MySQL查詢環路組列單查詢

Question

我有一個表結構如下：

Table1 
    +----------------+-------------+ 
    | ID | Condition | Color  | 
    +----------------+-------------+ 
    | 1 | FAIR  | RED   | 
    +----------------+-------------+ 
    | 2 | GOOD  | Red   | 
    +----------------+-------------+ 
    | 3 | Great  | BLACK  | 
    +----------------+-------------+ 
    | .. | ..  | ..   | 
    +----------------+-------------+ 

我想對於顏色來算的所有條件。因此，一個簡單的查詢將是：

SELECT COUNT(ID) Total FROM Table1 WHERE Condition="FAIR" AND Color="RED" 

這將返回條件爲FAIR且顏色爲紅色的行數。是否有可能包含所有可能的結果？那麼，一個表爲單個查詢提供所有條件的count（id），而不是具有多個查詢？

+----------------+-------------+ 
    | Total | Condition | Color | 
    +----------------+-------------+ 
    | 5 | FAIR  | RED  | 
    +----------------+-------------+ 
    | 6 | FAIR  | BLUE  | 
    +----------------+-------------+ 
    | 2 | Great  | RED  | 
    +----------------+-------------+ 
    | .. | ..  | ..  | 
    +----------------+-------------+ 

條件和顏色有一組固定值，空值除外。

Answer 1

聽起來你正在尋找group by：

SELECT COUNT(ID) Total, Condition, Color 
FROM Table1 
GROUP BY Condition, Color