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Found 3 results

  1. hi, sorry, i have a question to do...but i know how to write in sql query ....however the answer need to write on relational algebra in query is like : SELECT * FROM operation where r='broken' group by pc having count(pc) >1 ; π id,pc,result ( σ r = 'broken' (operation)) like group by and having clasue...i no idea ... i searched on internet still @@ .... isnt the answer like that, i using split/step by step method to do rel 1 = σ r = 'broken' (operation) rel 2 = σ count(pc)>1 γ pc,count(pc) (rel 1)) rel 3 = π id,pc,result (rel 2 ) thanks
  2. ok, just quick... im getting this when trying to login: Unknown column 'e5035533a816cac4c54012281f58543d' in 'where clause' and this is my takelogin.php file: /*==========RUN LOGIN PROCEDURE===============*/$uname = sqlesc($_POST['username']); /*Form Names...*/$pass = sqlesc($_POST['password']); /*Form Names...*/if(isset($pass)){$passhash = md_5($pass); /*Securing The Data...*/}$query = "SELECT * FROM users WHERE username = $uname AND passhash = $passhash AND enabled = 'yes' AND status = 'confirmed'";$query_result = mysql_query($query)or die(mysql_error());//Running query to the DB...if(mysql_num_rows($query_result) == 1)/*if the DB returns somfthing, then run...*/{$row = mysql_fetch_array($query_result);$_SESSION['uid'] = $row['u_id'];$_SESSION['username'] = $row['username'];$_SESSION['pass'] = $row['passhash'];$_SESSION['status'] = $row['status'];$_SESSION['enabled'] = $row['enabled'];$_SESSION['email'] = $row['email'];$_SESSION['ip'] = $row['ip'];$_SESSION['class'] = $row['class'];$_SESSION['time_offset'] = $row['time_offset'];$_SESSION['dst_in_use'] = $row['dst_in_use'];$_SESSION['auto_correct_dst'] = $row['auto_correct_dst'];header('Refresh: 3; url=index.php');//with time delay...}else/*Error messeage...*/{$HTMLOUT .= "<center>Error reading login-session coding base, or a wrong username/pass inserted...</center>";header('Refresh: 3; url=index.php');//with time delay...}/*==========RUN LOGIN PROCEDURE===============*/ any ideas? Oo...
  3. I’m new to writing SQL, and most of my needs so far have been met in the wonderful w3 SQL tutorial. However, I have a desire I haven’t been able to find a way to do, and I can't find info on it in the forums either. I have 3 inner joined tables in the part of the code I’m struggling with. ClientsView EmployeeClients Employees For a given client (identified by ClientsView.client_id) there are many employees linked to the client. I want to search those employees and return in a single column “Primary_Staff” the employee assigned to the client who meets certain criteria. In all cases the field EmployeeClients.primary_flag will need to be “YES”. The kicker is that what I want it to look for is first to see if an employee is found where the Employee.profile_code = “MHP”. If so, that is the employee I want listed in the new “Primary_Staff” field. If no one is found with that profile code, then I want it to search the employees to see if any is found where Employee.profile_code = “On Call MHP”. Then Employee.profile_code = “LPE”. And a few others, but that’s enough for the example. If it goes through the list of profile codes I’m looking for and doesn’t find anyone, then I just want it to say “Unassigned.” Thanks in advance for the help, and let me know what other information is needed if you need more info to be able to give me some help.