The Complete Beginner to Advanced PostgreSQL Course 2024

Explore PostgreSQL data types from numeric and character types to jsonb, arrays, and geometric types; learn defining columns, casting, data validation, and indexing.

Discover how PostgreSQL uses operators and functions to perform arithmetic, comparisons, and data transformations; learn built-in and user-defined functions for querying and aggregating data.

Explore how PostgreSQL constraints enforce data integrity by applying primary key, foreign key, unique, check, and not null constraints to table columns, preventing duplicates and invalid data.

Explore how primary keys, foreign keys, unique constraints, check constraints, and not null constraints enforce data integrity in PostgreSQL tables, with practical create table examples.

Learn how PostgreSQL transactions group multiple operations into a single, atomic unit using begin, commit, and rollback, ensuring data integrity during money transfers and error handling.

Explore subqueries in PostgreSQL, including nested queries in select, from, where, and having clauses, with examples using a products table to filter by average unit price and compute aggregates.

Explore PostgreSQL recursive queries using a with recursive common table expression, including base and recursive members, termination conditions, and practical use cases like hierarchical data and traversing graphs.

Learn how acls define granular access control for database objects, granting privileges like select, insert, update, delete, and execute on tables, views, schemas, with default privileges and schema-level controls.

Learn how to list PostgreSQL users and roles using the system catalog and user views, querying role names and usernames with select statements, while passwords remain hashed and hidden.

Discover how savepoints enable nested transactions, partial rollbacks, and named savepoints to control PostgreSQL transactions, with practical examples of commit and rollback.

Master SQL query tuning by analyzing execution plans, identifying bottlenecks, and improving performance through indexing, query rewriting, and configuration adjustments such as work_mem and parallelism.

Master PL/pgSQL programming in PostgreSQL by building stored procedures, functions, and triggers that encapsulate business logic, handle transactions, and manage exceptions to ensure data integrity.

Explore control structures in plpgsql, including if, then, else, case, loop, while, and for. These constructs enable conditional execution and iteration within stored procedures, functions, and triggers.

Explore PL/pgSQL exception handling using begin, exception, and block structures and the raise statement. Handle specific errors like undefined table with when others, boosting code robustness.

Explore cursors in pl/pgSQL to iterate over a query’s result set by declaring, opening, fetching, processing, and closing each row, with an employees table example.

Explore parameters and return values in PL/pgSQL to create flexible functions. Learn about input parameters, data types, and return statements using an add numbers example.

Differentiate procedures and functions in Pgsql by purpose: functions compute and return values and are used in sql queries; procedures perform actions with side effects and not return a value.