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 ...
Pivot tables let you parse raw spreadsheet data to display specific information in a concise, easy-to-digest format. Here’s how to use them in Google Sheets. One of the best ways to master Google ...
SQL Server 2016 and Azure SQL Database both give you tables that automatically keep track of the history of your data. Here's how to retrieve that historical data. In an earlier column, I showed how ...
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