Microsoft Access query returning sequential numbers

Question

Is there any way to create query in MS Access which returns sequential numbers of my choice? For example

10.1
10.2
10.3
10.4
10.5

or

Answer 1

You can use a simple Cartesian Query having a table with numbers from 0 to 9:

SELECT 
    t1.Number + 
    t2.Number * 10 + 
    t3.Number * 100 + 
    t4.Number * 1000 As Factor
FROM 
    tblNumber AS t1, 
    tblNumber AS t2,
    tblNumber AS t3, 
    tblNumber AS t4

or - if you only need small series - just a table with numbers from 0 to 99.

Then for your samples:

SELECT 
    10 + 0.1 * [Number] AS [Value]
FROM 
    tblNumber
WHERE 
    [Number] Between 1 And 5

and:

SELECT 
    [Number] * 10 AS [Value]
FROM 
    tblNumber
WHERE 
    [Number] Between 2 And 10
ORDER BY 
    [Number] * 10 Desc

and:

SELECT 
    DateAdd("h", [Number], #2015-04-10 12:00 PM#) AS [Date]
FROM 
    tblNumber
WHERE 
    [Number] Between 0 And 6

Addendum

A number series can also be built without a dedicated number table by using a system table as source:

SELECT DISTINCT 
    [Tens]+[Ones] AS Factor, 
    10*Abs([Deca].[id] Mod 10) AS Tens, 
    Abs([Uno].[id] Mod 10) AS Ones
FROM 
    msysobjects AS Uno, 
    msysobjects AS Deca;

Answer 2

I think you can use a solution like this:

1. Make a table (name it t) like this:

   ID | i
   ---+---
   1  | 0
   2  | 1
   3  | 2
   4  | 3
   5  | 4
   6  | 5
   7  | 6
   8  | 7
   9  | 8
   10 | 9
   

2. Now use this table for all you need, for example make a query from 0 to 9999 use this query:

   SELECT 
       i1 + i2 * 10 + i3 * 100 + i4 * 1000 AS rowNo
   FROM 
       (SELECT 
           t1.i AS i1, t2.i AS i2 
        FROM 
           t AS t1, t AS t2) AS tt1, 
       (SELECT 
           t1.i AS i3, t2.i AS i4 
        FROM 
           t AS t1, t AS t2) AS tt2;
   

3. For example you can change rowNo formula to these:

   CDbl('10.'+CStr([i1]+[i2]*10+[i3]*100+[i4]*1000))   =>  10.1, 10.2, ...
   

   or

   (10000 - ([i1]+[i2]*10+[i3]*100+[i4]*1000)) * 10    => 100000, 99990, ... , 20, 10
   

   or

   DateAdd("h",[i1]+[i2]*10+[i3]*100+[i4]*1000,#4/10/2015 12:00:00 PM#)