✅ Core SQL Queries You Should Know 📊💡

1️⃣ SELECT, FROM, WHERE
This is how you tell SQL what data you want, where to get it from, and how to filter it.
👉 SELECT = what columns
👉 FROM = which table
👉 WHERE = which rows
Example:
SELECT name, age FROM employees WHERE age > 30;
This shows names and ages of employees older than 30.

2️⃣ ORDER BY, LIMIT
Use when you want sorted results or only a few records.
👉 ORDER BY sorts data
👉 LIMIT reduces how many rows you get
Example:
SELECT name, salary FROM employees ORDER BY salary DESC LIMIT 3;
Shows top 3 highest paid employees.

3️⃣ DISTINCT
Removes duplicate values from a column.
Example:
SELECT DISTINCT department FROM employees;
Lists all unique departments from the employees table.

4️⃣ BETWEEN
Used for filtering within a range (numbers, dates, etc).
Example:
SELECT name FROM employees WHERE age BETWEEN 25 AND 35;
Shows names of employees aged 25 to 35.

5️⃣ IN
Use IN to match against multiple values in one go.
Example:
SELECT name FROM employees WHERE department IN ('HR', 'Sales');
Shows names of people working in HR or Sales.

6️⃣ LIKE
Used to match text patterns.
👉 % = wildcard (any text)
Example:
SELECT name FROM employees WHERE name LIKE 'A%';
Finds names starting with A.

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