دانلود کتاب SQL به طور خلاصه – مرجع سریع دسکتاپ

Since its first incarnation in the 1970s, the Structured Query Language (SQL) has evolved hand-in-hand with the information boom. As a result, it is the most widely used language to administer and query relational databases. Many software companies and developers, including those in the open source and NoSQL movements, have developed their own SQL dialects in response to specific needs. All the while, standards bodies have codified a growing list of features.