Summary 📝

Introductory Summary (Paragraph Format)

SQL (Structured Query Language) is used to manage data in a relational database. It allows users to insert new data, update existing data, and delete data that is no longer needed. 

The INSERT command is used to add a new record into a table. 

The UPDATE command changes the values of existing data, often based on a condition. 

The DELETE command removes data from a table, also using conditions to control which rows are affected. These commands allow a database to stay up to date and accurate. 

It is important to use conditions such as WHERE carefully to avoid changing or deleting the wrong data. Each of these commands is written in a standard format that makes the code easy to read and understand. Learning how to use them properly is essential for working with any kind of data system.

Key Learning Points 📌

• SQL is a language used to work with data in a database.

• INSERT INTO adds new rows of data to a table.

• UPDATE changes the values in one or more fields in existing rows.

• DELETE removes rows of data from a table.

• The WHERE clause helps target specific rows for updating or deleting.

• Always use WHERE to avoid accidentally changing or removing all data.

• SQL commands are written in a structured way using keywords and values.

• Changes made with SQL affect the stored data directly in the database.

• These commands are used to keep data up to date and accurate.