After a couple of month dealing with MySQL and wondering how is possible to rely on such fragile system, I’m back to PostgreSQL. I had the fantastic news my PostgreSQL and big data talk was accepted at the Italian Linux Day 2014 organised by the Ferrara Linux User Group. The talk will be obviously in Italian and will be very likely available in streaming. The talk schedule is very interesting indeed and covers the entire day.

The book is now complete. There’s still a lot to do for reviewing the writing and fixing the bad grammar. Anyway is about 107 pages and I’m pretty satisfied. I’ve worked on this document for 4 months in my spare time and I became more confident with my English during the writing. So, what’s next? I’ll spend the next couple of weeks reviewing and fixing the book. After that I’ll put the pdf on lulu.

This is almost the entire chapter 11. I’m still writing the final section, I’d like to put into a separate post though. I’ve also almost finished the restore’s performance. After this the book is complete. I will start a review to make it a decent writing before publishing onto lulu.com and amazon kindle. I’m not sure amazon permits to sell books for free I’ll find a solution anyway. A couple of things to know before start coding… This chapter is completely different from the rest of the book.

Foreign keys A foreign key is a constraint enforced using the values another table’s field. The classical example is the tables storing the addresses and cities. We can store the addresses with the city field, inline. Being the city a duplicated value over many addresses, this will cause the table bloat by storing long strings, duplicated many and many times, alongside with the the address. Defining a table with the cities and referencing the city id in the addresses table will result in a smaller row size.

I’ve started the sixth chapter, the one on the data integrity I’ve forgotten. There are the first two parts alongside with the introduction. I’ve also updated the book on slideshare with the new cover and the last incomplete chapter for the developers. The beautiful cover is made by Chiaretta & Bon. Kudos and many thanks. I’ve also uploaded the latex sources on github for anybody to fork and review my crappy english.