One of my recent assignments was to create a “Recently Updated List”

This list will contain the trackID, and a Title… it will sort by the date in descending order so we always see the most recent items first… It will join 2 tables – items(v_items), and events…

Items is the Main table, and Events are details about that item that happen along the tracking of that item…

For example, say you have track 897 897
========
(below are events)
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edited by axel on 11/11/06 @ 2:00pm

We now are finished with this track
—————————————–
—————————————–
edited by axel on 11/11/06 @ 1:30pm

We did something else
—————————————–
—————————————–
edited by axel on 11/11/06 @ 1:00pm

we edited the table in the database to meet a need
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<cfquery datasource=“#Application.AdminDsn#” name=“getFeaturesList”>
SELECT
v.itemid, v.title,
e.datecreated, e.eventid
FROM v_items v
INNER Join Events e
ON v.itemid = e.itemid
WHERE
e.eventid in (
SELECT TOP 1 e2.eventid
FROM events e2
WHERE e2.itemid = v.itemid
AND e.createdbyuserid = 92
ORDER BY e2.datecreated desc
)
AND
e.datecreated >
<cfqueryparam cfsqltype=“cf_sql_date”
value=“#DateAdd(‘m’,-1,Now())#”/>
AND v.statusID IN (5)
ORDER BY e.datecreated desc
</cfquery>

<select name=“Seminars” multiple=“multiple” size=“10″>
<cfloop query=“somequery”>
<option value=“#seminarid#”>#title#</option>
</cfloop>
</select>

when you submit the page, and you select multiple items from the box, you’re going to get a list returned back in the form.seminars… ie. (1,2,3), here you could utilize the list attribute in cfqueryparam to work for you in trying to grab some rows from the database only where what was selected is relevant…

<cfquery name=“qGetSeminarsUsers” datasource=“#datadsn#”>
SELECT
su.userid, su.seminarid as id, su.fname, su.lname, su.email
FROM seminarusers su
WHERE su.seminarid IN
(
<cfqueryparam list=“yes”
cfsqltype=“cf_sql_integer”
value=“#arguments.seminars#”
/>
)
</cfquery>

as a begginer you may try to loop through the list in your query to grab all of the id’s and use a lot of “AND” “OR” sql statments in you’re WHERE clause. BUT using the “IN” clause in conjunction the the list=”yes” feature of cfqueryparam, it makes this query a breeze.

<cfquery name=“getConcernDetails” datasource=“#someDSN#”>
SELECT
C.concernID, C.ClientID, C.DateCreated,
C.Status, C.ClientEmail, C.isConcern,
C.ownerID, C.ownerGroupID,
a.userID, a.username, s.label

FROM
unmc_Concerns C JOIN WLTAdminusers a ON c.ownerID = a.userid
JOIN WLTsecurity s ON C.ownerGroupID = s.secid

WHERE
C.ConcernID = <cfqueryparam cfsqltype=“cf_sql_integer” value=“#url.var_details#” />
ORDER BY
C.ConcernID
</cfquery>

When you click on the hotlist tab you will see the query

version 1: Problems… i was including the date in my query using a group by

<cfquery datasource=“#variables.dsn#” name=“qHotList”>
SELECT   l.artistID, l.AlbumID, l.Date, count(l.ArtistID) as recordCount, art.Artist, alb.Title
FROM tblLogger l, tblArtists art, tblAlbums alb

WHERE l.ArtistID=art.ArtistID
AND l.AlbumID=alb.AlbumID
AND Date
BETWEEN ’10/15/06′ and ’10/18/06′

GROUP BY l.ArtistID,l.AlbumID, l.Date, art.Artist, alb.Title
ORDER BY recordCount DESC
</cfquery>

the result of this would be for instance
==============================================
Artist – Album
#1. 311 – Greatest Hits
#2. 311 – Greatest Hits
#3. 311 – Greatest Hits
#4. A.F.I – Decemberunderground
#5. A.F.I – Decemberunderground
#6. A.F.I – Decemberunderground
==============================================
I couldn’t understand why I was getting multiple rows? It was very confusing to me… I asked my boss who runs (Mark Kruger!) and he informed me what was going on in the query and the reason i was getting multiple entries (1 for each day that had gone by) was because of my “date” column.

Here is version 2:

<cfquery datasource=“#variables.dsn#” name=“qHotList”>
SELECT   l.artistID, l.AlbumID, count(l.ArtistID) as recordCount, art.Artist, alb.Title
FROM tblLogger l, tblArtists art, tblAlbums alb

WHERE l.ArtistID=art.ArtistID
AND l.AlbumID=alb.AlbumID
AND Date
BETWEEN ’10/15/06′ and ’10/18/06′

GROUP BY l.ArtistID,l.AlbumID, art.Artist, alb.Title
ORDER BY recordCount DESC
</cfquery>

the result of this would be for instance
==============================================
Artist – Album
#1. 311 – Greatest Hits
#2. A.F.I – Decemberunderground
==============================================
And now the query works giving me a hot list of albums and artists that people have chosen on my site…

UPDATE supplierlist
SET cost =
CASE
WHEN (select id from item where id = itemid) = itemid
THEN (select cost from item where id = itemid)
else cost
END

this query updates TWO tables from a base table… in our example it updates all of the suppliers cost, in the items table… it’s pretty cool