Question

I have a strange problem…I have a MySql db with some columns and one of the column is date_purchased which is of type date_time.

I am using C# and made a DatetimePicker and user selects a date.

private void dateTimePicker1_ValueChanged(object sender, EventArgs e)
    {

        varDate = dateTimePicker1.Value;

    }

Now the problem is I have to compare the two datetimes (one from the database and one from the User) and I should display the records that are less than the date selected by the user(varDate).

select * from orders where date_purchased < = '" + varDate + "'";

I am executing this query but i am getting an exception

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '= '12/25/2011 8:01:31 PM'' at line 1

I wrote the connection string and all and I am struck at the query.
Any Help will be much appreciated…
Thanks,
Subash

Answer 1

You have not given any details on what you are using to run the select query; however, if you are using the connector provided by Mysql (Connector/Net) then you should be using parameters. Which would look something like this:

String sql = "select * from orders where date_purchased < @DatePurchased";

MySqlDataAdapter adapter = new MySqlDataAdapter(sql, connection);
adapter.SelectCommand.Parameters.Add("DatePurchased", MySqlType.DateTime).Value = varDate; 
adapter.Fill(dataSet);   

Using parameters will ensure the values are converted and will also prevent SQL Injections