从表中删除行

删除表中的所有行

//get writable database
SQLiteDatabase db = openHelper.getWritableDatabase();

db.delete(TABLE_NAME, null, null);
db.close();

从表中删除所有行，并在返回值中获取已删除行的计数

//get writable database
SQLiteDatabase db = openHelper.getWritableDatabase();

int numRowsDeleted = db.delete(TABLE_NAME, String.valueOf(1), null);
db.close();

用 WHERE 条件删除行

//get writable database
SQLiteDatabase db = openHelper.getWritableDatabase();

String whereClause = KEY_NAME + " = ?";
String[] whereArgs = new String[]{String.valueOf(KEY_VALUE)};

//for multiple condition, join them with AND
//String whereClause = KEY_NAME1 + " = ? AND " + KEY_NAME2 + " = ?";
//String[] whereArgs = new String[]{String.valueOf(KEY_VALUE1), String.valueOf(KEY_VALUE2)};

int numRowsDeleted = db.delete(TABLE_NAME, whereClause, whereArgs);
db.close();