我怎麼知道一個值出現在mysqli的選擇的次數

Question

請我怎麼知道的次數大衛的2

投票

Name | Vote 
------------- 
|Gabri| 2 
|David| 2 
|Janny| 3 
|David| 1 
|David| 2 
|Fally| 3 

Answer 1

$sql = "SELECT count(*) from table_name WHERE Name= 'David' and Vote=2"; 
$result = mysqli_query($con, $sql); 
$fetch = mysqli_fetch_assoc($result); 
echo "<pre>"; 
print_r($fetch); 
echo "<pre>"; 

輸出

Array 
(
    [count(*)] => 4 
) 

以獲得您需要的值echo $fetch['count(*)']; //outputs 4

Answer 2

select Name , count(Name) where Name = 'David' group by Name having count(Name) =2