# Eliminating some questions from the unanswered queue by upvoting using data query

I am using this data query provided by user75064,ˈjuː.zɚ79365, 40 votes and Lord Farin to upvote some answers with no upvotes but actually address some/all concerns of OP.

The data query is looking for question marked as unanswered, with no upvoted answer, under a specific tag, for e.g. .

While I was doing this earlier this evening, I found that actually some of the questions obtained through this query actually had an upvoted answer. For example:

Proving an identity regarding the Cauchy problem (using convolutions)

sobolev spaces - product of two functions

Writing a 2nd order PDE as a system of equations

partial differential equation $y^2\frac{\partial ^2 u}{\partial x\partial y} + \frac{\partial ^2 u}{\partial y^2}$

canonical form for hyperbolic PDE $y^2u_{xx}+2xyu_{xy}+u_{yy}=0$?

Find all solutions of the 1-D heat equation of a specific form

Then I was going to edit the query, and found there is nothing wrong with the predicate:

p.AcceptedAnswerID IS NULL AND
p.ClosedDate IS NULL AND
p.Score >= 0 AND
a.Score = 0 AND
a.Score >= ALL


Is this a bug of the SE data explorer?

Possible solutions: (a) pick a different tag; (b) pick a different time interval of the query results; (c) use a search such as is:answer score:0 [pde] (which is real-time, but will also find zero-score answers to questions that have other, upvoted, answers.).