这是我之前问题的后续,@Barmar 友好地回答了: When using MYSQL GROUP BY WITH ROLLUP on Year(date) and Month(date) i am not able to change Null to 'Total'
我有一个 SQL 查询,它从我的事务、subkategori 和kategori 表中获取数据,并且效果很好。但现在我想添加预算表并对预算金额进行求和。我的做法如下:
$stmt = $dbh->prepare("
SELECT IFNULL(Year, 'All') AS Year,
IFNULL(Month, 'All') AS Month,
IFNULL(Kategori,'All') AS Kategori,
IFNULL(Subkategori,'All') AS Subkategori,
Belopp,
Budget
FROM (
SELECT YEAR(transaktioner.datum) AS Year,
MONTH(transaktioner.datum) AS Month,
kategori.kat_namn AS Kategori,
subkategori.subkat_namn AS Subkategori,
SUM(transaktioner.belopp) AS Belopp,
SUM(budget.budgetedAmmount) AS Budget
FROM subkategori
LEFT JOIN transaktioner
ON subkategori.subkat_id=transaktioner.subkat_id
LEFT JOIN kategori
ON subkategori.kat_id = kategori.kat_id
LEFT JOIN budget
ON subkategori.subkat_id = budget.subkat_id
GROUP BY Year, Month, Kategori, Subkategori
WITH ROLLUP
) AS x
WHERE Year =".$year."
");
它给了我一个null
输出。有人可以帮我解决这个问题吗?
表格如下:
交易者
id
datum
beskrivning
overforing
belopp
balans
subkat_id
konto_id
latest_update
类别
kat_id
kat_namn
type
latest_update
子类别
subkat_id
subkat_namn
kat_id
latest_update
预算表
budget_id
subkat_id
budgetedAmmount
user_id
year
期望结果表
Year Month Kategory Subkategory Spent Budget
2017 1 Kat1 Subkat1 1000 500
2017 1 Kat1 Subkat2 500 250
2017 1 kat1 ALL 1500 750
2017 1 Kat2 Subkat1 2000 1000
2017 1 Kat2 Subkat2 450 500
2017 1 kat2 ALL 2450 1500
2017 1 ALL ALL 3950 2250
ALL ALL ALL ALL 3950 2250
参见 fiddle :http://sqlfiddle.com/#!9/35a778/2
最佳答案
这可能有助于找到答案,如下
移动 where 子句
SELECT YEAR(transaktioner.datum) AS Year, MONTH(transaktioner.datum) AS Month, kategori.kat_namn as Kategori, subkategori.subkat_namn as Subkategori, SUM(transaktioner.belopp) AS Belopp, SUM(budget.budgetedAmmount) AS Budget FROM subkategori Left JOIN transaktioner ON subkategori.subkat_id=transaktioner.subkat_id Left JOIN kategori ON subkategori.kat_id = kategori.kat_id LEFT JOIN budget ON subkategori.subkat_id = budget.subkat_id > here >> WHERE ??? GROUP BY Year, Month,Kategori,Subkategori WITH ROLLUP
如果得到结果,请直接在 MySQL 中运行该部分查询
如果得到结果,请在 MySQL 中运行完整的查询
检查您的 PHP 是否正确注入(inject)了年份参数,只需输出生成的查询代码,然后尝试在 MySQL 中运行该代码
我现在已经退出了,调试 PHP 不是“我的事”
哦,有一个小问题,与 IFNULL() 等效的 ANSI SQL 函数是 COALESCE()。虽然 IFNULL() 在 MySQL 中很好,但我鼓励您使用 COALESCE(),但显然您不必这样做。
关于mysql - SQL 分组依据和两列聚合,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/47146812/