mysql - SQL选择计算

Question

Below are the things I'm using

• lahman's baseball -database

• 2015 SQL version of the database.

• Microsoft SQL server management studio v17.7

• I'm using "Los Angeles Dodgers" statistics and I'm basing my selects of the website and pulling from the above database Website for ESPN Los Angeles Dodgers

我正在尝试使用 7 个单独的选择语句重新创建网站。我目前对第二个选择语句有疑问，第二个选择语句的目的是在底部提供总计行，就像在网站上一样。

( So my main question is can someone help with fixing my second select.)

( My second question can i get some assistance on creating 5 other selects statements that correspond with the image below.)

(第一) 主体选择:

SELECT
  nameFirst + ' ' + nameLast AS Name,
  G AS GP,
  AB,
  R,
  H,
  H - B2 - B3 - HR AS S,
  B2 AS '2B',
  B3 AS '3B',
  HR,
  RBI,
  (((H - B2 - B3 - HR) * 1.0) + (B2 * 2) + (B3 * 3) + (HR * 4)) AS 'TB',
  BB,
  SO,
  SB,
  (H * 1.0) / (CASE
    WHEN AB = 0 THEN 1
    ELSE AB
  END) AS 'BA',
  (CASE
    WHEN (H + BB + HBP) = 0 THEN 0
    ELSE ((H + BB + HBP) * 1.0)
  END) / (CASE
    WHEN (AB + BB + HBP) = 0 THEN 1.0
    ELSE ((AB + BB + HBP) * 1.0)
  END) AS 'OBP',
  (CASE
    WHEN (((H - B2 - B3 - HR) * 1.0) + (B2 * 2) + (B3 * 3) + (HR * 4)) = 0 THEN 0
    ELSE (((H - B2 - B3 - HR) * 1.0) + (B2 * 2) + (B3 * 3) + (HR * 4))
  END) / (CASE
    WHEN AB = 0 THEN 1
    ELSE AB
  END) AS 'SLG',
  (CASE
    WHEN (H + BB + HBP) = 0 THEN 0
    ELSE ((H + BB + HBP) * 1.0)
  END) / (CASE
    WHEN (AB + BB + HBP) = 0 THEN 1.0
    ELSE ((AB + BB + HBP) * 1.0)
  END) +
  (CASE
    WHEN (((H - B2 - B3 - HR) * 1.0) + (B2 * 2) + (B3 * 3) + (HR * 4)) = 0 THEN 0
    ELSE (((H - B2 - B3 - HR) * 1.0) + (B2 * 2) + (B3 * 3) + (HR * 4))
  END) / (CASE
    WHEN AB = 0 THEN 1
    ELSE AB
  END) AS 'OPS'
FROM Players
LEFT OUTER JOIN Batting
  ON Players.playerIDpk = Batting.playerID
WHERE teamID = 'LAN'
AND yearID = '2012'
ORDER BY BA DESC

Click Here - For Image of above select output

(第二) 总选择:

SELECT
  '' AS Total,
  '162' AS 'GP',
  SUM(AB) AS 'AB',
  SUM(R) AS 'R',
  SUM(H) AS 'H',
  SUM(B2) AS '2B',
  SUM(B3) AS '3B',
  SUM(HR) AS HR,
  SUM(RBI) AS RBI,
  SUM((((H - B2 - B3 - HR) * 1.0) + (B2 * 2) + (B3 * 3) + (HR * 4))) AS 'TB',
  SUM(BB) AS BB,
  SUM(SO) AS 'SO',
  SUM(SB) AS 'SB',
  AVG((H * 1.0) / (CASE
    WHEN AB = 0 THEN 1
    ELSE AB
  END)) AS 'BA',
  AVG((CASE
    WHEN (H + BB + HBP) = 0 THEN 0
    ELSE ((H + BB + HBP) * 1.0)
  END) / (CASE
    WHEN (AB + BB + HBP) = 0 THEN 1.0
    ELSE ((AB + BB + HBP) * 1.0)
  END)) AS 'OBP',
  AVG((CASE
    WHEN (((H - B2 - B3 - HR) * 1.0) + (B2 * 2) + (B3 * 3) + (HR * 4)) = 0 THEN 0
    ELSE (((H - B2 - B3 - HR) * 1.0) + (B2 * 2) + (B3 * 3) + (HR * 4))
  END) / (CASE
    WHEN AB = 0 THEN 1
    ELSE AB
  END)) AS 'SLG',
  AVG((CASE
    WHEN (((H - B2 - B3 - HR) * 1.0) + (B2 * 2) + (B3 * 3) + (HR * 4)) = 0 THEN 0
    ELSE (((H - B2 - B3 - HR) * 1.0) + (B2 * 2) + (B3 * 3) + (HR * 4))
  END) / (CASE
    WHEN AB = 0 THEN 1
    ELSE AB
  END)) AS 'OPS'
FROM Players
LEFT OUTER JOIN Batting
  ON Players.playerIDpk = Batting.playerID
WHERE teamID = 'LAN'
AND yearID = '2012'

Here's what my total select returns and its incorrect.

Below is what it should return when i run the select for totals i don't know what i did wrong.

Answer 1

仅查看BA列的总值，很明显您没有进行与它们相同的计算，您应该计算列总和之间的比率，而不是计算平均值H 和 AB

所以替换

AVG((H * 1.0) / (CASE
  WHEN AB = 0 THEN 1
  ELSE AB
END)) AS 'BA',

与

SUM(H) / SUM(AB) AS 'BA'

我没有检查其他不正确的列，但我认为这是同样的问题。