SQLite: "IN" comparison question

I wish to execute the following query on my application's SQliteDatabase.

String sql = "Select col_1,row_id from Table1 where row_id IN(Select
row_id from Table2 where key = 'key')";

I am using the rawQu开发者_运维知识库ery function of the SQLiteDataBase class for the same. The problem is when the inner query returns 0 objects the query runs and returns 0 results. But when the inner query returns a Set, the query is not executed.

Can we have nested queries like these in rawQuery? What is it that I am missing here?

Please help.

Thanks.

Why don't you use a join?

SELECT Table1.col_1, Table1.row_id FROM Table1 JOIN Table2 ON Table1.row_id = Table2.row_id WHERE key = 'key';