使用表和局部变量（C＃和MS-Access，oledb）中的数据进行查询

Question

I'm trying to Select data from a table using OLEDB Libraries - Essentially I have a date range both dates in fields within a record (Access), I also have another field which is needed to select data.

I have a local variable holding date/time information, I need to output the data where that value held in the variable is in range with the two dates in a record, and the record holds another value which will be compared against a local variable. Any help, just showing basic syntax and querying would be appreciated.

I've looked for comparing and querying between date ranges and have had no luck.

cmd.CommandText = "SELECT FirstName, LastName, Email, PhoneNumber, 
                   NumberOfGuests, StartDate, NumberOfNights, Breakfast, 
                   RoomType, EmployeeName,  Comments FROM Booking WHERE 
                   StartDate <= " + dtpRoomSearch.Value + "AND + 
                   EndDate >= dtpRoomSearch.Value;

Need to output this information as a string (Excuse Bad Syntax, I don't know where I should be putting speech marks etc.)

I need to Query using both Local Variables and Values held in the fields of a table ie StartDate ( addressing field in table ) and EndDate (Addressing Field in table compared with local values. Also, how would I go about structuring the syntax?

Answer 1

You need the correct syntax and format of the string expressions for the date values:

cmd.CommandText = "SELECT FirstName, LastName, Email, PhoneNumber, 
                   NumberOfGuests, StartDate, NumberOfNights, Breakfast, 
                   RoomType, EmployeeName, Comments FROM Booking WHERE 
                   StartDate <= #" + dtpRoomSearch.ToString("yyyy'/'MM'/'dd") + "# AND 
                   EndDate >= #" + dtpRoomSearch.ToString("yyyy'/'MM'/'dd") + "#;"