In a database we have about 1000 registered users. I'd like to know how many of those users have actually written a question or posted an answer. All the information can be take from the tblQA table and the userid is "intPosterID", the questions & answers each have their own ID, "PostID". Is there a query that can be run to count how many unique users have posted a question or answer?
mySQL query to count number of unique users posting to database
- Thread starter tuanzilla
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