Question

Fox Pro 9 Max number of fields in a table

Asked by: Malibucompany

Any one know for sure the Max number of fields that a table can contain in Fox 9 SP2  .  I believe it is 255.   Cant find it in the dox anywhere.  Microsoft wants to charge me for tek support to answer.
IF you can belive that

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Asked On
2009-09-14 at 09:48:20ID24730174
Tags

Fox Pro 9 field Max

Topic

FoxPro Database

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Answers

 

by: tusharkanvindePosted on 2009-09-14 at 10:52:57ID: 25327717

You can check "Visual Foxpro System Capacities" in the help on VFP.

It is 255 fields if there are no nullable fields in the table, else it is 254

 

by: pcelbaPosted on 2009-09-14 at 11:18:57ID: 25327934

Simple test can tell

CREATE TABLE maxcol (a001 c(1) null)
FOR i = 2 TO 300
  TRY
    ALTER table maxcol ADD ('a'+TRANSFORM(i,'@L 999')) c(1)
  CATCH
    ? "Max number of columns:", i-1
    CANCEL
  ENDTRY 
NEXT
                                              
1:
2:
3:
4:
5:
6:
7:
8:
9:

Select allOpen in new window

 

by: CaptainCyrilPosted on 2009-09-14 at 12:10:50ID: 25328339

If you need lots of fields, you can change the structure in a way to name the field and its value:

RECNO N(10), field C(20), value M

Or if you have way too many records, why not use a txt file or CSV file and you can import what you wish in one command using APPEND

No need to write Microsoft. I wonder if they could help!

 

by: jrbbldrPosted on 2009-09-14 at 13:24:28ID: 25328979

if you need over 255 fields I might suggest that you look very hard at how well you are Normalizing your data and the associated data tables.

Even if you don't need to utilize additional tables for Normalization purposes, you could still use multiple related tables to extend the number of fields available to you for any given KeyID.

Good Luck

 

by: CaptainCyrilPosted on 2009-09-14 at 22:41:07ID: 25332001

I know some people create multiple records for the same field:

Telephone1
Telephone2
Telephone3

It would be best if you translate these into records.

 

by: Olaf_DoschkePosted on 2009-09-15 at 00:01:18ID: 25332382

If you phone MS, of course they will tell you to pay for tek support. Not being able to enter "limit" or "maximum" or "cpacities" into Fox's help search needs to be punished, of course ;)

http://msdn.microsoft.com/en-us/library/3kfd3hw9%28VS.80%29.aspx

Bye, Olaf.

 

by: tusharkanvindePosted on 2009-09-15 at 00:19:24ID: 25332491

I will agree with jrbbldr. A 255 column table needs to be relooked at.

 

by: MalibucompanyPosted on 2009-09-15 at 09:13:42ID: 31628493

Great People !! Thank You

20120131-EE-VQP-002

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