Databases
StackOverflow2013
Postsdbo
POHow do I set up a mySQL table structure for a business directory with many to many relationship?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow do I set up a mySQL table structure for a business directory with many to many relationship?
    primarykey
    data
    text
    <p>I am trying to plan my table structure for a business directory where I will have multiple parent categories for multiple sub-categories and multiple business listings, all of which will require a many to many relationship.</p> <p>eg.</p> <p><b>A Night Out</b></p> <p>Clubs and Societies<br /> Public Houses<br /> <b>Restaurants</b><br /> Taxis and Private Hire Vehicles<br /> Theatres and Concert Halls<br /> Wine Bars</p> <p><b>Restaurants</b></p> <p>Chinese / Oriental<br /> Bistros<br /> Fish and Chips<br /> Indian<br /> Italian<br /> Public Houses<br /> Seafood<br /> Spanish<br /></p> <p><b>Transport and Carriers</b></p> <p>Air Charter and Rental<br /> Airlines<br /> Car / Van Hire Self Drive<br /> Courier and Distribution Services<br /> Estate / Property Re-location Services<br /> Freight Services and Agents<br /> Haulage Contractors<br /> Post Offices and Services<br /> Re-location Services<br /> Taxis and Private Hire Vehicles<br /> Van Hire</p> <p>As you can see, <b>Restaurants</b> is both a main category and a subcategory. Taxis and Private Hire Vehicles belongs to both <b>Transport and Carriers</b> and <b>A Night Out</b> and under all of these categories, on the lowest level, I will have the business listings. I will not be allowing businesses to submit their own listings but rather adding them myself upon request. A business listing can belong to a maximum of 6 categories.</p> <p>I am struggling to find the best structure of tables for my database and would be very grateful for any suggestions. I am relatively new to php/mySQL.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USRichard Bell
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload