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Denham
The for loop is a lot easier to read. It can be a real pain scrolling to
the top every time you want to see what such-and-such a cursor is doing. On
the other hand, it can be a bit limiting in more 'advanced' situations - eg.
you can't mess around with cursor%rowtype variables and you can't fetch from
the cursor in more than one place.
Regards
David Lord
-----Original Message-----
Sent: 24 February 2003 08:39
To: Multiple recipients of list ORACLE-L
Hello,
I was just asked by one of our developers which is beter to use:-
a cursor or a for loop?
I must admit I am not sure....
Anyway the specific piece of code in discussion is similar to the
following....
FOR X IN (SELECT X FROM TABLE_NAME
WHERE COL1 = 'Something'))
LOOP
Do a whole lot of stuff in database here......
LOOP END;
I would guess that the cursor would follow similar execution criteria but
using
the cursor syntax.
Any ideas?
TIA
regards
Denham Eva
Oracle DBA
The real problem is not whether machines think but whether men do.
- B. F. Skinner
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<TITLE>Which is beter a cursor or a for loop?</TITLE>
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<DIV><SPAN class=741430311-24022003><FONT face="Courier New"
size=2>Denham</FONT></SPAN></DIV>
<DIV><SPAN class=741430311-24022003><FONT face="Courier New"
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=741430311-24022003><FONT face="Courier New" size=2>The for loop
is a lot easier to read. It can be a real pain scrolling to the top every
time you want to see what such-and-such a cursor is doing. On the other
hand, it can be a bit limiting in more 'advanced' situations - eg. you can't
mess around with cursor%rowtype variables and you can't fetch from the cursor in
more than one place.</FONT></SPAN></DIV>
<DIV><SPAN class=741430311-24022003><FONT face="Courier New"
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=741430311-24022003><FONT face="Courier New"
size=2>Regards</FONT></SPAN></DIV>
<DIV><SPAN class=741430311-24022003><FONT face="Courier New" size=2>David
Lord</FONT></SPAN></DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Denham Eva
[mailto:[EMAIL PROTECTED]<BR><B>Sent:</B> 24 February 2003 08:39<BR><B>To:</B>
Multiple recipients of list ORACLE-L<BR><B>Subject:</B> Which is beter a
cursor or a for loop?<BR><BR></FONT></DIV>
<P><FONT face=Arial size=2>Hello,</FONT> </P>
<P><FONT face=Arial size=2>I was just asked by one of our developers which is
beter to use:-</FONT> <BR><FONT face=Arial size=2>a cursor or a for
loop?</FONT> <BR><FONT face=Arial size=2>I must admit I am not sure....</FONT>
</P>
<P><FONT face=Arial size=2>Anyway the specific piece of code in discussion is
similar to the following....</FONT> <BR><FONT face=Arial size=2>
</FONT><BR> <FONT face=Arial
size=2>FOR X IN (SELECT X FROM TABLE_NAME</FONT>
<BR>
<FONT face=Arial
size=2> WHERE COL1 = 'Something'))</FONT> <BR><FONT
face=Arial
size=2>
LOOP</FONT> <BR><FONT face=Arial
size=2>
Do a whole lot of stuff in database here......</FONT> <BR><FONT face=Arial
size=2> LOOP
END;</FONT> </P>
<P><FONT face=Arial size=2>I would guess that the cursor would follow similar
execution criteria but using </FONT><BR><FONT face=Arial size=2>the cursor
syntax.</FONT> </P>
<P><FONT face=Arial size=2>Any ideas?</FONT> </P>
<P><FONT face=Arial size=2>TIA</FONT> <BR><FONT face=Arial
size=2>regards<B><I></I></B></FONT><B><I></I></B> <BR><B><I><FONT
face=Arial>Denham Eva</FONT></I></B> <BR><B><I><FONT face=Arial size=2>Oracle
DBA</FONT></I></B> <BR><I><FONT face=Arial size=2>The real problem is not
whether machines think but whether men do.</FONT></I> <BR><I><FONT face=Arial
size=2>- B. F. Skinner</FONT></I> </P><STRONG><FONT face=Arial color=#0000a0>
<P>
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