>>>>>>>Hello,
>>>>>>>
>>>>>>>I have a table with 1,500 records and with one column: ID, comprised of numeric data ranging from 1 - 1,591. As the
>>>>>>>numbers get higher, the frequency of their appearance increases. But what's important, is not so much any given value
>>>>>>>but how many numbers appear within a given range. And yes, I am trying to figure out a cutoff point that will separate
>>>>>>>this table into the numbers that appear with the highest frequency (they happen to be larger numbers, in this table)
>>>>>>>and numbers that appear less frequently (they happen to be smaller numbers.)
>>>>>>>So, I want to know if certain values appear more often than others, kind of like a heat map, except the response would
>>>>>>>be in a tabular form rather than in graphic.. Is there a way to use an SQL statement to do this? Can I preselect
>>>>>>>the number of ranges and their size, for example: break the table up into 20 ranges. But I can't know
>>>>>>>which values each of the 20 ranges will have in advance? I know it's a vague question but I wondered
>
>>>>>>>what you all might say as this kind of question is coming up a lot.
>>>>>>>
>>>>>>>Thank you,
>>>>>>>Steve
>>>>>>
>>>>>>Hi, Steve,
>>>>>>
>>>>>>Can you post the table structure (at least for the relevant columns)?
>>>>>
>>>>>table name: MY_IDS
>>>>>field name: ID
>>>>>data type: numeric
>>>>>range of values in ID: 1 - 1,591
>>>>>number of rows: 1,500
>>>>>
>>>>>(I tried to upload the dbf but the system won't allow it.)
>>>>
>>>>Try
>>>>

>>>>;with counts as (select Id, count(Id) as frequency
>>>>from My_IDS
>>>>group by Id)
>>>>
>>>>select *, NTILE(5) OVER (order by Frequency)
>>>>from counts -- group into 5 different buckets in order of the frequency

>>>>
>>>>The above is for SQL Server.
>>>
>>>Naomi, Is the first line missing something, since it begins with:
>>>
>>>

>>>;with counts as (select Id, count(Id) as frequency
>>>

>>>
>>>Thanks, Steve
>>
>>Am I supposed to start the program with the first line, because I get an error when I do:
>>
>>;with counts as (select Id, count(Id) as frequency
>
>
>I am using foxpro and mostly postgreSQL/postGIS

And postgreSQL version is?

https://www.postgresql.org/docs/9.1/static/queries-with.html
https://www.postgresql.org/docs/8.4/static/functions-window.html

MartinaJ