Question

I am making a site for booking trucks online. I am using MySql for database. I have a Table called “Available_Bookings”, each row of which stores a truck, its driver name , driver contact number etc. The truck has some fixed dates on which it can operate. These dates can be 1,2 or any in number. Given a truck I need to know the dates on which it operates.

Any suggestions.. how to design my db?

Thanks

Answer 1

Create a table which has two columns, one for storing the truck_id and date_operational. For each date that a particular truck is operational, insert one entry into this table.

Eg.

truck_id  |  date_operational  
----------------------------  
     1    |  12-07-2012  
     1    |  17-07-2012  
     2    |  13-07-2012
     3    |  12-07-2012  
     3    |  17-07-2012  

Update –

Given a truck I need to know the dates on which it operates.

For this you may use the simple query –

SELECT date_operational FROM <tablename> WHERE truck_id = <desired_truck>;