計數不同的相同名稱

Question

我有超過100k信息的表。

ID  FirstName 
1   Bob 
2   Bob 
3   Tom 
4   John   
5   John 
6   John 
..   .... 

希望的過程，它會算多少名是相同的，例如，它必須是這樣的：

FirstName  Count 
Bob    2 
Tom    1 
John    3 

請幫我把它寫

Answer 1

這是非常基本的SQL例如，group by column + aggregating results

select 
    FirstName, count(*) 
from Table1 
group by FirstName 

Answer 2

試試這個

select FirstName,Count(FirstName) From TableA group by FirstName 

Answer 3

試試這個

SELECT FirstName, COUNT(*) As Count 
FROM YourTable 
GROUP BY FirstName 
HAVING COUNT(*) > 1 
ORDER BY COUNT(*) DESC 

Answer 4

Create Procedure GetCount 
as 
BEGIN 
Select FirstName,Count(*) from tablename group by FirstName 
END