Link entire table row?

Use the ::before pseudo element. This way only you don't have to deal with Javascript or creating links for each cell. Using the following table structure

<table>
  <tr>
    <td><a href="http://domain.tld" class="rowlink">Cell</a></td>
    <td>Cell</td>
    <td>Cell</td>
  </tr>
</table>

all we have to do is create a block element spanning the entire width of the table using ::before on the desired link (.rowlink) in this case.

table {
  position: relative;
}

.rowlink::before {
  content: "";
  display: block;
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.5em; /* don't forget to set the height! */
}

demo

The ::before is highlighted in red in the demo so you can see what it's doing.

Unfortunately, no. Not with HTML and CSS. You need an a element to make a link, and you can't wrap an entire table row in one.

The closest you can get is linking every table cell. Personally I'd just link one cell and use JavaScript to make the rest clickable. It's good to have at least one cell that really looks like a link, underlined and all, for clarity anyways.

Here's a simple jQuery snippet to make all table rows with links clickable (it looks for the first link and "clicks" it)

$("table").on("click", "tr", function(e) {
    if ($(e.target).is("a,input")) // anything else you don't want to trigger the click
        return;

    location.href = $(this).find("a").attr("href");
});

I agree with Matti. Would be easy to do with some simple javascript. A quick jquery example would be something like this:

<tr>
  <td><a href="http://www.example.com/">example</a></td>
  <td>another cell</td>
  <td>one more</td>
</tr>

and

$('tr').click( function() {
    window.location = $(this).find('a').attr('href');
}).hover( function() {
    $(this).toggleClass('hover');
});

then in your CSS

tr.hover {
   cursor: pointer;
   /* whatever other hover styles you want */
}