How to generate a range of numbers between two num

Question

I have two numbers as input from the user, like for example 1000 and 1050.

How do I generate the numbers between these two numbers, using a sql query, in seperate rows? I want this:

 1000
 1001
 1002
 1003
 .
 .
 1050

Answer 1

It work for me !

select top 50 ROW_NUMBER() over(order by a.name) + 1000 as Rcount
from sys.all_objects a

Answer 2

If you don't have a problem installing a CLR assembly in your server a good option is writing a table valued function in .NET. That way you can use a simple syntax, making it easy to join with other queries and as a bonus won't waste memory because the result is streamed.

Create a project containing the following class:

using System;
using System.Collections;
using System.Data;
using System.Data.Sql;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Server;

namespace YourNamespace
{
   public sealed class SequenceGenerator
    {
        [SqlFunction(FillRowMethodName = "FillRow")]
        public static IEnumerable Generate(SqlInt32 start, SqlInt32 end)
        {
            int _start = start.Value;
            int _end = end.Value;
            for (int i = _start; i <= _end; i++)
                yield return i;
        }

        public static void FillRow(Object obj, out int i)
        {
            i = (int)obj;
        }

        private SequenceGenerator() { }
    }
}

Put the assembly somewhere on the server and run:

USE db;
CREATE ASSEMBLY SqlUtil FROM 'c:\path\to\assembly.dll'
WITH permission_set=Safe;

CREATE FUNCTION [Seq](@start int, @end int) 
RETURNS TABLE(i int)
AS EXTERNAL NAME [SqlUtil].[YourNamespace.SequenceGenerator].[Generate];

Now you can run:

select * from dbo.seq(1, 1000000)

Answer 3

Nothing new but I rewrote Brian Pressler solution to be easier on the eye, it might be useful to someone (even if it's just future me):

alter function [dbo].[fn_GenerateNumbers]
(   
    @start int,
    @end  int
) returns table
return

with 
b0 as (select n from (values (0),(0x00000001),(0x00000002),(0x00000003),(0x00000004),(0x00000005),(0x00000006),(0x00000007),(0x00000008),(0x00000009),(0x0000000A),(0x0000000B),(0x0000000C),(0x0000000D),(0x0000000E),(0x0000000F)) as b0(n)),
b1 as (select n from (values (0),(0x00000010),(0x00000020),(0x00000030),(0x00000040),(0x00000050),(0x00000060),(0x00000070),(0x00000080),(0x00000090),(0x000000A0),(0x000000B0),(0x000000C0),(0x000000D0),(0x000000E0),(0x000000F0)) as b1(n)),
b2 as (select n from (values (0),(0x00000100),(0x00000200),(0x00000300),(0x00000400),(0x00000500),(0x00000600),(0x00000700),(0x00000800),(0x00000900),(0x00000A00),(0x00000B00),(0x00000C00),(0x00000D00),(0x00000E00),(0x00000F00)) as b2(n)),
b3 as (select n from (values (0),(0x00001000),(0x00002000),(0x00003000),(0x00004000),(0x00005000),(0x00006000),(0x00007000),(0x00008000),(0x00009000),(0x0000A000),(0x0000B000),(0x0000C000),(0x0000D000),(0x0000E000),(0x0000F000)) as b3(n)),
b4 as (select n from (values (0),(0x00010000),(0x00020000),(0x00030000),(0x00040000),(0x00050000),(0x00060000),(0x00070000),(0x00080000),(0x00090000),(0x000A0000),(0x000B0000),(0x000C0000),(0x000D0000),(0x000E0000),(0x000F0000)) as b4(n)),
b5 as (select n from (values (0),(0x00100000),(0x00200000),(0x00300000),(0x00400000),(0x00500000),(0x00600000),(0x00700000),(0x00800000),(0x00900000),(0x00A00000),(0x00B00000),(0x00C00000),(0x00D00000),(0x00E00000),(0x00F00000)) as b5(n)),
b6 as (select n from (values (0),(0x01000000),(0x02000000),(0x03000000),(0x04000000),(0x05000000),(0x06000000),(0x07000000),(0x08000000),(0x09000000),(0x0A000000),(0x0B000000),(0x0C000000),(0x0D000000),(0x0E000000),(0x0F000000)) as b6(n)),
b7 as (select n from (values (0),(0x10000000),(0x20000000),(0x30000000),(0x40000000),(0x50000000),(0x60000000),(0x70000000)) as b7(n))

select s.n
from (
    select
          b7.n
        | b6.n
        | b5.n
        | b4.n
        | b3.n
        | b2.n
        | b1.n
        | b0.n
        + @start
         n
    from b0
    join b1 on b0.n <= @end-@start and b1.n <= @end-@start
    join b2 on b2.n <= @end-@start
    join b3 on b3.n <= @end-@start
    join b4 on b4.n <= @end-@start
    join b5 on b5.n <= @end-@start
    join b6 on b6.n <= @end-@start
    join b7 on b7.n <= @end-@start
) s
where @end >= s.n

GO

Answer 4

Here's what I came up with:

create or alter function dbo.fn_range(@start int, @end int)  returns table
return
with u2(n) as (
    select n 
    from (VALUES (0),(1),(2),(3)) v(n)
), 
u8(n) as (
    select
        x0.n | x1.n * 4 | x2.n * 16 | x3.n * 64 as n
    from u2 x0, u2 x1, u2 x2, u2 x3
)
select 
    @start + s.n as n
from (
    select
        x0.n | isnull(x1.n, 0) * 256 | isnull(x2.n, 0) * 65536 as n
    from u8 x0 
    left join u8 x1 on @end-@start > 256
    left join u8 x2 on @end-@start > 65536
) s
where s.n < @end - @start

Generates up to 2^24 values. Join conditions keep it fast for small values.

Answer 5

This only works for sequences as long as some application table has rows. Assume I want sequence from 1..100, and have application table dbo.foo with column (of numeric or string type) foo.bar:

select 
top 100
row_number() over (order by dbo.foo.bar) as seq
from dbo.foo

Despite its presence in an order by clause, dbo.foo.bar does not have to have distinct or even non-null values.

Of course, SQL Server 2012 has sequence objects, so there's a natural solution in that product.

Answer 6

The best speed when run query

DECLARE @num INT = 1000
WHILE(@num<1050)
begin
 INSERT  INTO [dbo].[Codes]
    (   Code
    ) 
    VALUES (@num)
    SET @num = @num + 1
end