select id,item,RandomNumber=Case when RandomNumber=0 then (select floor(rand()*100000000-1))
when RandomNumber is null then (select floor(rand()*100000000-1))
else RandomNumber end from tblProducts
So, can you all confirm me, that performing this query ensures that if a Value is assigned to one of the Item in RandomNumber Column, that value will not be assignend to any other Item in RandoNumberColumn.
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Dec 11, 2007
I need to generate a random 10 digit alphanumeric string that is also unique within a table. My application will be calling a stored procedure to insert this number into the table. This number will be associated with a id from another table. Is it better to generate the random number within sql (and perform the lookup at the same time), then just pass the number back to the calling application ?
If the calling application generates the number, it will also need to make a call to check if its unique. So im thinking it would be best to simply have sql generate this random number, check the number against the table and then insert the new record.
thoughts ?
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Aug 22, 2007
Hi
I have a sql procedure. I need to create UNIQUE random 13 digit number to use for barcode.
How do I generate 13 digit UNIQUE random in sql procedure?
Advance thanks
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Nov 17, 2015
I need to assign a random number between 0 and 1 to all eligible cases of cancer.Â
I have a file of records like:
patientid
tumid
site
How can I assign a random number to each record?
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Nov 15, 2015
Lets say I have a table - tblProducts
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May 19, 2015
How to Generate the Unique 8 Digit Number in SQL SERVER.And also am trying with below methods which is not working as expected.
Methode-1:
SELECT CONVERT(VARCHAR(5),GETDATE(),112) +CONVERT(VARCHAR,DATEPART(MS,GETDATE())) AS '8DigitUniqNum'
Methode-2:
DECLARE @UniqueID uniqueidentifier
SET @UniqueID = NEWID()
SELECT LEFT(@UniqueID,8) AS '8DigitUniqNum'
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May 4, 2006
I once came across a database in which when ever a row was inserted, a unique random code was also inserted in a column. This code generated was similar to format like {8A5FE5F1-6BDA-476C-A4DB584A7710FBF91121054625}. I was told that SQL2000 has some inbuilt functionality for this.
Any idea on how to do this using SQL2000 or coding.
I feel this is much better than Identity Column as using autonumbers in quesrystring is too much risky as they easily readable.
Please help.
Thanks
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Oct 22, 2004
Hi there,I am trying to create a UID that is unique within my SQL Server. There are many users accessing the Server in seperate databases, but then I want to combine all the data from these tables, keeping the ID from each one as a primary key. I have written the following function, but when i call it as a default value for a field, it does not produce a unique number. CREATE FUNCTION GETNEXTID(@CURDATE DATETIME)RETURNS BIGINTASBEGINRETURN (SELECT CAST(CAST(DATEPART(YY,@CURDATE) AS VARCHAR) +RIGHT('0' + CAST(DATEPART(M,@CURDATE) AS VARCHAR),2) +RIGHT('0' + CAST(DATEPART(D,@CURDATE) AS VARCHAR),2) +RIGHT('0' + CAST(DATEPART(HH,@CURDATE) AS VARCHAR),2) +RIGHT('0' + CAST(DATEPART(SS,@CURDATE) AS VARCHAR),2) +RIGHT('00' + CAST(DATEPART(MS,@CURDATE) AS VARCHAR),3) AS BIGINT))END Can anyone help?
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Aug 28, 2007
Hi, for some reason I want to have a unique ID with a seed and random Identity increment (I want an ascending ID's but without able to know how many objects there are).
any ideas?
thanks in advance
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Jan 14, 2008
Hi I am using VS 2005 with SQL 2005.
I had a Datagrid and i Need to bind data into it.
I need to show Random Unique ID's based on the Parameter i pass.
I wrote select top 5 * from Employee order by NEWID()
for this i had created a Stored Procedure as
create Proc Demo(@N int)as beginselect top @N * from Employee order by NEWID()end
Its showing a syntax error near @N. How can i pass the parameter for Select Top @N * from .......
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Apr 15, 2002
Generates a true random number from xxx to zzz. Uses a table variable so it all depends on the boundaries you specify how long it will take.
create procedure random_number
@lower int = 0,
@upper int = 256,
@number int = null output
as
set nocount on
declare @numbers table (number_id int identity(1,1), value int)
if @lower > @upper
begin
set @number = @lower
set @lower = @upper
set @upper = @number
end
set @number = rand((datepart(mm, getdate()) * 100000) + (datepart(ss, getdate()) * 1000) + datepart(ms, getdate()))
while (select count(*)
from @numbers) < (@upper - @lower + 1)
begin
insert into @numbers (value)
select (@upper - @lower + 1) * rand() + @lower
end
select @number = value
from @numbers
order by newid()
go
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Oct 8, 2005
I need to update an integer column in my table with a random number. Here's what I've done so far (with the table name and column names changed):
UPDATE dbo.MyTable
SET Column1 = RAND() * 1000000
My question is, how come the values in my column all have the same value? I thought the RAND function gives out a random number? How can I update my table to generate random numbers?
Thanks in advance.
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Nov 27, 2004
Hi,
How can I update my users table and set the password field to a random number or string.
eg.
update tbl_users set password='a way to generate a random number say between 2000 and 100000 for example'
even better would be a randomly generated alphanumeric string.
All help much appreciated.
Cheers,
RG
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Feb 23, 2005
i have an application that uses a table for login access, for security reason i need to get a random numbers in this table daily. table consist of just two columns, userid and password. This table will be printed out on the web for users to get valid username and pw daily.
I m thinking about a job or dts package that will run once daily with a sql script to generate random number (referable 5 digit-letters and numbers), delete the table and re-create the table with same set column names and insert the random values in username and pw column.
Will appreciate help on this
Thanks
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Aug 2, 2007
How to create random number for the value in other colum. Please help and urgent
I have a table with 4 column ( ID, Ori_Quantity, Rand_Quantity, Location)
If Ori_quantity < 5000 then
Rand_quanty as qty = I want Random number within 100
Else If Ori_quantity = 0 or < 10 then
Rand_quanty as qty = I want Random number within 7
End if
From tblname where Location = 'DAS'
I have around 2500 field. So when I run the query I expect the result should be
like below
Ori_Quantity, Rand_Quantity
------------ -------------
4000 90
2986 57
2500 89
I don't want to pass any parameter and I am new. Please help
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Mar 25, 2008
Hi,
I need to generate random numbers that will always contain 9 digits.
How can I do that?
Thanks
Whisky-my beloved dog who died suddenly on the 29/06/06-I miss u so much.
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Jun 9, 2007
I just wana make a random id number based on4 digits-for examples??Thanks in AdvanceCh.Yallin
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Sep 28, 2007
In a Name table, I need to generate unique 6 digit random numbers in a field called UniqueID for all records that have the ID field populated.
I will need to run this script periodically. It is critical that any prevoiusly assigned UniqueIDs do not change and only fields that have an empty UniqueID field are updated. I need to preserve the historical mapping of the existing IDs to the ongoing assignment of UniqueIDs.
Regards,
Polar Bear
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Jan 15, 2005
I'm building a test database and I need to randomly create phone numbers in the format xxxxxxxxxx
I have 5000 contacts and need to generate fake phone numbers for them. anyone know how I can write an update query to do this?
ScAndal
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Sep 7, 2006
Hey Guys, I have a quick stored
procedure question for you. I created a procedure that returns a randomly
generated number.
I know there is a built in
Rand() function but I need to be able to
specify the range. Anyways, it€™s returning multiple numbers (1 for each row in
the tempTable)
But I just want one number returned.
I tried using MAX( ) but that€™s not a good way of doing it.
My question is, how do I return just
one record or number?
Thanks
Fellas,
Chris
ALTER PROCEDURE
dbo.spx_GetRandomNum
AS
DECLARE @Start_Num int
DECLARE @End_Num int
DECLARE @ReturnValue
int
DECLARE @RecNum
int
DECLARE @CurrentRec
int
DECLARE @MyCount
int
SET @Start_Num=1
SET
@End_Num=100
CREATE TABLE #tblTemp (CurrentRecNo
int IDENTITY(1,1), RandomNumber int null)
SET @MyCount = ( @End_Num -
@Start_Num ) + 1
SET @CurrentRec = 1
WHILE @CurrentRec <= @MyCount
BEGIN
SET @RecNum
= CAST((RAND() * @MyCount) AS int) + @Start_Num
INSERT INTO
#tblTemp (RandomNumber) VALUES (@RecNum)
SET
@CurrentRec = @CurrentRec + 1
END
SET
@ReturnValue = (SELECT RandomNumber FROM
#tblTemp)
DROP TABLE #tblTemp
RETURN
@ReturnValue
GO
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Aug 4, 2005
I try to set up a testing sample table which contain one integer project_ID field for table Sample around 500 records, and want the project_ID to be random number within 1 to 99, how to implement script todo it?
thanks!
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Oct 3, 2015
I have a function which generate random number in range :
CREATE FUNCTION Func_Rand
(
@MAX BIGINT ,
@UNIQID UNIQUEIDENTIFIER
)
RETURNS BIGINT
AS
BEGIN
RETURN (ABS(CHECKSUM(@UNIQID)) % @MAX)+1
END
GO
If you run this script you always get result between 1 and 4
SELECT dbo.Func_Rand(4, NEWID())
BUT, in this script sometimes have no result !!!!!!! why??
SELECT 'aa'
WHERE dbo.Func_Rand(4, NEWID()) IN ( 1, 2, 3, 4 )
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Sep 2, 2015
I am using Sql Server 2008 R2.I have a existing query that basically says
Select Top 50 Subscriber_ID, Â Member_Name, Group_ID
from my_table
order by rand(checksum(newid()))
However the client now wants to have at least two from each group_id. There are 17 different groups. When I run this as is I get about six of the 17 groups in the results. How can I change this to get at least two results from each group_id?
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Jun 23, 2015
Got this query and I need the following result;
declare @NumberToCompareTo int
set @NumberToCompareTo = 8
declare @table table
(
number int
)
insert into @tableÂ
select 4
[Code] ....
The query selects 4 and 5 of course. Now what I'm looking for is to retrieve the number less or equal to @NumberToCompareTo, I mean the most immediate less number than the parameter. So in this case 5
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Jun 15, 2015
I'm trying to add random dates to date column in existing table, but these need to be week days (Mon-Fri).I'm a beginner in TSQL, worked with MS Access many years - in Access I used to do something a bit different:
DateAdd("d",(Int((5*Rnd([ID]))+1)),#31/08/2015#)
Table had ID, I gave a date it would start from (31/08/2015) and then range of ID to apply new date:
UPDATE table1 SET table1 .date = DateAdd("d",(Int((5*Rnd([ID]))+1)),#31/08/2015#)
WHERE (((table1 .ID) Between 1 And 5456));
This was applying random dates in range of 31/08/2015 + 5 days, so I could give a starting date of Sunday to get random dates populated over given IDs from Monday to Friday.Now, how can I do it in TSQL?I have a table with ID and dates column. I would like to apply new random dates from some range, but making sure they will be week days.
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Aug 6, 2007
I need to be able to create completely random and unique keys for a key verification system, which would require a user to enter a pre-defined key in order to activate their account, but I need to be able to create those keys on the fly.
This is going to be a key that will be mailed to them on paper, and unfortunately means it needs to be relatively short in order to prevent too much confusion while they are typing it in.
I like the newID() function in SQL, but the ID that it creates is a bit excessive to say the least for someone to have to type when registerring.
I use C#, so I wouldn't have much of a problem creating a small app to create x number of keys, which will sit in the DB until I need them, but I would rather not have to fill the DB with a million or so ID's which might never be used, and don't want to create too little that I have to track when I might need to add more, in case I start to run low on ID's.
Re-using ID's may be an option, but I would prefer to keep them intact for the life of the accounts.
If there is something that I can do to simulate the newID() function, but generate unique/random ID's which look more like this: A97-2C5-77D than this: A972C577-DFB0-064E-1189-0154C99310DAAC12 I would be very grateful to know about it.
Thanks!
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Oct 13, 2004
As part of the credit card process I have to supply a unique transaction id.
I thought the best way to do this would be to have a file which just holds a number which I grab and increment each time some one registers. Then if everyting is alright I will write the user's details a long with the transaction id to the User file.
My question is, if two people try to register and both try to grab the next number from the file at the same time, what will happen. Will one get a record lock message, or will it wait untill the other one has finished, or could two people end up with the same number under these circumstances?
I am of course open to suggestions on the best way of approaching this, but please bare in mind that I am only using Web Matrix.
Thanks
Mark
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Nov 21, 2001
Hi,
I am new to sql server, in oracle one can get a unique number as:
create sequence my_number
increment by 1 start with 1;
select my_number.nextval from dual;
Is there any similiar mechanism in sql server? if so, how to do it?
THanks in advance,
bb
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Jul 23, 2005
Hallo,Hot to get unique, sequential number during executionof stored procedure ?I can create table with autoincrement column,add record, get ident_current and delete recordeach time i need the number.However its not elegant i guess.best regardspluton
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Jan 23, 2008
Hi to alll of you, i'm working in a project to save cars information, when the user who adds on the new record enter all the data, this will need to be printed with a particulary number, which needs to be unique, (lets take a passport number as an example) this generated number will takes some info from the filling fields, for example:
Cars Brand: BMW (catalog number: 120)
Cars Model: 325 (catalog number: 30)
Year: 2008 (catalog number: 18)
So the unique certification number will takes from the catalog numbers * 20 / 5 for example for cars Brand
for Cars Modelo: catalog number *3 + 15
CERTIFICATE NUMBER: 480-105
I'm not sure if this is possible.
I will realy thanks for your help in this issue.
Best Regards
Gian
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Jul 19, 2000
Is there wa way to generate unique sequence numbers in SQL server?
(just like the way it is in Oracle i.e. seqeuence and then use nextval)
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May 23, 2008
Hello,
I am using SQL Server 2005 and am having trouble with making a history table like mentioned in my earlier thread:
http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=102811
This is the table "People" I have created:
|PersonId (PK)|DateFrom (PK)|DateTo|PersonName|Other Attributes....
Each change to a person's attributes results in a new row formed with the same PersonId as in the row with old attributes and the Date these new attributes are valid (DateFrom). So as shown above the Primary Key is a combination of the PersonId and DateFrom as a change to a person's attributes should never happen at the same time twice.
My problem is when I want to create a new person, how do I get a new unique id? Ideally I want the a new incremented id, so that all peoples' ids are in a sequential order.
As always, thanks for the help!
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Nov 1, 2007
My team at work has spent the past week troubleshooting performance issues experienced by users of our asp.net 2.x web application. We've got a probe running on one of the web servers that has identified a frequently occuring error that no one has seen before and I can't find anywhere online. MSSQL error "system.data.oledb.oledbcommand.executenonquery(Maximum number of unique SQL exceeded) Has anyone here ever seen this error before?The web server, application, SQL servers and databases all seem to be configured properly, but users are experiencing latency and this frequently occurring error is a mystery to us.
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