Question

我的问题是显示工作日而不是日期。在片刻，这是有效的：

SELECT
Sum(PostQuantity) AS Amount, 
to_char(PostingDate, 'dd-mm-yyyy') AS Day
FROM 
table1
GROUP BY to_char(PostingDate, 'dd-mm-yyyy') 
ORDER BY to_char(PostingDate, 'dd-mm-yyyy')

但这会显示日期。添加以下功能：

SELECT
Sum(PostQuantity) AS Amount, 
DatePart(Weekday,PostingDate) AS Day

或

SELECT
Sum(PostQuantity) AS Amount, 
DateName(dw,PostingDate) AS Day

不起作用。我认为我的问题是使用了PostingDate运算符中的SELECT，但我尝试修复它并不起作用。

Answer 1

我没有在您的代码中看到问题，但有时会尝试替代方案。试试这个：

SELECT SUM(t.postQuantity) as amount,
       TO_CHAR(t.PostingDate,'DAY') as dayOfTheWeek
FROM YourTable t
GROUP BY TO_CHAR(t.PostingDate,'DAY')

Dy会给你前三个字母。

Answer 2

如果它在sql

上，你可以使用DATENAME功能

SELECT DATENAME(WEEKDAY,[Date])
FROM Table1

在Oracle中

select to_char(to_date('03/09/1982','dd/mm/yyyy'), 'DY')

SQL：将Date转换为WeekDay不起作用

2 个答案: