[英]MySQL combine select sum and select query
I want to sum 4 cells for each row based on a previous query that will reduce the selection down to the important rows. 我想根据先前的查询为每行总计4个单元格,这将把选择减少到重要的行。
Basically I need to combine those two queries (which work on their own): 基本上,我需要结合这两个查询(它们可以独立工作):
SELECT columnx, SUM(`column1`+ `column2` + `column3` + `column4`) as total
FROM table GROUP BY columnx
SELECT * FROM (SELECT * FROM table ORDER BY columny DESC LIMIT 5) t
ORDER BY CASE
when `pos` = 'PG' then 1
when `pos` = 'SG' then 2
when `pos` = 'SF' then 3
when `pos` = 'PF' then 4
else 5
end asc
I tried to replace "table" with the second query but it's probably not the right way, since I'm getting errors here. 我试图用第二个查询替换“表”,但这可能不是正确的方法,因为我在这里遇到错误。
SELECT columnx, SUM(`column1`+ `column2` + `column3` + `column4`) as total FROM
(( SELECT * FROM (SELECT * FROM table ORDER BY columny DESC LIMIT 5) t
ORDER BY CASE
when `pos` = 'PG' then 1
when `pos` = 'SG' then 2
when `pos` = 'SF' then 3
when `pos` = 'PF' then 4
else 5
end asc)
GROUP BY columnx
You were supposed to create an alias name for the block replacing table
in your first query. 您应该在第一个查询中为块替换
table
创建别名。
SELECT u.columnx, SUM(u.`column1`+ u.`column2` + u.`column3` + u.`column4`) as total
FROM (SELECT t.* FROM (SELECT * FROM table ORDER BY columny DESC LIMIT 5) t
ORDER BY CASE
WHEN t.`pos`='PG' THEN 1
WHEN t.`pos`='SG' THEN 2
WHEN t.`pos`='SF' THEN 3
WHEN t.`pos`='PF' THEN 4
ELSE 5
END ASC) u GROUP BY u.columnx
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