Finance Analyst for Experienced Professionals

DCL includes commands such as GRANT and REVOKE which mainly deal with the rights, permissions, and other controls of the database system.

Providing the users the access or privileges to the database objects, and Taking back or canceling the privileges or permissions previously allowed or denied to the users.

SQL has many built-in functions for performing calculations on data. SQL Aggregate Functions, SQL String Functions, SQL Date Functions, and SQL Scalar functions.

A Query is used to traverse over some data that may be of small or large quantity to find the needed information.

A Subquery is a type of query which is written inside another query. A subquery becomes a part of a larger query. A subquery is also called INNER QUERY OR NESTED QUERY.

Clauses in SQL are similar to conditionals in high-level languages. We have a large variety in the SQL clauses like the Where clause, Union Clase, Order By clause, etc.

The SQL Joins clause is used to combine records from two or more tables in a database. A JOIN is a means for combining fields from two tables by using values common to each.

Views in SQL are kind of virtual tables. A view also has rows and columns as they are in a real table in the database. We can create a view by selecting fields from one or more tables present in the database.

An index is a schema object. It is used by the server to speed up the retrieval of rows by using a pointer. It can reduce disk I/O(input/output) by using a rapid path access method to locate data quickly.

Transactions are units or sequences of work accomplished in a logical order, whether in a manual fashion by a user or automatically by some sort of database program.

SQL injection, also known as SQLI, is a common attack vector that uses malicious SQL code for backend database manipulation to access information that was not intended to be displayed. This information may include any number of items, including sensitive company data, user lists, or private customer details.