Troubleshooting database outages and connection issues.What is connection pooling and how does it work?.Top 8 TypeScript ORMs, query builders, & database libraries: evaluating type safety.Top 11 Node.js ORMs, query builders & database libraries in 2022.Introduction to MongoDB Aggregation Framework.Introduction to MongoDB database tools & utilities.Working with dates and times in MongoDB.Introduction to MongoDB connection URIs.How to query and filter documents in MongoDB.How to manage databases and collections in MongoDB.How to manage authorization and privileges in MongoDB.How to manage users and authentication in MongoDB.Introduction to provisioning MongoDB Atlas.How to export database and table schemas in SQLite.How to update existing data with SQLite.How to perform basic queries with `SELECT` with SQLite.Inserting and deleting data with SQLite.Creating and deleting databases and tables with SQLite.An introduction to MySQL column and table constraints.How to create and delete databases and tables in MySQL.An introduction to PostgreSQL column and table constraints.An introduction to PostgreSQL data types.How to create and delete databases and tables in PostgreSQL.How to configure a PostgreSQL database on RDS.Comparing relational and document databases.Glossary of common database terminology.Comparing database types: how database types evolved to meet different needs.We now have a full database, and can now do any CRUD operations on it. So if the version number changes, you can delete the old database and replace it with a new copy. You may want a more robust test if you update your database and update the app, possibly using version numbers. In our code, we are checking that our database doesn't exist, and only copying if we don't already have a database. Putting a break point on the 'if' statement, and stepping through, we see that the MemoryStream has a length and capacity value, which in this case is the size of our database. We use the name of the application, and in this case, the 'Data' folder where we stored the database. Then, using Stream, we get the QuizQuestions database from the embedded resources. Next we need to extract the database from the resource.įirst of all we get the assembly, using System.Reflection and IntrospectionExensions. Using ensures that the correct folder for the platform is used on all platforms - iOS, Android and Windows. I declare a 'DBPath' variable that can be used throughout the project, as well as a SQLiteConnection. We need to extract this from the resource, and save it to a database. This ensures it will be copied to whatever device you are deploying to, as a resource. After doing this, click on the database, and in the Properties window, choose Embedded Resource for the Build Action. I did this, created a new 'Data' folder in my project, and copied my new database into the folder. One of the options is to 'Script schema and data for SQLite' which produces a script you can then execute the script from DB Browser for SQLite to create your database and populate your data. For this I used the excellent SQLite/SQL Server Compact Toolbox from ErikEJ. I needed to get the data from SQL Server into my SQLite database. NET MAUI project and added a couple of Nuget packages. NET MAUI so I have access to it on my phone when I am out and about (very sad I know!). I have a SQL Server database of 120,000 quiz questions and answers, and a Windows forms applications that allows me to generate quizzes. There are loads of articles on using a SQLite database by creating it from scratch, but what if you want to deploy an existing database? Having done this and forgotten how to do it several times with Xamarin projects, I decided to document how to deploy an existing SQLite database with your project in.
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