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[英]How to retrieve record match memberID, month and year from sql database
[英]SQL Query to retrieve month name from database
我跟着查询,我想要做的是,我只想从日期列中查看月份名称,在下面的查询中显示月份编号
SELECT MONTH(Invoice_Date), SUM(R.Total) AS TOTAL
FROM Sales R
GROUP BY MONTH(Invoice_Date)
ORDER BY MONTH(Invoice_Date);
我尝试了MonthName函数,我也试过转换函数,但没有一个工作。 显示以下错误未定义的功能。 请帮助,谢谢
尝试MS SQL的datepart函数http://msdn.microsoft.com/en-us/library/ms174420.aspx
MS sql查询将是:
SELECT
DATEPART(month,Invoice_Date),
SUM(R.Total) AS TOTAL
FROM Sales R
GROUP BY DATEPART(month,Invoice_Date)
ORDER BY DATEPART(month,Invoice_Date)
假设Invoice_Date“是一个可以解析为time,date,smalldatetime,datetime,datetime2或datetimeoffset值的表达式.date可以是表达式,列表达式,用户定义变量或字符串文字。”
假设您只使用MS Access而不使用SQL Server,因此不能使用T-SQL函数,一种方法是使用这样的switch
函数:
SELECT SWITCH(
MONTH(invoice_date) = 1, "January",
MONTH(invoice_date) = 2, "February",
MONTH(invoice_date) = 3, "March"
MONTH(invoice_date) = 4, "April"
MONTH(invoice_date) = 5, "May"
MONTH(invoice_date) = 6, "June"
MONTH(invoice_date) = 7, "July"
MONTH(invoice_date) = 8, "August"
MONTH(invoice_date) = 9, "September"
MONTH(invoice_date) = 10, "October"
MONTH(invoice_date) = 11, "November"
MONTH(invoice_date) = 12, "December"
) AS MonthName, SUM(R.Total) AS TOTAL
FROM Sales R
GROUP BY MONTH(Invoice_Date)
ORDER BY MONTH(Invoice_Date);
另一种选择是创建一个包含月份名称和数字的表,并通过连接从中检索名称。
是的,使用T-SQL可以从日期的月份编号获取月份名称。
SELECT DATENAME(month, DATEADD(month, MONTH(Invoice_Date), 0 ) -1);
然后,您的最终查询将如下所示:
SELECT MONTH(Invoice_Date), DATENAME(month, DATEADD(month, MONTH(Invoice_Date), 0 ) -1) as MonthName, SUM(R.Total) AS TOTAL
FROM Sales R
GROUP BY MONTH(Invoice_Date)
ORDER BY MONTH(Invoice_Date);
尝试这个
SELECT DATENAME(month, Invoice_Date), SUM(R.Total) AS TOTAL
FROM Sales R
GROUP BY DATENAME(month, Invoice_Date)
ORDER BY DATENAME(month, Invoice_Date);
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