My query or i might be wrong?

Question

I have one MYSQL query Which I think is right but not know it
is right or not:
it does not produce the required output as i have records in
the database:
here is the query:
<cfquery datasource="#request.dsn#" name="newclass"
username="#request.user#" password="#request.pass#">
SELECT grcat.cid,grcat.title, count(listid) as totallist
FROM grcat
LEFT JOIN grlist ON grcat.cid = grlist.cid
WHERE
parentid = <cfqueryparam cfsqltype="cf_sql_numeric"
value="#url.cid#">
AND
active = <cfqueryparam cfsqltype="cf_sql_tinyint"
value="1">
GROUP BY
grcat.cid
</cfquery>
<cfdump var="#newclass#">

Answer 1

quote:
Originally posted by:
Newsgroup User
it is just a precaution against having NULL as totallist
value.
but with MySQL as your db you do not really need it since
COUNT(expr) in
MySQL will count only non-null values, and return 0 if there
are no
matching rows (i.e. if they are all NULL)
as for your problem:
1) what is the value of #url.cid# when you run your original
query?
2) are there any records in your grcat table that actually
have the
field parentid with the value of url.cid variable? run this
query to
check that you actually have the data in your table you think
you have
in there:
SELECT grcat.cid, grcat.parentid, grcat.title,
COUNT(grlist.listid) AS
totallist
FROM grcat LEFT JOIN grlist ON grcat.cid = grlist.cid
WHERE grlist.active = <cfqueryparam
cfsqltype="cf_sql_tinyint" value="1">
GROUP BY
grcat.cid
3) see if this query does what you want it to do:
SELECT grcat.cid, grcat.title, COUNT(grlist.listid) AS
totallist
FROM grcat LEFT JOIN grlist ON grcat.cid = grlist.cid AND
grlist.active
= <cfqueryparam cfsqltype="cf_sql_tinyint" value="1">
WHERE grcat.parentid = <cfqueryparam
cfsqltype="cf_sql_integer"
value="#url.cid#">
GROUP BY
grcat.cid
4) are you sure it is the parentid field you need to compare
to #url.cid# ?
5) if nothing above worked, see if this query does:
SELECT grcat.cid, grcat.title, sq_grlist.totallist
FROM grcat
LEFT JOIN
(SELECT grlist.cid, COUNT(grlist.listid) AS totallist FROM
grlist WHERE
grlist.active = <cfqueryparam cfsqltype="cf_sql_tinyint"
value="1">
GROUP BY grlist.cid) sq_grlist ON grcat.cid = sq_grlist.cid
WHERE grcat.parentid = <cfqueryparam
cfsqltype="cf_sql_integer"
value="#url.cid#">
GROUP BY
grcat.cid
Azadi Saryev
Sabai-dee.com
http://www.sabai-dee.com/
All of the the qUERY
SELECT grcat.cid, grcat.title, COUNT(grlist.listid) AS totallist
FROM grcat LEFT JOIN grlist ON grcat.cid = grlist.cid AND
grlist.active
= <cfqueryparam cfsqltype="cf_sql_tinyint" value="1">
WHERE grcat.parentid = <cfqueryparam
cfsqltype="cf_sql_integer"
value="#url.cid#">
GROUP BY
grcat.cid
This Woked. Thanks U All Guys
Hats Off