Concepts help me to understand the SQL-Databases

As a beginner, everyone needs known examples to understand the language.

Since I know the excel basics and I Can relate the SQL to that. Hope most of them know excel fundamentals.

Excel : Database:(ignore schema now)

Consider Excel as a database

• Excel can store a lot of data in the form of Table(Columns and Rows)
• In the same way, SQL-Database also can store a lot of data in the form of columns and rows

Excel-Sheet: Database Tables

Excel can have multiple sheets, Consider those sheets are tables in SQL-Database

+--------------------------------+--------------------------------------+
|             Excel              |             SQL-Database             |
+--------------------------------+--------------------------------------+
| Excel can have multiple sheet  |  Database can have multiple table   |
| ------------------------------ |  ----------------------------------  |
| Each sheet has a unique name   |   Each Table has the unique name     |
| -----------------------------  | ------------------------------------ |
| Sheets columns and rows        |   Table  has the rows and columns    |
|                                |…