Some basic additional MS-SQL queries in addition to my previous repository to help beginners understand the concepts. Here we are using a sample backup database called WideworldimportersDW which is readily available.The link to download the same is given below. Download link for WideworldimportersDW backup file -https://github.com/Microsoft/sql-server-samples/releases/tag/wide-world-importers-v1.0 This database can be downloaded and replaced in your Sql server management studio easily to perform the further sql queries mentioned in this repository. The lesson contains close to 30 sql commands which mainly includes select,update,insert,delete command to strengthen your knowledge about sql query writing.