How can I get integer output from a sql execution using F#

Question

I am new in F#. So that I face some problem in my project.

let getTotalNoOfSmsPerDay (Db cStr) =
    use cmd = new SqlCommandProvider<"select COUNT(id) as NoOfSMS 
                                      from transport.SmsNotification 
                                      where CONVERT(date, CreatedOn) = CONVERT(date, GETDATE())
                                     ",ConnectionString, SingleRow = true>(cStr)
    async {
         let! result = cmd.AsyncExecute()
         return result
     }

This is my Code. I just want a integer number NoOfSMS . But It gives me <Option<int>> How can I solve this?

Thanks in advance

Answer 1

Option represents that nothing may be returned. This is the point where most other languages would return null .

There are a few ways to use the value inside Option . Explore the functions available.

Often what you will do though is to match on the 2 cases ie. Some value was returned or None .

match result with
| Some v -> v
| None -> 0

Here are some links to tutorials I have written on the topics.

Control flow
Pattern matching
Handling no data