What are features of pl/sql Architecture


PL/SQL stands for Procedural Language Extensions to Structured Query Language. likeasically, SQL is used to perform basic operations of creating a database, storing data in the database, updating data in the database, retrieving the stored data of database, etc, whereas PL/SQL is a fully Structured Procedural language which enables the developer to combine the powers of SQL with its procedural statements.

Features of PL/SQL

The following are some useful features of PL/SQL:

 

  1. Portable:

Applications written in PL/SQL are portable, meaning they can run on any operating system where Oracle is installed.

  1. Efficient:

Without using an Oracle engine, PL/SQL is capable of effectively doing any kind of calculation. The effectiveness of transactions is enhanced.

  1. Error-checking:

When an error occurs, PL/SQL enables error-checking and shows clear notifications.

  1. Tool for development:

Along with the capabilities of variable declaration, conditional statements, looping and branching, procedures, functions, and triggers, PL/SQL provides the execution of SQL statements.

  1. Processing Exceptions:

  • The ability of PL/SQL code to handle exceptions that may impact a program's flow contributes to the code's increased reliability.

With the PL/SQL language's aforementioned advantages, the usefulness of PL/SQL programming is demonstrated in actual database-related tasks. because it can perform a variety of logical operations on the database that cannot be carried out with straightforward SQL queries.

  • For example, Take into account that we have a database for our school's management system, and we want to see a list of students who have applied for admission during the past five years, together with the payments they have made.

  •  Additionally, we wish to provide the total pay paid to both teaching and non-teaching staff. We cannot retrieve these records by just running SQL queries; numerous SQL queries may be necessary in order to collect the data.

  • However, PL/SQL allows us to build procedures or methods that may be used in a program to execute complicated logic on a database. 

  • Another benefit is that it shows user-friendly alerts and even allows exception handling, making it simple to spot issues.

PL/SQL Architecture

PL/SQL architecture consists of the following three components, below:

  • The ability of PL/SQL code to handle exceptions that may have an impact on a program's flow makes the code more dependable.

  • With the PL/SQL language's aforementioned advantages, the usefulness of PL/SQL programming is demonstrated in actual database-related tasks.

  •  Because it can perform a variety of logical operations on the database that cannot be carried out with straightforward SQL queries.

  • Consider the situation where we wish to view the list of students who applied for admission to the school in the last five years and the fees they paid. 

  • We have a database for the school's administration system. Additionally, we wish to provide the total pay paid to both teaching and non-teaching staff. We are unable to retrieve these records using only SQL queries.

  •  It would take several SQL queries, but we might be able to collect the data.

  • To execute complicated logic on a database, we can build procedures or methods in PL/SQL scripts if we choose to do so. Another benefit is that it shows user-friendly warnings and even enables exceptions, making it easy to spot issues.

Conclusion

Comparatively speaking, it is much better than DBMS JOB. Both PL/SQL code units (stored procedures and anonymous blocks) and operating system executables can be scheduled for execution using the Scheduler. 

It enables you to specify a calendar indicating the intended execution times using a notation that is eerily similar to English. The DBMS SCHEDULER built-in package contains APIs for all Scheduler-related tasks.

 Additionally, Oracle Database 10g's Enterprise Manager has a graphical user interface for managing job scheduling, making it incredibly simple for anyone using the tool for the first time.
Location: Chennai, Tamil Nadu, India

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