SQL for Beginners: Zero to Hero By Ashish Gadpayle in Hindi

Explore oracle sql terminologies such as fields, attributes, columns, and tuples, and learn common data types like number, date, character types, and blob/clob within a database schema.

Learn the data definition language (DDL) commands—create, alter, drop, and truncate—and how they auto commit to permanently save table changes. See practical examples of creating, altering, dropping, and truncating.

Master insert, update, and delete commands in Oracle SQL to modify data, insert single or multiple rows, perform conditional updates or deletes, and manage transactions with commit and rollback.

Explore data control language with grant and revoke, create and drop users, and assign permissions like connect, select, update, and create table in Oracle.

Learn transaction control language (TCL) commands—commit, rollback, and savepoint—and how they manage and permanently save or undo changes made with insert, update, and delete operations.

Explore how group by and having filter aggregated results, and why having replaces where for aggregate functions. Master the syntax using select, from, where, group by, and having.

Explore Oracle SQL integrity constraints, including not null, default, primary key, foreign key, unique, and check constraints. Understand column-level and table-level constraints and how indexes speed data access.

Learn how primary keys uniquely identify records and how foreign keys link related tables, with practical examples using person and order tables, plus composite primary keys and key constraints syntax.

Explore default constraints in SQL by defining default values for columns, applying them in create and alter table statements, and handling inserts and current date defaults.