mysql - How to count tuples containing the same value? -


suppose these columns:

 **name**     **course**    andy          bio             brian         math    andy          chem

how can count name "andy" appeared twice?

you use group , count name

something like:

select name, count(*) my_table group name

here's sqlfiddle demonstrate: http://sqlfiddle.com/#!2/966da/1


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