SQL (Structured Query Language) is the standard language used to manage and manipulate data in relational databases.
It helps you retrieve, insert, update, and delete data efficiently — a core skill for working with Oracle databases.
Learn advanced SQL concepts for mastery and performance tuning, including Window Functions, ROW_NUMBER, RANK, CTEs, Advanced Joins, Pivot & Unpivot, Stored Procedures, Triggers, Transactions, Error Handling, Indexing, Query Optimization, Materialized Views, Security, and Nested Queries.
Master intermediate SQL concepts including Aggregate Functions, GROUP BY, HAVING, Subqueries, Joins, CASE statements, COALESCE, String, Date, Mathematical functions, Views, and Indexes.
Learn how to create and drop indexes in SQL to improve query performance. Covers single-column, composite, unique, clustered, and non-clustered indexes.
Learn SQL Views with CREATE, ALTER, and DROP statements. Understand how to simplify queries and secure data using views with practical examples.
Learn SQL mathematical functions like ROUND, CEIL, FLOOR, MOD, and ABS with examples. Perform numeric calculations easily in SQL queries.
Learn SQL date functions such as CURRENT_DATE, DATEADD, DATEDIFF, and EXTRACT with examples. Handle dates and time intervals effectively.
Learn SQL string functions such as CONCAT, LENGTH, SUBSTRING, and TRIM with examples. Useful for text manipulation in SQL queries.
Learn SQL COALESCE, NULLIF, and NVL functions with examples. Handle NULL values, avoid division errors, and provide default values in SQL queries.
Learn how to use the SQL CASE statement for conditional logic. Includes simple, searched CASE examples and practical use cases.
Learn SQL INTERSECT and EXCEPT operators with examples. Understand how they work, differences, and when to use INTERSECT vs EXCEPT in queries.