SQL服務器：鑑於一年找到年以前的一切（含），並給予一年

Question

我不熟悉SQL Server語法，但我想它會去是這樣的：

$year = 2010; 

$query = mssql_query("SELECT * FROM dbo.events 
         WHERE date BETWEEN $year AND $year-1"); 

我米只是不知道如何格式$年在這種情況下。

Answer 1

你很近。假設date列是datetime數據類型：

SELECT * 
    FROM dbo.events 
    WHERE DATEPART(year, date) BETWEEN $year-1 AND $year 

Answer 2

SQL Server具有YEAR function，這甚至短於DATEPART寫：

select * from dbo.events where year(date) between $year-1 and $year 

Answer 3

試試這個：

declare @year int 
set @year=2010 

select * from FROM dbo.events 
WHERE cast(YEAR([date]) as int) <= @year 
and cast(YEAR([date]) as int) >= @year-1 

Answer 4

你試圖選擇只有一年？

這個工作對我來說：

$year = 2011; 
select * from table where year(date_field) = $year