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PL/SQL Introduction

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PL/SQL (Procedural Language/Structured Query Language) is a procedural programming language and a structured query language (SQL) that is specifically designed and developed for the Oracle Database Management System (DBMS). PL/SQL is a powerful and flexible programming language that is used to develop and execute a wide range of applications, including database applications, business applications, and web applications, that access and manipulate the data in an Oracle database.

PL/SQL is a high-level, block-structured programming language that is based on the Ada programming language, and it is designed to be easy to learn, easy to use, and easy to maintain. PL/SQL is a fully-integrated and comprehensive programming language that includes a wide range of features and capabilities, such as:

  • Variables, constants, and data types: PL/SQL supports a wide range of variables, constants, and data types, including scalar data types (such as numbers, strings, and dates), composite data types (such as records and collections), and object-oriented data types (such as objects and object types).
  • Operators and expressions: PL/SQL supports a wide range of operators and expressions, including arithmetic operators, relational operators, logical operators, assignment operators, and conditional operators.
  • Control structures: PL/SQL supports a wide range of control structures, including conditional statements (such as IF-THEN-ELSE and CASE statements), loop statements (such as FOR and WHILE loops), and exit statements (such as EXIT and GOTO statements).
  • Subprograms: PL/SQL supports a wide range of subprograms, including functions, procedures, packages, and triggers, that can be used to modularize and reuse the code in a PL/SQL application.
  • Cursors and records: PL/SQL supports cursors and records, which are used to retrieve, manipulate, and process the data rows in a database table, one row at a time.
  • Exceptions and error handling: PL/SQL supports exceptions and error handling, which are used to handle and handle errors, exceptions, and other unexpected events that might occur during the execution of a PL/SQL application.

PL/SQL is a powerful and flexible programming language that is used to develop and execute a wide range of applications, including database applications, business applications, and web applications, that access and manipulate the data in an Oracle database. PL/SQL is a high-level, block-structured programming language that is based on the Ada programming language, and it is designed to be easy to learn, easy to use, and easy to maintain. PL/SQL includes a wide range of features and capabilities, such as variables, constants, and data types, operators and expressions, control structures, subprograms, cursors and records, exceptions and error handling, and more.