结合MySql中多个表的结果

Question

I have two tables. One contains members and the other members dogs .

The dogs table contains a membership number which is what links it to the `members' table.

The members table contains all of the address information.

Every week, I have to select new paid registrations and send out cards. So I need to combine details from the dog table with information from member and have it all on one row. Then I can export it and send it to our card printer.

What is the best way to do this? I have been playing with JOINS and just can't quite get it to work.

Answer 1

Exporting to the printer I leave to you, but the JOIN is rudimentary. Replace membership_number with the correct column name.

SELECT
  members.*,
  dogs.*
FROM
  members
  JOIN dogs ON members.membership_number = dogs.membership_number

The above is brief, but in practice it is usually better to explicitly name all columns in the SELECT list, especially when you have the same named column in both tables of the join.

SELECT
  members.membership_number,
  members.address,
  members.state,
  members.someothercolumn,
  dogs.name,
  dogs.breed,
  dogs.someotherdogcolumn
FROM
  members
  JOIN dogs ON members.membership_number = dogs.membership_number

The MySQL JOIN syntax reference has many examples which can guide you in future queries.