SQL Refresher # 1

First Sql refresher # 1

- Sql Structured Query Language
- Four fandamental operations: Insert, Update, Delete, Select
- Select with condition ( Select * from customers where id > 10 )
- Select with condition & order ( Select * from customers where id > 0 ORDER BY id DESC ( default is ASC i.e. ascending )

References :
- Get Northwind database script from here : https://github.com/dalers/mywind

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