vb.net - SQL: Query 2 tables to get latest date for each record -


i have 2 tables want query customer , service

customer table

    cnum       lastname        address       phone        comments             2         mckenzie        main street   1234567898   none      3         stevenson       south street  1225448844   none      4         adams           north street  1234545454   none

service 

     incidentnum     cnum      servicedate      status       category      lastupdated       x1               2        02-21-2013       closed       repair        02-21-2013      c2               2        05-12-2013       open         installation  05-13-2013      d2               3        05-01-2013       closed       repair        05-05-2013      f2               4        05-12-2013       open         repair        05-12-2013

basically want display records latest update each customer record, regardless if status closed or open.

final:

    cnum    lastname     address        phone        category       last service      2      mckenzie     main street    1234567898   installation   05-13-2013      3      stevenson    south street   1225448844   repair         05-05-2013      4      adams        north street   1234545454   repair         05-12-2013

im using oledb, project in vb. input appreciated. thank in advance!

can please try this?

select c.cnum, c.lastname, c.address, c.phone, s.category, s.servicedate  customer c,service s c.cnum = s.cnum group c.cnum having s.lastupdated = max(s.lastupdated)

Comments

Post a Comment

Popular posts from this blog

php - cannot display multiple markers in google maps v3 from traceroute result -

i'm newbie in php mysql , google maps v3. have problems in google maps v3. made traceroute web based , map traceroute's result in google maps v3 final project of college education. have try many tutorials didn't work. have tried tutorials in forum nothing worked. problem cannot display multiple markers got location data database. maybe because i'm newbie , not know how do. confuse looping show markers. here code <?php error_reporting(e_all ^ (e_notice)); ini_set('max_execution_time', 360); $enable_log_user = false; global $ip, $host_name, $host_ip; $host = @$_post['host']; $trace = @$_post['trace']; $self = $_server['php_self']; include("phpsqlajax_dbinfo.php"); $connection = mysql_connect ('127.0.0.1', $username, $password); if (!$connection) { die('not connected : ' . mysql_error());} $db_selected = mysql_select_db($database, $connection); if (!$db_selected) { die ('can\'t use db : ...
Read more

c# - DetailsView in ASP.Net - How to add another column on the side/add a control in each row? -

i have detailsview control on page used edit various fields of record, works in respect. i looking way add 1 column (and if works, why not more) right, absolutely read-only, show same fields of record comparison purposes. i aware there no obvious way such thing out of box detailsview . have looked other controls (transposed gridview , recommended formview , listview ), nothing satisfies. have special data binding setup using detailsview , can't out of without losing features. anyone on how "hack in" additional columns (for display only) on detailsview ? the solution have now, use second detailsview , visible set false in aspx. in code, make sure databind hidden detailsview hosts data third column first, initial detailsview named itemdetails . and in item created event, pass third column html rendering of hidden controls (in last code block) : protected void itemdetails_itemcreated(object sender, eventargs e) { if (dataite...
Read more

javascript - firefox memory leak -

i have following script (i use raphaeljs also) draws circle, waits 1 second, draws circle again, etc (you can copy paste - functional, need include raphael raphaeljs.com): <div id="holder"> </div> <script src="raphael.js" type="text/javascript"></script> <script> var paper = raphael(10, 50, 320, 200); var rad = math.pi / 180; var finangle = 0; function sector(cx, cy, r, startangle, endangle, params) { var x1 = cx + r * math.cos(-startangle * rad), x2 = cx + r * math.cos(-endangle * rad), y1 = cy + r * math.sin(-startangle * rad), y2 = cy + r * math.sin(-endangle * rad); return ["m", cx, cy, "l", x1, y1, "a", r, r, 0, +(endangle - startangle > 180), 0, x2, y2]; } var path = sector(100,100,50,0,180); var arc = paper.path(path); function draw() { path = sector(100,100,50,0,finangle); ...
Read more