如何獲取mysql中某個表中特定列的總數和總行數

Question

這很簡單，但無法弄清楚。

這裏是我的表

a  b 
--------- 
s1 prod 
s2 prod 
s3 dev 
s4 prod 
s5 dev 

我所期待是

Environment count 
prod   3 
dev   2 
total  5 

所以跟團由環境領域也找了總數的一貫遵循。

Answer 1

UPDATE：

SELECT b AS Environment, COUNT(a) AS COUNT FROM <tablename> GROUP BY b UNION SELECT 'total' AS Environment, COUNT(a) AS COUNT FROM <tablename>; 

它可以幫助你