SQL select calculations - mysql

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
I'm trying to recreate the website with 7 individual select statements. I'm having issues with my second select statements at the moment, The purpose of the second is to provide a totals row at the bottom like they do on the website.
( 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.)
(1st)
Main Body Select :
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
(2nd)
Total Select:
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

Looking at only the total value for the column BA it is clear that you are not doing the same calculations as them, instead of calculating average values you should calculate the ratio betweens the sum of the columns H and AB
So replace
AVG((H * 1.0) / (CASE
WHEN AB = 0 THEN 1
ELSE AB
END)) AS 'BA',
with
SUM(H) / SUM(AB) AS 'BA'
I haven't checked the other incorrect columns but I assume it's the same issue.