Overview: Consistent SQL practice across varied platforms builds real job-ready confidence.Guided lessons help beginners, while timed challenges sharpen intervi ...

select user_id,cast(timestamp as date) as date_dd, max(case when action = 'page_load' then timestamp end) as login_time, max(case when action = 'page_exit' then ...

105_Marketing Campaign Success_Advanced (stratascratch).sql 106_Find the total number of downloads for paying and non-paying users by date (stratascratch).sql 107_number of shipments per month ...

SQL, or Structured Query Language, is like the language of databases. It’s a way for computers to understand and manage data. Whether one is aiming to be a data analyst, scientist, or engineer, SQL is ...

Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...

Microsoft's relational database engine has had the same licensing model since 2012. The new version released this week brings significant changes that brings SQL Server closer to Azure SQL's licensing ...

Your browser does not support the audio element. Hi, it’s Nate here with a new video on 5 coding concepts that companies will test you on in data science interviews ...

Director of Content @ISNation & HackerNoon's Editorial Ambassador by day, VR Gamer and Anime Binger by night. Director of Content @ISNation & HackerNoon's Editorial Ambassador by day, VR Gamer and ...