![]() Luckily for us, knowing SQL opens a vast array of opportunities for practicing analysis on interesting datasets.įor example, if you even occasionally browse the web on your personal computer, then you are in complete ownership of a unique and very personal dataset, the records of which are entirely of your own making: the history of websites you've visited, which conveniently for us, every major browser today stores in an easy to access SQLite database. SQL expertise can only do so much.ĭata analysis and SQL should feel difficult and foreign when you are working with difficult and foreign data. You haven't had the time to build a beat, and then to get the tips and scoops from the officials and folks who know where the stories are. If you're new to journalism, you don't have this advantage. They already know what they'll find in the data before writing an actual query. The ones who do it well are intimately knowledgeable about what's in the data, what's missing, and everything in the world that that data touches. So how do journalists extract insights and powerful stories from even the most benign datasets. But this depth of data required the state legislature to care about the problem of racial profiling, and then to pass a law and allocate resources to properly collect the data. In contrast, every law agency in Connecticut publishes detailed data about every traffic stop, including the age, gender, race, and ethnicity of the driver, the reason the stop was initiated, whether the vehicle was searched, and what, if anything, was found. the age, race, and gender of the subject, while being vague about the reason for the stop and what happened during the stop: While Menlo Park publishes police stop data, it's almost entirely lacking information about who was stopped – e.g. Before the data is made publicly available, agencies can be overzealous in scrubbing it of the details that are not only interesting, but provide vital context needed to accurately analyze the data. That said, it's not easy to learn SQL with public data. We study public data because its free, its creation is a result of our tax dollars, and its contents and insights influence our laws and policies. Find me in the Fediverse.Whoever first thought "If you didn't do anything wrong, what do you have to hide?" obviously didn't know SQL. This book is licensed under the Creative Commons Attribution-ShareAlike 4.0 International license.Ĭopyright © 2023 CommonsWare - All Rights Reserved. If your app’s data has -shm and/or -wal files, and you used “Close Database” to get a clean single-file copy of your database, in addition to copying that database to your device, you will need to remove the device’s -shm and -wal files to match.Be sure to terminate your app’s process before you do this, so you do not replace SQLite files behind Room’s back.If you wish, you could then copy the database back to the device, using Device File Explorer. When you are done, if you click the “Close Database” button, the SQLite database will be closed cleanly, leaving you with just the database file and without any -shm or -wal file. Note, though, that if you modify the data and wish to persist those changes, you need to click the “Write Changes” toolbar button. For queries or other statements that return results, you get a table showing those results: The “Execute SQL” tab lets you enter in your own queries or other operations (e.g., INSERT statements) and run them against your database. The “Browse Data” tab gives you a tabular view of the contents of a selected table, chosen via the drop-down in the tab’s own toolbar:ĭB Browser for SQLite, Showing Table Contents Like Database Inspector, DB Browser for SQLite gives you a tree of the various tables in the “Database Structure” tab, where you can see the schema for a table:ĭB Browser for SQLite, Showing Table Schema You can then open it in DB Browser for SQLite using the “Open Database” toolbar button, selecting the database file itself (not the -shm or -wal files, if any). You will need to copy all of these files to your development machine, most likely using Device File Explorer from Android Studio. Particularly if the app opened the database and did not explicitly close it, you will also see two additional files, with the same name as the database plus -shm and -wal extensions. In there, you will find a database file, with the name that you gave it in your RoomDatabase (e.g., stuff.db).
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