Book (Practical) Computer Anyone can imagine how to manipulate this data to overcome the difficulties of SQL. Database

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

Computer
computer
Many IT engineers can write Software Design plus / programs, but don't understand SQL well. Development is possible with libraries for DB access called O/R mappers, and some projects prohibit the writing of complex SQL statements for various reasons. However, if you develop applications without understanding SQL or databases, you will have to struggle later with problems such as "poor performance" and "poor maintainability" even if you can write applications. This book is intended for IT engineers who have learned the grammar of SQL but are not comfortable with SQL. To be able to read and write complex SQL, you need to understand the concept of manipulating database tables in a coherent manner (set orientation). To solve problems such as performance, maintainability, and development efficiency, you need to understand how applications and databases work and share roles appropriately. This book explains these concepts through 20 episodes.