Difficulty: Intermediate Level 2 and AdvancedRequirements: Patience,intuition and understandingEstimated time to read the chapter: 10-20 min (reading thoroughly will help you understand better)Alright I'll make this tutorial as short as possible so that you can understand faster.Understanding Error Based/Double QueryHow does Error Base and Double Query workError Based:Code:A method of extracting information from a database when UNION SELECT function does not work at all. This can be done using a compiled query to extract the database information Double Query:Code:Basically like Error Based, except that the Error Based Query will be doubled...