In db_testtask.sql we have described simple author-bookstore-sell system, which consist of six tables:
1. t_book_authors
2. t_books
3. t_bookstores
4. t_bookstore_books
5. t_bookstore_sold_books
6. t_report_sold_books
Let's imagine in those tables we have huge mass of records. Please create sql queries (db dump file isn't acceptable) to complete next tasks:
1. create foreign key and primary key connections between tables, excluding table `t_report_sold_books`
2. optimize tables for next tasks
3. create triggers for table `t_bookstore_sold_books` which will update insert_date and update_date depending action
4. create books rankings view:
1. which will output:
1. queue number, field name: position
2. book's title, field name: title
3. book's author (first name, last name), field name: author
4. sold books count, field name: sold_count
2. conditions:
1. only those books which has been published 2013 or later
2. only those books which ISBN doesn't start with 97912
3. only those books which whole sale price is 768 CCY or more
5. create view which will output how much we need to pay to author:
1. which will output:
1. book's title, field name: title
2. book's author (first name, last name), field name: author
3. author's e-mail, field name: e_mail
4. overview how much we have paid to this author, field name: paid
5. overview how much we need to pay to this author, field name: to_pay
6. create stored procedure:
1. which will insert and updates sold books information:
1. base data comes from `t_report_sold_books` (NB! you can not alter or delete data, it is read only)
2. tables which should be updated: `t_bookstore_sold_books`, `t_bookstore_books`
2. returns table with inserted and updated data
7. create stored procedure:
1. which will update profit field in table `t_book_authors`. it must take account field percent_of_profit in table `t_book` on this calculation
CCY is abbreviation for currency
Folder `migrations` contains migrations with tasks.
Folder `seeds` contains a data for testing.
There is a command `make migrate` for fast start.
SQL commands:
1. select * from books_ranking_view;
2. select * from need_to_pay_view;
3. call update_author_profit();
4. call insert_sold_books();