SQL Comparison between dates

Question

SQL Comparison between dates

Sarvesh Pandey 71

Hi All,
On 5th of December 2022, I have created a table with date 5/12/2022.

Now when i am running the below query it is showing no recods. Note - getdate() = 5/12/2022

Getdate() - ![266919-image.png ]2

Table detail -

SQL Query -
select * from BusinessDays where Convert(varchar(2),Datepart(day,getdate())) = convert(varchar(2),'Business Day');

I have also use CAST function but still getting no ouputs

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Answer 1

Sreeju Nair 12,666

in your query, refer to the following part,

convert(varchar(2), 'Business Day')

Replace 'Business Day' to the column name Business Day and your query will work.

select * from BusinessDays where Convert(varchar(2), DatePart(day, getdate())) = convert(varchar(2), [Business Day]);

Hope this helps

Sarvesh Pandey 71 Reputation points

2022-12-05T06:22:34.527+00:00

ohh, can you please explain what was the issue?
Sreeju Nair 12,666 Reputation points

2022-12-05T08:04:58.393+00:00
@Sarvesh Pandey

The reason is below.

See your query where you are trying to extract the date from the column "Business Day" (I just copied your query to a select query to show you what the query returns)

select convert(varchar(2), 'Business Day') from businessdays

See the output below.

Now see the query where I replaced 'Business Day' with the column name.

So in SQL query, anything inside single quotes represents a string; to represent columns you need to use column names without quotes or use [] in case you have whitespace in column names.

Hope this is clear.

Answer 2

NikoXu-msft 1,916

Hi @Sarvesh Pandey ，

Change it to this:

select * from BusinessDays where Convert(varchar(2),Datepart(day,getdate())) = convert(varchar(2),[Business Day]);

Best regards,
Niko

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NikoXu-msft 1,916 Reputation points

2022-12-05T07:50:46.627+00:00
Hi @Sarvesh Pandey ,

CONVERT Syntax:

CONVERT ( data_type [ ( length ) ] , expression [ , style ] )

If you use 'Business Day', it means that you will operate on the contents of the '
The result of the operation is as follows:

It is obviously not what you want, and using [Business Day] means you will operate on this column, like this.

Best regards,
Niko

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SQL Comparison between dates

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