Counting a value only if it appears more than once in a table.

Posted 4 months ago by twoarmtom

I'm having trouble getting a count based on a special condition.

Basically, a "completed competency" is one that receives an evaluation of 3 at least two times. The following code works for counting how many distinct competencies have an evaluation of 3, but I want it to only count them if the distinct competency_id has an evaluation of 3 at least twice in the database for the specified student. Any suggestions?

$completed_competencies = DB::table('submitted_competencies')
                                ->where('student_id', 202)
                                ->where('evaluation', 3) // I want this to happen twice for the same competency_id before it is counted.
                                ->distinct('competency_id')
                                ->count('competency_id');

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