Jack Wallen explains how to add data into a MySQL table from the command line.

Microsoft Excel 2010 can convert a worksheet to a data table to help you quickly analyze your related data in formatted rows and columns. When you need to expand the table layout, apply the Home ...

Learn how to add and remove Primary Keys from an Access database table. The primary key's purpose is to promptly associate data from multiple tables and combine that data.

In Microsoft Access, a Query can answer a simple question, merge data from different tables, perform calculations, add, change, and delete data from the database.

Designing an appropriate set of indexes can be one of the more troubling aspects of developing efficient relational database applications. Perhaps, the most important thing you can do to assure ...

See how to join two data sets by one or more common columns using base R’s merge function, dplyr join functions, and the speedy data.table package.

Redash can create dashboards from various data sources that display charts, pivot tables, cohorts, boxplots, counters, funnels, maps, sankeys, sunbursts and word clouds. Here’s how to use it.