Scale Fail (part 1) May 6, 2011 This article was contributed by Josh Berkus Let me tell you a secret. TechCrunch TIOBE - The Software Quality Company TIOBE Index for February 2021 February Headline: it seems like nothing really changes Some say that the IT industry is changing continuously. Successful Strategies for Commenting Code Introduction Commenting your code is like cleaning your bathroom—you never want to do it, but it really does create a more pleasant experience for you and your guests. Because I’ve recently adopted a new mantra to use comments frequently and appropriately in my code, I spent a few hours researching the literature on commenting readability, reusability, and guidelines. It was a bit overwhelming to see the sheer amount of information and discussions on the topic. Basically, there are a lot of tough, but fundamental questions out there like what does “frequently and appropriately” mean?
Insert Data From One Table to Another Table – INSERT INTO SELECT – SELECT INTO TABLE « Journey to SQLAuthority Following three questions are many time asked on this blog. How to insert data from one table to another table efficiently? How to insert data from one table using where condition to anther table? How can I stop using cursor to move data from one table to another table? There are two different ways to implement inserting data from one table to another table. I strongly suggest to use either of the method over cursor. Free Books A lot of people keep asking about a good list of programming books. Hence, we are building this list to save your time and to spread the knowledge. Some of these books will definitely help us to evolve our coding skills and thought processes for developing better solutions. We will do our best to keep updating this list, hope you find this list useful, here we go.
SQL Foreign Key A foreign key is a column (or columns) that references a column (most often the primary key) of another table. The purpose of the foreign key is to ensure referential integrity of the data. In other words, only values that are supposed to appear in the database are permitted. For example, say we have two tables, a CUSTOMER table that includes all customer data, and an ORDERS table that includes all customer orders. Business logic requires that all orders must be associated with a customer that is already in the CUSTOMER table. To enforce this logic, we place a foreign key on the ORDERS table and have it reference the primary key of the CUSTOMER table.