Oracle SQL Essentials Training in Dublin, Ireland

This course provides a comprehensive introduction to Oracle SQL, covering essential querying skills needed to work with Oracle databases. The training is ideal for beginners, data analysts, developers, and database users who want to learn how to retrieve, manipulate, and manage data efficiently using SQL in an Oracle environment.

SQL Fundamentals and Data Retrieval

• Introduction to Oracle SQL
• What is SQL?
• Oracle Database structure overview
• Basic Query Structure
• SELECT, FROM, WHERE
• Sorting results with ORDER BY
• Filtering Data
• Logical operators (AND, OR, NOT)
• Comparison and pattern matching with LIKE, IN, BETWEEN
• Built-in Functions
• Numeric, string, and date functions
• Conversion and case functions
• Hands-On Lab

Aggregation, Joins, and Subqueries

• Grouping Data
• GROUP BY and HAVING clauses
• Aggregate functions: COUNT, SUM, AVG, MIN, MAX
• Joining Tables
• INNER, LEFT, RIGHT, and FULL OUTER JOIN
• Aliases and multi-table joins
• Subqueries
• Single-row and multiple-row subqueries
• Correlated subqueries and EXISTS
• Set Operations
• UNION, INTERSECT, MINUS
• Hands-On Lab

Data Manipulation and Table Management

• Data Manipulation Language (DML)
• INSERT, UPDATE, DELETE statements
• Transaction control: COMMIT, ROLLBACK, SAVEPOINT
• Table Management and Constraints
• Creating tables with CREATE TABLE
• Defining PRIMARY KEY, FOREIGN KEY, UNIQUE, NOT NULL
• Altering and dropping tables
• Views and Indexes (Intro)
• Creating and using views
• Understanding indexes for performance
• Best Practices and Optimization Tips
• Hands-On Lab