Download Seven Databases in Seven Weeks: A Guide to Modern Databases by Eric Redmond, Jim R. Wilson PDF
By Eric Redmond, Jim R. Wilson
Data is getting higher and extra advanced via the day, and so are the alternatives in dealing with that information. As a latest software developer you must comprehend the rising box of knowledge administration, either RDBMS and NoSQL. Seven Databases in Seven Weeks takes you on a journey of a few of the most well liked open resource databases this present day. within the culture of Bruce A. Tate's Seven Languages in Seven Weeks, this publication is going past your easy educational to discover the fundamental techniques on the middle each one technology.
Redis, Neo4J, CouchDB, MongoDB, HBase, Riak and Postgres. With each one database, you'll take on a real-world information challenge that highlights the suggestions and lines that make it shine. You'll discover the 5 info versions hired by way of those databases-relational, key/value, columnar, record and graph-and which sorts of difficulties are most suitable to each.
You'll find out how MongoDB and CouchDB are strikingly varied, and notice the Dynamo historical past on the middle of Riak. Make your purposes quicker with Redis and extra attached with Neo4J. Use MapReduce to unravel huge information difficulties. construct clusters of servers utilizing scalable providers like Amazon's Elastic Compute Cloud (EC2).
detect the CAP theorem and its implications on your disbursed facts. comprehend the tradeoffs among consistency and availability, and for those who can use them on your virtue. Use a number of databases in live performance to create a platform that's greater than the sum of its components, or locate person who meets your whole wishes at once.
Seven Databases in Seven Weeks will take you on a deep dive into all the databases, their strengths and weaknesses, and the way to decide on those that suit your needs.
What You Need:
To get the main of of this publication you'll need to stick with alongside, and that suggests you'll desire a *nix shell (Mac OSX or Linux hottest, home windows clients will desire Cygwin), and Java 6 (or higher) and Ruby 1.8.7 (or greater). each one bankruptcy will checklist the downloads required for that database.
Read or Download Seven Databases in Seven Weeks: A Guide to Modern Databases and the NoSQL Movement PDF
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Additional resources for Seven Databases in Seven Weeks: A Guide to Modern Databases and the NoSQL Movement
Cross-reference these keywords with actors’ last names, and try to find the most talked about actors. 5 Wrap-Up If you haven’t spent much time with relational databases, we highly recommend digging deeper into PostgreSQL, or another relational database, before deciding to scrap it for a newer variety. Relational databases have been the focus of intense academic research and industrial improvements for more than forty years, and PostgreSQL is one of the top open source relational databases to benefit from these advancements.
The crosstab() function needs another set of values to represent months. This is how the function knows how many columns we need. These are the values that become the columns (the table to pivot against). So, let’s create a table to store a temporary list of numbers. CREATE TEMPORARY TABLE month_count(month INT); INSERT INTO month_count VALUES (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11),(12); Now we’re ready to call crosstab() with our two queries. SELECT * FROM crosstab( 'SELECT extract(year from starts) as year, extract(month from starts) as month, count(*) FROM events GROUP BY year, month', 'SELECT * FROM month_count' ); ERROR: a column definition list is required for functions returning "record" Oops.
We will expound on these root concepts tomorrow. Day 1 Homework Find 1. Bookmark the online PostgreSQL FAQ and documents. 2. Acquaint yourself with the command-line \? and \h output. 3. In the addresses FOREIGN KEY, find in the docs what MATCH FULL means. Do 1. Select all the tables we created (and only those) from pg_class. 2. Write a query that finds the country name of the LARP Club event. 3. Alter the venues table to contain a boolean column called active, with the default value of TRUE. 3 Day 2: Advanced Queries, Code, and Rules Yesterday we saw how to define schemas, populate them with data, update and delete rows, and perform basic reads.