add yesterday date parameter

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Dear all,

I would like to know, how can i can get the following sql server query below, to be read in c#:

select * from [dbo].[database] where UploadDate >= Convert(nvarchar(10), getdate() - 1, 101)

I have started by of creating the following code but I am not sure, if this may be the right approach. Any help would be much appreciated.

C#

var yesterday = DateTime.Today.AddDays(-1);
        string cmdstr = "select * from [dbo].[database] where UploadDate = 'yesterday' ";

Posted 28-Feb-14 0:07am

miss786

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3 solutions

Solution 1

The way I do it is:

SQL

SELECT * FROM MyTable WHERE DATEDIFF(d, UploadDate, GETDATE()) = 1

Posted 28-Feb-14 0:10am

OriginalGriff

Comments

miss786 28-Feb-14 6:31am

hi, Thank you for your suggestion. I am still a little unclear, how do i go about writing sql query in c#, to be able to retriever yesterday's date's data. Its currently throwing -- Conversion failed when converting date and/or time from character string.-- error for the above code in my original post. Many thanks for your time.

OriginalGriff 28-Feb-14 7:09am

This may sound like a stupid question, but what did you declare UploadDate as in your database?

miss786 28-Feb-14 7:31am

Hi, Thank you reply. 'UploadDate is declared as 'datetime' type in the database. I manage to get it work, not sure if its the right approach, but its currently working. Thank you for your time and support. Many thanks.

Solution 3

Did DateAdd[^] function for MS Access stop wroking? No!

SQL

SELECT DateAdd("d", -1, Date()) As Yesterday;

Posted 28-Feb-14 1:50am

Maciej Los

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miss786 · Accepted Answer · 2014-02-28T01:31:00

Solution 2

Working solution code:

C#

var yesterday = DateTime.Today.AddDays(-1);
string cmdstr = "select * from [dbo].[database] where UploadDate = @value";
SqlCommand cmd = new SqlCommand(cmdstr, conn);
cmd.Parameters.AddWithValue("@value", yesterday);

Posted 28-Feb-14 1:31am

miss786