>>>>>>>Hi,
>>>>>>>
>>>>>>>I am trying to count unique values in the field (using SQL Select) if the value is greater than 0
>>>>>>>
>>>>>>>So, here is syntax I use (simplified) (which generates an error):
>>>>>>>

>>>>>>>select count( case when mytable.myfield = 0 then 0 else distinct( mytable.myfield ) end ) as TotCount
>>>>>>>

>>>>>>>
>>>>>>>What is wrong in the above syntax?
>>>>>>>
>>>>>>>TIA
>>>>>>
>>>>>>

select count( distinct  mytable.myfield ) as TotCount from myTable where mytable.myfield <> 0

>>>>>
>>>>>The SQL Select must include all records, even those that have the value of mytable.myfield equal to 0 (zero). So I cannot use the WHERE as you suggested.
>>>>>Please see Naomi's reply as the solution.
>>>>>Thank you.
>>>>
>>>>How is that different, other than doing the same thing in an unnecessarily peculiar way?
>>>>
>>>>Here is demo link:
>>>>
>>>>https://dbfiddle.uk/?rdbms=sqlserver_2017&fiddle=5ff29037f75de1d5939272329523c434
>>>
>>>Here is an example of a table and the result I am trying to get. Let me know how I would apply your approach to it:
>>>
>>>

>>>Sample table
>>>
>>>FIELD1      FIELD2
>>>ABC           1
>>>CBS           2
>>>ABC           1
>>>NBC           3
>>>NBC           2
>>>CBS           0
>>>ABC           1
>>>NBC           0
>>>NBC           0
>>>CBS           2
>>>CBS           0
>>>CBS           3
>>>ABC           0
>>>XYZ           0
>>>NBC           5
>>>NBC           5
>>>XYZ           0
>>>
>>>Report                    Explanation
>>>ABC          1           There is only 1 value of ABC (other than 0)
>>>CBS          2            There are 2 different values of CBS (other than 0)
>>>NBC          3           There are 3 different values of NBC (other than 0)
>>>XYZ          0           There are no different value of XYZ (other than 0)
>>>

>>
>>I would do it like this:
>>

>>SELECT DISTINCT cuTest.Field1, ISNULL(cuCount.Count,0)
>>		FROM cuTest
>>		LEFT JOIN (SELECT cuCount.Field1, COUNT(DISTINCT(cuCount.Field2)) AS Count
>>			FROM cuTest cuCount
>>			WHERE cuCount.Field2 > 0
>>			GROUP BY cuCount.Field1)
>>			AS cuCount
>>		ON cuCount.Field1 == cuTest.Field1
>>

>
>Your code will probably work (I have not tested it). But it looks, kind of, over complicated.
>
>The actual case I have has the following code:
>

>select FIELD1, COUNT( DISTINCT( FIELD2 ) ) AS TotCount From MyTable group by FIELD1
>

>
>The above SQL Select (of course the above one is simplified) worked for many year. But I noticed that it would always add an extra 1 to the TotCount (counting FIELD2 = 0 too). So, I was looking for a way to modify the DISTINCT() to exclude the 0 values.
>Naomi's approach works well:
>
>

>  count( distinct( case when FIELD2!=0 then FIELD2 end ) ) as TotCount 
>

The reason why I often use subselect is because the query should run also in VFP. You never know if you need to port queries into another database at one time.

I never knew about using case with NULL, it's very neat, but does not work in VFP. I also have not seen this in MySQL, but I might be wrong.