SQL Server: Union vs Union All
Union and Union All are used to combine two or more result sets in SQL. A Union set operator is different from SQL Joins. Union combines two sets whereas SQL Joins combines two or more columns based on a matching row condition. This tutorial describes the differences between Union and Union All based on function and performance.
How to Clear an App’s Cache and Data on Android
An application’s cache and data store the information you enter, achieve, or save while you use the app. An application’s data is responsible for storing offline app and game data, which allows you to save games and continue where you left off at a later time. However, as time goes by, some applications may horde a large amount of data which you may no longer need. Unnecessary data may take up a considerable amount of your phone’s precious storage.
An application’s cache may save information on your application, too. The cache is responsible for the automatic login credentials to online applications such as Facebook, Twitter and Instagram. On your Android phone, you can also clear this data by deleting the application’s cache and data. This article will guide you through the whole process.

























