Question

如何在汇总或汇总函数等方面进行汇总？

ROUND(SUM(T.TICKET_PRICE),2)

例如：

SELECT EmpId, Yr, SUM(Sales) AS Sales
FROM Sales
GROUP BY EmpId, Yr WITH ROLLUP

Answer 1

我能想到的最好的事情是 -

SELECT EmpId, Yr,
       CASE WHEN EmpId IS NULL AND Yr IS NULL
            THEN ROUND(SUM(Sales))
            ELSE SUM(Sales)
       END AS Sales
FROM Sales
GROUP BY EmpId, Yr WITH ROLLUP

不幸的是，如果EmpId和Yr为NOT NULL，这只会有效。

Answer 2

将汇总放在子查询中：

SELECT R.EmpID, R.Yr, ROUND(R.Sales,2) AS Sales
FROM (
    SELECT EmpId, Yr, SUM(Sales) AS Sales
    FROM Sales
    GROUP BY EmpId, Yr WITH ROLLUP) R

Answer 3

你是如此接近，只需用圆函数包装你的总和。

SELECT EmpId, Yr, round(SUM(Sales),2) AS Sales
FROM Sales
GROUP BY EmpId, Yr

如何舍入汇总SQL查询？

3 个答案: