Скачать или смотреть BASIC OF SQL QUERY | DBMS | SQL | Part-4 | By Jaishri Gupta | GATE CS/IT | gate at Zeal | Gate 2021

SQL is incredibly powerful, and like every well-made development tool, it has a few commands which it’s vital for a good developer to know. Here is a list of SQL queries that are really important for coding & optimization. Each of the queries in our SQL tutorial is consequential to almost every system that interacts with an SQL database.

In this lecture, we will see some more examples of the nested query and will discuss some of the questions on this theory.

Then, we will learn how to write a query in theoretical language Relational Algebra (RA) and compare it with the practical language SQL.

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