What is dependency injection
Dependency injection is today one of the most misunderstood concept in modern web development. Learn it the hard way.
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Servlet to Spring: Adding in memory database
In this part of “Build a shopping cart hard way”, we will learn how to use persistence and JDBC.
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What is primary key in SQL
Primary key is often misunderstood concept by most of the developer, when you say primary key, do you mean natural key or synthetic key?
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What is a database?
Have you ever tried building your own database? If you did, how hard do you think it would be?
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