Question

Dear Stack Overflow Community,

I have a question regarding how to incorporate a WHERE clause when querying a sql database in Android. My goal is to return specific records from my database where the date picked by a datepicker matches the date stored.

Here is my code:

private static String datePickerDate = "3/29/2011";
private static String[] FROM = { _ID, NAME, PRICE, DATE, TIME };
private static String ORDER_BY = TIME + " DESC ";
private static String WHERE = DATE + "is like " + datePickerDate;
private Cursor getEvents(){
    // Perform a managed Query. The Activity will handle closing
    // and re-querying the cursor when needed
    SQLiteDatabase db = events.getReadableDatabase();
    Cursor cursor = db.query(TABLE_NAME, FROM, null, null, null, null, ORDER_BY);
    startManagingCursor(cursor);
    return cursor;
}

My questions are thus:
Where does my “WHERE” statement go?

And is my “WHERE” statement correct?

The documentation I found for db.query doesn’t specify if a “WHERE” clause can be used, it just specifies that a “HAVING” clause is possible, but I don’t quite think that’s what I’m wanting.

 db.query(table, columns, selection, selectionArgs, groupBy, having, orderBy)   

Answer 1

The selection represents your WHERE clause.

From the doc

selection A filter declaring which
rows to return, formatted as an SQL
WHERE clause (excluding the WHERE
itself). Passing null will return all
rows for the given table.

So you can try this (untested):

private static String WHERE = "DATE like ?";
db.query(table, columns, WHERE , new String[] { datePickerDate }, groupBy, having, orderBy)