de_notes

📚 LOGICAL OPERATORS

Logical operators are used in SQL to combine multiple conditions in a WHERE clause.
They control how multiple conditions are evaluated together.

🛠️ Basic Syntax

SELECT column1, column2, ...
FROM table_name
WHERE condition1 [AND/OR/NOT] condition2;

SELECT specifies the columns you want.
FROM specifies the table.
WHERE filters rows based on one or more conditions.

Example

SELECT * FROM users WHERE age > 18 AND city = 'New York';

This query selects all users where the age is greater than 18 and the city is New York.

Key Points

AND requires both conditions to be true.
OR requires either condition to be true.
NOT negates a condition.
Use parentheses () to group conditions when needed for clarity.

Additional Example

SELECT * FROM products
WHERE price > 100 OR stock < 50;

This query selects products where the price is greater than 100 or the stock is less than 50.

🎥 Video Notes

📝 Problem Description

Describe the problem, challenge, or topic discussed in a video related to SELECT FROM.
What concept was explained or what exercise was solved?

DataBase Given

🧠 Solution Code / Explanation

-- Write your SQL code attempt or solution related to SQL COMMAND
SQL COMMAND

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