从列中选择值，而在另一个累积中有多个值

Question

I have table X with 2 columns : ID , name

I need to select only the names with more than 1 ID (and count how much ID those name has)

table X

|namme|ID  |
------------
|A    |1   |
------------
|A    |2   |
------------
|B    |1   |
------------
|C    |1   |
------------
|C    |4   |
------------
|C    |7   |
------------

from the table bellow the answer will be like:

|namme|ID Count|
----------------
|A    |2       |   
----------------
|C    |3       |   
----------------

name A has 2 IDs

name C has 3 IDs

Answer 1

Try, like:

   SELECT Name
    ,COUNT(ID)
FROM Xtable
GROUP BY Name
HAVING COUNT(ID) > 1

Answer 2

use aggregate function count()

 select name,count(*) as cnt from table  group by name
 having count(*)>1