How to Correctly Query for Dates Greater Than a Specific Value in SQL Server?

Querying for Dates Greater Than a Specific Value in SQL Server

When attempting to query for dates greater than a certain date in SQL Server using the following code snippet:

SELECT * 
FROM dbo.March2010 A
WHERE A.Date >= 2010-04-01;

you may encounter an unexpected error. This is because the date value 2010-04-01 is interpreted as a mathematical expression by SQL Server, effectively converting it to 2005. To resolve this issue, it is necessary to convert the date value to a proper datetime format using the Convert function:

SELECT *  
FROM dbo.March2010 A 
WHERE A.Date >= Convert(datetime, '2010-04-01' )

Alternatively, you could explicitly enclose the date value in single quotes, which would also trigger the conversion:

SELECT *  
FROM dbo.March2010 A 
WHERE A.Date >= '2010-04-01'

While the latter approach is technically acceptable, it is generally considered less readable and less maintainable. By explicitly using the Convert function, you make the conversion more apparent to future maintainers.

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