Generate Random And Unique Number Within Sql ?
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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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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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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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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Dec 12, 2006
Hi, how do I use the Rand Function to generate a Random integer value between 1 and 20. Any help will be appreciated.
Thanks
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Jul 8, 2007
Dear All,
I have some problems with the assignment from my professor.
Suppose there are two tables storing first names and last names, one table with column of first name and gender, the other with last name.
how to write stored procedures to get a random first name + random last name for Males or Female. like you got a list of all M & F first name and last name, then you try to match first name with any other last name (I believe this is random).
and the task is to write a script so each time when a female or male full name is need, it will return a random name for the requested gender.
I am totally struck and no idea how to deal with it, in fact I am just a beginning in SQL server, and I know there is a stored procedure to generate random number, however, I can't see the use of it here,,,,:eek:
Could anyone help me out ? thanks very much !!!:beer:
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Aug 20, 2013
I need to generate random strings each of length 7 characters and update it in a table that contains employee data.For example. There is table called as Employee. It has Id, FirstName, LastName & Email as the columns. I need to mask the real names. So i have to generate random characters between a-z unique for individual records and update it in the table.
Input table
IDFirstNameLastNameEmail
1GlenJacksontest1@email.com
2ChristopherMcClaintest2@email.com
3Carol Kholertest4@email.com
4JamesDesototest5@email.com
Output table should be:
IDFirstNameLastNameEmail
1KhjkltgErstlkjtest1@email.com
2AsdlkfuAlsdkjftest2@email.com
3AlsdkflAldkjfltest4@email.com
4BasdfweAsldkfjtest5@email.com
I went through some websites for generating random characters. These provide a 7 or 8 character random letters. URL...But i do need to update 2 columns of an entire table with random characters.
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Jul 20, 2005
I need to generate a random whole number between 0 and 999 to add toadd to every record in a table. The number needs to be different foreach record in the table.How would I do this all within TSQL?
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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 13, 2005
hi
I have a field call: password, I want to generates some random chars as
default password for users (so user got something to login, and update
later).
Current Solution I have:
I made myself a trigger and it does generate password on insert, but
the problem with that is I have to allow NULL on that field. I
don't want NULL to be allowed, and if I don't allow null... sql server
won't allow me to insert a record (when leaving password field empty).
Reason i don't wanna allow NULL on that field, is because there may be
more applicaions using the same field from the same database.
Just in case if the other developer gets sloopy, I don't want other
application(s) allow user put to enter a null or leave it blank on my
password field.
My question is:
1) can I put a function or some sort at the "Default" field under "Design Table", if so...how?
2) any suggestions for a better implementation?
3) if (1) doesn't work, what other options would you suggest other then the current trigger i'm using?
TIA
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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 6, 2007
Hi Guys,
I am trying to insert a unique code, like a voucher code, into a table in MSSQL, 10 numbers (0-9) which obviously needs to be unique.
I can code this in ASP, but I think the process could be a bit long winded, i.e. create a key - run a stored procedure to see if it is free if not loop and check again. Surely there would be a way to do this in a stored procedure in one?
So the code would look like 3928492834.
1. Generate Key in SQL
2. Check if not used in column 'kcode' if it is, regenerate and check again.
Any advice would be greatly appreciated, I know how to do this in ASP but bit of a SQL newbie!
Thanks
John
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Aug 17, 2007
Is there any way to auto generate the unique primary key when inserting data in MS SQL?
there is a way to create the increasing integer as primary key, but is there any ways other than that?
thank you
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May 1, 2008
Hi
Hi
I am using sqlserver 2005 and want to generate unique numbers for all the records in a table using sql.
Something like table A has
Code:
FRUITS
-------------
Oranges
Mangoes
Apricots
....
I want to write a sql query that does something like
SELECT convert(varchar(8),getdate(),12)+'000001' my_number,
fruits
from table A
so the output is
[code]
my_number Fruits
080501000001 Oranges
080501000002 Mangoes
080501000003 Apricots
[code]
is there a way to do this without resorting to identity columns
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Jan 25, 2008
Hy all,
I'm working on a final project for school. It is a warehouse application. For this application I will need to generate a barcode. I have read some articles online and found out that I could use the code 39 barcode font.
I just don't fully understand how to generate the unique barcode. Could someone please help me? I also would like to store the barcodes in a sql server table. Could I use reports to print the barcode?
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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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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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May 1, 2008
Hi
I am using sqlserver 2005 and want to generate unique numbers for all the records in a table using sql.
Something like table A has
FRUITS
-------------
Oranges
Mangoes
Apricots
....
I want to write a sql query that does something like
SELECT convert(varchar(8),getdate(),12)+'000001' my_number,
fruits
from table A
so the output is
my_number Fruits
080501000001 Oranges
080501000002 Mangoes
080501000003 Apricots
....
regards
Hrishy
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Apr 23, 2014
I am working on an ASP.net web application which inserts new record into an underlying table.
It is actually a ConfirmationNumber and should be unique. I have used abs(checksum(newid()))
For this purpose. Is there a better way to accomplice this?
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Jun 30, 2015
I need to generate unique string Id from the range AAAAA to PZZZZ. This id will be unique for each Users for e.g.
User ---- TransactionNo ---- UniqueId
--------------------------------------------
12001 --- 101 --- AAAAA
12001 ---- 102 --- AAAAB
12001 --- 103 --- AAAAC
12001 ---- 104 --- AAAAD
13001 --- 105 --- AAAAA
13001 ---- 106 --- AAAAB
13001 --- 107 --- AAAAC
13001 ---- 108 --- AAAAD
more the records of each user, unique should be the ID as displayed above.. Optimized way to generate the same...
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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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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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Oct 19, 2015
I am trying to achieve the below problem statement, however I am getting stuck at the looping part.
EX: We have three columns
First Name |Â Last Name | Mothers Name
I want to generate the username field using above columns, so lets consider, I have following data
First Name |Â Last Name | Mothers Name
a                   b                 cdef
a                   b                 cdfg
a                   b                 cdfj
Expected Usernames:
1: a.b
2: a.b.c
3. a.b.cd
Basically, it has to be FirstName.LastName.(incremental letters from MothersName until the name becomes unique)
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