user20721: Sometimes chess tempo works.  Sometimes it does not.  Seems random. Is there another database that is completely reliable that is as big as chess tempo?
I am looking for a DB that gives the moves with winning percentage or else percent results for  WDL for each move. 

user19877: This fits the bill perfectly, and ChessBase is incredibly reliable:
https://database.chessbase.com/
You will have to create a free account, and there are features that are premium, but for winning percentages, it has that for free. I am logged into this with a free account and you can see the percentages in the screenshot.

Here is what it looks like with my paid account (just the right portion of the screen changed, so I only took a screenshot of that).

Chessgames.com also has what you are looking for in terms of percentages here, but with much fewer games: https://www.chessgames.com/perl/explorer

20721: <p>Sometimes chess tempo works.  Sometimes it does not.  Seems random. Is there another database that is completely reliable that is as big as chess tempo?</p>

<p>I am looking for a DB that gives the moves with winning percentage or else percent results for  WDL for each move. </p>
 19877: <p>This fits the bill perfectly, and ChessBase is incredibly reliable:</p>

<p><a href="https://database.chessbase.com/" rel="nofollow noreferrer">https://database.chessbase.com/</a></p>

<p>You will have to create a free account, and there are features that are premium, but for winning percentages, it has that for free. I am logged into this with a free account and you can see the percentages in the screenshot.</p>

<p><a href="https://i.stack.imgur.com/v7HBe.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/v7HBe.jpg" alt="enter image description here"></a></p>

<p>Here is what it looks like with my paid account (just the right portion of the screen changed, so I only took a screenshot of that).</p>

<p><a href="https://i.stack.imgur.com/Wo76X.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Wo76X.png" alt="enter image description here"></a></p>

<p>Chessgames.com also has what you are looking for in terms of percentages here, but with much fewer games: <a href="https://www.chessgames.com/perl/explorer" rel="nofollow noreferrer">https://www.chessgames.com/perl/explorer</a></p>
