Explain the basic structure of a PL/SQL block.

A PL/SQL block is a fundamental unit of code in the PL/SQL programming language. It consists of a set of SQL and PL/SQL statements enclosed within the keywords BEGIN and END. The basic structure of a PL/SQL block can be described in detail as follows: 1. Declaration Section: * The declaration section is optional but commonly used to define variables, constants, cursors, types, and exceptions used within the block. * Declarations help establish the data types and characteristics of the variables and objects used in the block. * It starts with the keyword DECLARE and ends with the keyword BEGIN. 2. Execution Section: * The execution section contains the executable statements that perform the desired actions within the block. * It starts w....