PostgreSQL Cursors || Cursors Available In PostgreSQL || Part 2 Paramete...

In Part 2 of our PostgreSQL Cursors series, we focus on Parameterized Cursors, an advanced type of cursor that allows for dynamic data retrieval based on parameters passed at runtime. Parameterized cursors are incredibly useful when you need to execute the same query with different values, making your database operations more flexible and efficient.

The tutorial begins with a brief overview of what parameterized cursors are and how they differ from simple cursors. You’ll learn how to define a parameterized cursor in PostgreSQL, set the necessary parameters, and use these cursors to fetch data dynamically. The video includes detailed, step-by-step examples that illustrate how to use parameterized cursors in various scenarios, such as filtering data or performing operations on subsets of data based on different criteria.

We also cover the best practices for managing parameterized cursors, ensuring that your queries run efficiently without putting undue strain on your database resources. By the end of this video, you will have a solid understanding of how to implement and optimize parameterized cursors in your PostgreSQL environment, helping you to build more dynamic and responsive database applications.

Whether you're a database administrator, developer, or just looking to deepen your PostgreSQL knowledge, this tutorial provides the insights and techniques you need to effectively use parameterized cursors.

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call parameterized_cursor(1);

create or replace procedure parameterized_cursor(in_actor_id in integer)

language plpgsql

as $$

declare

lv_string character varying(200);

loop_rec record;

rec1 record;

cur1 cursor(p_film_id integer) for 

select title from film where film_id = p_film_id order by film_id;

begin

for loop_rec in select film_id from film_actor where actor_id = in_actor_id

LOOP

open cur1(loop_rec.film_id);

loop 

fetch cur1 into rec1;

exit when not found;

lv_string := 'Title: '||rec1.title;

raise notice '%',lv_string;

end loop;

close cur1;

end loop;

exception when others then

raise notice 'Something Went Wrong';

end;

$$

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