Query for select multiple values from 2 tables - php

Question

Table names:
tbla_can_types
Fields are fac_id,type_id,type_name,status
tbla_canteen_rates (there is no data in this table)
Fields are `fac_id,cat_id,type_id,from time,to_time,rate,off_rate,status,effective_date.,can_id(sequence number)
<?php
include('adodb/adodb.inc.php');
$conn=&ADONewconnection('oci8');
$conn->Pconnect('conn','hostname','username','pwd');
$fac_id=$_GET['fac_id'];
$cat_id=$_GET['cat_id'];
$file=fopen("text.txt","w+");
global $newId;
header("Content-type: text/xml");
echo('<?xml version="1.0" encoding="iso-8859-1"?>');
echo "<data>";
$ids = explode(",",$_POST["ids"]);
$rates="select type_id,from_time,to_time,rate,off_rate,status,to_char(effective_date,'dd-Mon-yyyy') e_date,can_id from tbla_canteen_rates where fac_id=$fac_id and cat_id=$cat_id order by to_number(substr(from_time,0,length(from_time)-3))";
$rs1=$conn->Execute($rates);
if(!$rs1->EOF)
echo $rs1->fields[0].'~'.$rs1->fields[1].'~'.$rs1->fields[2].'~'.$rs1->fields[3].'~'.$rs1->fields[4].'~'.$rs1->fields[5].'~'.$rs1->fields[6].'~'.$rs1->fields[7];
$temp_id=$rs1->fields[0];
echo $temp_id;
$rs1->MoveNext();
for ($i=0; $i < sizeof($ids); $i++)
{
$rowId = $ids[$i]; //id or row which was updated
$newId = $rowId; //will be used for insert operation
$mode = $_POST[$rowId."_!nativeeditor_status"]; //get request mode
switch($mode)
{
case "inserted":
$insert= "insert into tbla_canteen_rates(type_id,from_time,to_time,rate,off_rate,status,effective_date,fac_id,cat_id )values
($temp_id,
'".$_POST[$rowId."_c1"]."',
'".$_POST[$rowId."_c2"]."',
'".$_POST[$rowId."_c3"]."',
'".$_POST[$rowId."_c4"]."',
'".$_POST[$rowId."_c5"]."',to_date('".$_POST[$rowId."_c6"]."','dd-Mon-yyyy'),$fac_id,$cat_id)";
$conn->Execute($insert);
fwrite($file,$insert);
$action='add_row($rowId)';
break;
case "deleted":
$delete = "delete from tbla_canteen_rates where can_id=".$rowId ;
$conn->Execute($delete);
fwrite($file,$delete);
$action ='delete_row($rowId)';
break;
default:
$update ="update tbla_canteen_rates set
type_id=$temp_id,
from_time='".$_POST[$rowId."_c1"]."',
to_time='".$_POST[$rowId."_c2"]."',
rate='".$_POST[$rowId."_c3"]."',
off_rate='".$_POST[$rowId."_c4"]."',
status='".$_POST[$rowId."_c5"]."',
effective_date=to_date('".$_POST[$rowId."_c6"]."','dd-Mon-yyyy'),
fac_id='$fac_id',cat_id='$cat_id'
where can_id=".$rowId;
$conn->Execute($update);
fwrite($file,$update);
$action = 'update_row($rowId)';
break;
}
echo "<action type='".$action."' sid='".$rowId."' tid='".$newId."'/>";
}
echo "</data>";
?>
In the query i need id for type_id in a variable
i have written but every time it is getting id of first element only.
in this i need an id for type_id.
please send me the code 4 that
Regards
Pawan

Answer 1

I've got a sneaking suspicion that you've got several questions in there, but since you asked about the sql query, this should work:
Note: I'm assuming fac_id is the id that binds the two tables together. "var_fac_id" and "var_cat_id" are the values from your comboboxes.
Select t1.type_name, t2.from_time, t2.to_time, t2.rate
FROM tbla_can_types as t1 LEFT JOIN tbla_canteen_rates as t2
ON t1.fac_id = t2.fac_id
WHERE t1.fac_id = var_fac_id AND t2.cat_id = var_cat_id
Further notes: I think this should work despite the "AND t2.cat_id = var_cat_id" (which obviously would find not results in an empty table), since it's a left join. If it returns an empty set, however, see if it works if you remove it.
Update:
your comment above makes me think the tables are bound together by type_id instead. If that's the case, use ON t1.type_id = t2.type_id instead of ON t1.fac_id = t2.fac_id
Update #2 based on poster's comments
I'm not going to do your homework, dude. And homework is the only place where they'd tell you to not do joins. I will send you to some resources that will help you learn this stuff, though. Check out the basic mysql example from php.net: http://www.php.net/manual/en/mysql.examples-basic.php . That sample actually gets you pretty close to what you need. Also their overall mysql documentation, which is good for looking up what specific functions do: http://www.php.net/manual/en/book.mysql.php . Finally, remember that you're learning two languages here -- PHP, along with its functions to access a mysql DB, and -- SQL, which is a query language used within DBs. For SQL, check out http://sqlzoo.net/ , which seems a decent introduction on how to write queries.
Good luck on your assignment.