計數包含相同值的行數

Question

什麼是MySQL查詢來計算包含相同值的行總數。 例如：

考慮包含所有動物名稱的表animal。如果表中有5行包含值name爲'cow'那麼對它的查詢會是什麼？

Answer 1

SELECT animal_name, 
     COUNT(*) AS animal_count 
FROM animal_table 
GROUP BY animal_name; 

Answer 2

SELECT COUNT(*) AS CowCount 
FROM tableName 
where animalName = 'cow'; 

Answer 3

SELECT name, COUNT(*) c FROM animal WHERE name='cow' GROUP BY name