Let’s Learn more about SQL

Section 1: Select Statement

SELECT Statement – Demonstrate how to retrieve data from a single table using the basic form of the SELECT statement.

Read More: SQL Tutorial: Guide For Data Manipulation!


Here’s a basic syntax:

SELECT column1, column2, …FROM table_name; 

1. Retrieve all columns from a table:

2. Retrieve specific columns from a table:

3. Retrieve data with a condition:

Section 2: Filtering Data

1. WHERE Clause: Focuses on filtering data based on specified conditions.

2. DISTINCT: Demonstrates how to eliminate duplicate entries from query results.

3. Comparison Operators: Covers the use of operators such as ‘>’, ‘<‘, ‘=’, ‘!=’ to form conditions in the WHERE clause.

4. LIMIT: Teaches how to restrict the number of rows a query returns using the LIMIT and OFFSET clauses.

5. FETCH: Guides on “How To Skip” a set number of rows before returning rows in a result set.

6. Logical Operators: Introduces “Logical Operators” and explains their use in assessing the truth of conditions.

7. AND Operator: Teaches “How To Combine” multiple Boolean expressions with the AND operator.

8. OR Operator: Demonstrates the combination of multiple Boolean expressions with the “OR Operator.”

9. BETWEEN Operator: Guides on selecting data within a specified range using BETWEEN.

10. IN Operator: Shows how to check if a value exists within a list with the IN operator.

11. LIKE Operator: Explains querying data based on specific patterns.

12. IS NULL Operator: Introduces the concept of NULL and how to check for NULL values.

13. NOT Operator: Demonstrates inverting a Boolean expression with the NOT operator.

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