Oracle Basics
Welcome to your first step into the world of Oracle SQL. This is where i like to introduce you to Oracle topics in the simplest way possible. In my experience, this is the perfect path to start learning Oracle SQL.
In this Page, I will walk you through everything you need to know about Oracle Basics, Whether you are brand new to databases or brushing up after a break, this guide is designed to build your confidence and help you to understand how Oacle works, one topic at a time.
Welcome to the Oracle SQL Basics Section
👋
Querying Data
–> SELECT –
–> FROM
–> Alias
- What is Oracle SQL?
- How Databases work (High-Level)?
- SELECT Statement – Your First Query
- Understanding the FROM Clause
- WHERE Clause – Filtering Data
- ORDER BY – Sorting Results
- GROUP BY – Grouping Data for Reports
- JOINS – Combining Multiple Tables
- FUNCTIONS – Making your Results Smarter
- Writing Clean SQL – Tips For Beginners
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Master Oracle SQL & PL/SQL with Real Examples
Confused by official docs? Learn Oracle the simple, practical way – one step at a time. Designed for real beginners who want job-ready SQL and PL/SQL skills.
📘 Your Oracle Learning Path
- 🔹 Step 1: Fetching Data → SELECT, WHERE, ORDER BY
- 🔸 Step 2: Summarizing Data → GROUP BY, HAVING, COUNT, SUM
- 🟣 Step 3: Smart Filters → IN, BETWEEN, LIKE, NULL
- 🟢 Step 4: Multi-table Joins → INNER, LEFT, RIGHT, FULL JOINS
- 🟠 Step 5: Smarter SQL → CASE, DECODE, SUBQUERIES, ANALYTICS
- 💡 Real-World Examples → Queries you’ll actually use in ERP, reports, dashboards
🎯 Learn by Real Scenarios
- 🧾 Generate monthly employee join report → Learn Here
- 📊 Get Top N salaries per department → Example Query
- 🧠 Interview: Show difference in salaries → Try It
- 🔍 Filter customer records with LIKE or IN → Learn LIKE/IN
📎 Cheat Sheets & Infographics
We believe in visuals. Check these out to learn faster.
💾 Oracle SQL Basics
- SELECT – fetch rows
- WHERE – filter data
- GROUP BY – aggregate
- JOINS – link tables
- Functions – MAX, MIN, CASE
- More coming soon…
📐 PL/SQL Essentials
- PL/SQL Blocks
- Cursors
- Exception Handling
- Stored Procedures
- Functions in PL/SQL
- Advanced topics… soon
🧩 Can you crack this SQL?
Q: What’s the output of:
SELECT COUNT(*) FROM employees WHERE manager_id IS NULL;
→ Total employees with no manager
“Pro Tip: Use indexed columns in your WHERE clause to improve performance.”
– From Your Friendly Oracle Dev
Master Oracle SQL & PL/SQL – The Simple Way!
Want to learn Oracle SQL without confusing docs or corporate jargon? This is your learning hub – real examples, short explanations, practical tips. From beginner to confident developer.
📚 Oracle SQL – Basics
- SELECT – Learn how to fetch rows from tables.
- WHERE – Filter rows with specific conditions.
- GROUP BY – Summarize data using SUM, COUNT.
- ORDER BY – Sort results by column.
- DISTINCT – Remove duplicate rows.
- IN / BETWEEN / LIKE – Match sets, ranges, or patterns.
- Aliases – Rename columns and tables.
- Coming Soon… Pagination & FETCH / OFFSET
🛠️ Oracle SQL – Functions
- Aggregate: MAX, MIN, SUM, AVG, COUNT – Quick learning with cheat sheets.
- String Functions – UPPER, CONCAT, LENGTH explained.
- Date Functions – SYSDATE, ADD_MONTHS, TO_CHAR.
- Conversion: TO_CHAR, CAST
- CASE / DECODE – Add conditional logic into SQL.
- Coming Soon… Hierarchical & analytic functions
🧠 Learn PL/SQL Basics
- Anonymous Blocks – Structure and syntax
- Variables – How to declare and use
- IF / CASE / LOOP
- Cursors (Implicit & Explicit)
- Exception Handling
- Procedures & Functions
- Coming Soon… Packages & Advanced PL/SQL
📊 Real Queries & Reports
- Top Paid Employee per Dept
- Monthly Employee Join Count
- Salary Range Filters
- SQL Joins Explained
- SQL Interview Cheatsheet
- Coming Soon… ERP & Dashboard Queries
👋 Hey, I’m Your Friendly Oracle Consultant
I’m an Oracle ERP & PL/SQL developer based in Toronto. I’ve built real dashboards, reports, and code for businesses — but I still learn every day. I love simplifying complex concepts and sharing them with beginners like you.
📩 Want SQL tips weekly?
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Learn Oracle SQL & PL/SQL the Easy Way
Learn Oracle SQL & PL/SQL the Easy Way
No heavy manuals, no corporate fluff—just clear, real‑world examples that help you learn and apply Oracle quickly.
Learn Oracle SQL & PL/SQL the Easy Way
No heavy manuals, no corporate fluff—just clear, real‑world examples that help you learn and apply Oracle quickly.
🛣️ Your SQL Learning Path
- 1️⃣ Fetch Data – SELECT, WHERE, ORDER BY
- 2️⃣ Summarize – GROUP BY, HAVING, SUM, AVG, COUNT
- 3️⃣ Filter Smartly – IN, BETWEEN, LIKE, NULL
- 4️⃣ Combine Tables – Joins (INNER, LEFT, RIGHT)
- 5️⃣ Advanced – Subqueries, CASE, Analytic Functions
📘 Oracle SQL Topics
SELECT – Retrieving data
Pick only the columns you need, fetch only the rows you want—no extra clutter.WHERE – Filter your data
Show only rows that match conditions (e.g. active, salary > 50k).GROUP BY & Aggregates
Summarize data—count, sum, average—knowing how many or how much.🛠️ Your PL/SQL Learning Path
- 1️⃣ PL/SQL Blocks – Structure, BEGIN/END
- 2️⃣ Variables & Data Types
- 3️⃣ Control Flow – IF, LOOP, CASE
- 4️⃣ Cursors & Exceptions
- 5️⃣ Procedures & Functions
📘 PL/SQL Topics
PL/SQL Blocks
Learn structure: DECLARE, BEGIN, EXCEPTION, END.Cursors
Retrieve multiple rows safely using cursors—no surprises.⚡ Performance & Tuning
Speed up your queries by using indexes, avoiding full table scans, and optimizing joins. Learn when to use hints, bind variables, and query plans.⚡ Performance & Tuning
Speed up your queries by using indexes, avoiding full table scans, and optimizing joins. Learn when to use hints, bind variables, and query plans.Get a Free Cheat Sheet & Infographic Weekly 📧
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👋 I’m an Oracle Dev from Toronto
ERP consultant and lifelong learner—I break down Oracle SQL & PL/SQL using real stories and clean logic. I love travel, new tools, and making complex ideas simple.
“Tip: Never use SELECT * in production—always pick only the columns you need.” — From Your Friendly Oracle Mentor