Αποτελέσματα Αναζήτησης
private final String MY_QUERY = "SELECT * FROM table_a a INNER JOIN table_b b ON a.id=b.other_id WHERE b.property_id=?"; db.rawQuery(MY_QUERY, new String[]{String.valueOf(propertyId)}); Use ? bindings instead of putting values into raw sql query.
3 Αυγ 2022 · Opening and Closing Android SQLite Database Connection. Before performing any database operations like insert, update, delete records in a table, first open the database connection by calling getWritableDatabase () method as shown below: public DBManager open() throws SQLException {.
3 Ιαν 2024 · To read from a database, use the query() method, passing it your selection criteria and desired columns. The method combines elements of insert() and update(), except the column list defines the data you want to fetch (the "projection"), rather than the data to insert.
An UPDATE statement starts with the UPDATE keyword, followed by the table name, followed by a SET clause. A SET clause consists of the SET keyword, followed by the name of the column you want to update.
Which, in android, can be done like this - String rawQuery = "SELECT * FROM " + RefuelTable.TABLE_NAME + " INNER JOIN " + ExpenseTable.TABLE_NAME + " ON " + RefuelTable.EXP_ID + " = " + ExpenseTable.ID + " WHERE " + RefuelTable.ID + " = " + id; Cursor c = db.rawQuery( rawQuery, null );
17 Σεπ 2015 · In this post, you will learn about SQLiteOpenHelper class, how to create a database, how to create tables, how to write queries, how to perform Create, Read, Update and Delete (CRUD) operations...
30 Αυγ 2016 · Doing a table join in Android without using rawQuery. The Open Event Android App, downloads data from the API (about events, sessions speakers etc), and saves them locally in an SQLite database, so that the app can work even without internet connection.
