重复的行数

Question

表tbl1

字段id,name

id = 1 name = a

id = 1 name = a

id = 1 name = w

id = 1 name = f

id = 2 name = c

id = 2 name = a

如何获得重复的场数。 id = 1，name = a ==＆gt; 2

Answer 1

很简单

select
  id,
  name,
  count(*)
from
  table
group by
  id, name