below code will generate 1to 50 numbers.

WITH cte
AS (
SELECT 1 AS n
UNION ALL
SELECT n + 1 FROM cte WHERE n < 50
)
SELECT * FROM cte

I am trying to generate sequence number with following condition.Can you please help me out.

1.Single Select Query
2.Not to use row number function

Thanks for help in advance….

Kamesh

or More Complicated one with String + Numeric generating IDs:

select ‘SNO’ + REPLICATE(’0′,5-len(cast(isnull(max(cast(right(ColumnName,5) as int)),0) + 1 as varchar(20)))) + cast(isnull(max(cast(right(ColumnName,5) as int)),0) + 1 as varchar(20)) As AliasColumnName from TableName

CREATE FUNCTION SequenceTable (@startNum INT, @endNum INT)
RETURNS @tmptbl TABLE ( counter INT )
AS
BEGIN
WHILE (@startNum <= @endNum)
BEGIN
INSERT INTO @tmptbl SELECT @startNum
SELECT @startNum = @startNum + 1
END
RETURN
END

Now you can use it to dynamically return a sequence of numbers:

SELECT * FROM SequenceTable (0, 30)

This was usefully for our purposes to return the next 30 days for a report (to be LEFT JOIN'ed to the data table which might not contain values for each day)

SELECT DATEADD(d, counter, GetDate()) AS SeqDate FROM SequenceTable (0, 30)

create table tblSequence
(
Id int identity(1,1) primary key,
Sname varchar(50),
subject_Name varchar(50)
)

insert into tblSequence (Sname,Subject_Name)
SELECT ‘C’,'English’ union all
SELECT ‘A’,'Mathematics’ union all
SELECT ‘A’,'Science’ union all
SELECT ‘B’,'Econamics’ union all
SELECT ‘B’,'Acturian science’ union all
SELECT ‘B’,'Mathematics’ union all
SELECT ‘C’,'Mathematics’

select SName,Subject_Name ,
Row_Number() over(partition by sname order by id) as RowNumber
from tblSequence

For example, I have a student table with multiple rows for a student, as below –

Student Subject

A English
A Mathematics
A Science
B Economics
B Acturian science
C Mathematics

I need a seq-no to be appended to each of the above records such that the sequence number resets once the student changes –

Student Subject Generated seq-no

A English 0
A Mathematics 1
A Science 2
B Economics 0
B Acturian science 1
C Mathematics 0

In short, I’m looking for a sequence genrator that works with a group by sort of a thing.
Is there a way to do this using SQL

DECLARE @id int
set @id = 0
UPDATE mytable SET id = @id, @id = @id + 1

How can this Primary Key be acquired in SQL. Is it Possible?

I tried this statement and it worked. Thanks a lot. Keep Posting.

Thanks
Nilesh

SELECT (ROW_NUMBER() OVER ( ORDER BY fieldname)) AS ID from tablename

Is it possible to store in a single variable like as below

1,2,3,4 and so on. Output can be shown in this format.

Here’s what I did…

Create a table with one column, I chose “id” as an “int” type.

Create a stored procedure, mine was “reserve_ordernumber” and was short and sweet.

DECLARE @id int
UPDATE order_sequence SET id = id + 1, @id = id + 1
SELECT @id AS ‘id’

Voila! – You can then call the procedure and have it return a unique integer from a linear number sequence.

If stored procedures aren’t your thing, you could really do this a number of ways by mutating things here and there. (e.g. trigger (instead-of), scalar value function, etc…)

Hope that helps.

Most likely the asker wanted to know how to do this in a table. in a table, you would use an identity column, not a while loop.