As monktim says - in this particular case it serves no purpose. You'd use that form to limit the rows that are updated, or fetch data with which you wish to update the target table with a join, like this:
update the_table
set col1 = t2.col2
from the_table t1
, other_table t2
where t2.id = t1.id
and t1.somecol = "some value"
and t2.anothercol = "some other value"
Having used Sybase for 15+ years I'm really used to this syntax, and I find it quite powerful (and you can do the same thing with DELETE of course).
Michael
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|