MySQL計數記錄條件，選擇多個字段

Question

我正在嘗試使用計數用例來對某一列中的記錄進行計數（runs.Finish），如果它們等於一個。

當我像下面第三行中那樣添加計數大小寫時，我似乎無法使它正常工作。

SELECT
  `jockeys`.`JockeyInitials`,
  `jockeys`.`JockeySurName` ,
  COUNT(  `runs`.`JockeysID` ), 
  COUNT( CASE WHEN `runs`.`Finish`=1 THEN 1 ELSE NULL END ) AS `runs`.`Finish` , 
  SUM(  `runs`.`StakeWon` ) 
FROM runs, jockeys
WHERE  `runs`.`JockeysID` =  `jockeys`.`JockeysID` 
  AND  `runs`.`JockeysID` >=1
  AND  `runs`.`JockeysID` <=100
GROUP BY  `runs`.`JockeysID`

Answer 1

您的查詢應該是（檢查列和案例語句列的別名）

SELECT
  `jockeys`.`JockeyInitials`,
  `jockeys`.`JockeySurName` ,
  COUNT(  `runs`.`JockeysID` ), 
  COUNT( CASE WHEN `runs`.`Finish`=1 THEN 1 ELSE NULL END ) AS `Finish` , 
  SUM(  `runs`.`StakeWon` ) 
FROM runs, jockeys
WHERE  `runs`.`JockeysID` =  `jockeys`.`JockeysID` 
  AND  `runs`.`JockeysID` >=1
  AND  `runs`.`JockeysID` <=100
GROUP BY  `jockeys`.`JockeyInitials`,
  `jockeys`.`JockeySurName`