The ‘refuel’ table has all refuelsĪnd a reference to corresponding expense entries (one to one). bool distinct, Query the given URL, returning a Cursor over the. When using a SQLite database only SQL queries are accepted, providing only the SQL tablename will. SQLiteDatabase.Query Method Query the given URL, returning a Cursor over the result set. created an SQLite (or MySQL) Database you will likely want to query it as well. Read SQL query or database table into a DataFrame. from peewee import SQLite database using WAL journal mode and 64MB cache. Refuels/Services/etc are all various types of expenses. SQLite Database Basics with DB Browser for SQLite INSERT INTO & UPDATE.
And the ones I like the most are the SQLiteDatabase.query, SQLiteDatabase.update, SQLiteDatabase.insert ones, because they take away quite a bit of pain for typing out SQL commands by hand.īut unfortunately, if you have to use a JOIN, then usually you have to go and use the SQLiteDatabase.rawQuery method and end up having to type your commands by hand.īut but but, if the two tables you are joining do not have any common column names (actually it is good design to have them so - by having all column names prefixed by tablename_ maybe), then you can hack the usual SQLiteDatabase.query() method to get a JOINed query.Ī bit of context - this is an app about tracking car expenses and refuels. cursor.close() db. Youve now created an SQLite database using the sqlite3 module. Cursor cursor db.rawQuery('select from person',null). If we query sqlitemaster for a non-existent table spam, res.fetchone() will return. Android has some really nice SQLite helper classes and methods. rawQuery ()sqlquery ()sql sql public Cursor rawQuery (String sql, String selectionArgs) rawQuery SQLiteDatabase db.
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