I am trying this QUERY, and return this weird error. What does it mean?
Here is my query:
SELECT * FROM newRowP a WHERE a.rowId IN (SELECT * FROM newCellP b WHERE b.cellId IN (SELECT * FROM newproviderP c WHERE c.pId IN ('3000344','245')))
Your subqueries, which
SELECT *, are returning more than one column; whereas
IN () requires exactly one column to be returned.