Select random row from a sqlite table
Have a look at Selecting a Random Row from an SQLite Table SELECT * FROM table ORDER BY RANDOM() LIMIT 1;
sqlite
SQLite in Android How to update a specific row
First make a ContentValues object : ContentValues cv = new ContentValues(); cv.put(“Field1″,”Bob”); //These Fields should be your String values of actual column names cv.put(“Field2″,”19”); cv.put(“Field2″,”Male”); Then use the update method, it should work now: myDB.update(TableName, cv, “_id = ?”, new String[]{id});
How to use SQL Order By statement to sort results case insensitive?
You can also do ORDER BY TITLE COLLATE NOCASE. Edit: If you need to specify ASC or DESC, add this after NOCASE like ORDER BY TITLE COLLATE NOCASE ASC or ORDER BY TITLE COLLATE NOCASE DESC
How to delete SQLite database from Android programmatically
Once you have your Context and know the name of the database, use: context.deleteDatabase(DATABASE_NAME); When this line gets run, the database should be deleted.
Is there AUTO INCREMENT in SQLite?
You get one for free, called ROWID. This is in every SQLite table whether you ask for it or not. If you include a column of type INTEGER PRIMARY KEY, that column points at (is an alias for) the automatic ROWID column. ROWID (by whatever name you call it) is assigned a value whenever you … Read more
How to auto create database on first run?
If you have created the migrations, you could execute them in the Startup.cs as follows. public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory) { using (var serviceScope = app.ApplicationServices.GetService<IServiceScopeFactory>().CreateScope()) { var context = serviceScope.ServiceProvider.GetRequiredService<ApplicationDbContext>(); context.Database.Migrate(); } … This will create the database and the tables using your added migrations. If you’re not using Entity Framework … Read more
How can I add the sqlite3 module to Python?
You don’t need to install sqlite3 module. It is included in the standard library (since Python 2.5).
SQLite with encryption/password protection
SQLite has hooks built-in for encryption which are not used in the normal distribution, but here are a few implementations I know of: SEE – The official implementation. wxSQLite – A wxWidgets style C++ wrapper that also implements SQLite’s encryption. SQLCipher – Uses openSSL’s libcrypto to implement. SQLiteCrypt – Custom implementation, modified API. botansqlite3 – … Read more
Is an index needed for a primary key in SQLite?
It does it for you. INTEGER PRIMARY KEY columns aside, both UNIQUE and PRIMARY KEY constraints are implemented by creating an index in the database (in the same way as a “CREATE UNIQUE INDEX” statement would). Such an index is used like any other index in the database to optimize queries. As a result, there … Read more
Sqlite LIMIT / OFFSET query
The two syntax forms are a little confusing because they reverse the numbers: LIMIT <skip>, <count> Is equivalent to: LIMIT <count> OFFSET <skip> It’s compatible with the syntax from MySQL and PostgreSQL. MySQL supports both syntax forms, and its docs claim that the second syntax with OFFSET was meant to provide compatibility with PostgreSQL. PostgreSQL … Read more