PHP Calendar use union or multiple query - php

Question

I have two separate calendars: reservation_schedule and maintenance_schedule calendars. Reservation_schedule fetch data from reservation table and maintenance_schedule fetch data from maintenance table. My goal is to put both fetched data from the two calendars into one calendar.
Here is the query I used for the reservation_schedule:
SELECT acode
FROM reservation
WHERE month(etd) = '".$month."'
AND dayofmonth(etd) = '".$dayArray["mday"]."'
AND year(etd) = '".$year."'
ORDER BY etd
And for the maintenance_schedule:
SELECT DISTINCT s.reg AS 'reg',
a.date AS 'date'
FROM (SELECT Curdate()
+ INTERVAL (a.a + (10 * b.a) + (100 * c.a)) day AS Date
FROM (SELECT 0 AS a
UNION ALL SELECT 1
UNION ALL SELECT 2
UNION ALL SELECT 3
UNION ALL SELECT 4
UNION ALL SELECT 5
UNION ALL SELECT 6
UNION ALL SELECT 7
UNION ALL SELECT 8
UNION ALL SELECT 9) AS a
CROSS JOIN (SELECT 0 AS a
UNION ALL SELECT 1
UNION ALL SELECT 2
UNION ALL SELECT 3
UNION ALL SELECT 4
UNION ALL SELECT 5
UNION ALL SELECT 6
UNION ALL SELECT 7
UNION ALL SELECT 8
UNION ALL SELECT 9) AS b
CROSS JOIN (SELECT 0 AS a
UNION ALL SELECT 1
UNION ALL SELECT 2
UNION ALL SELECT 3
UNION ALL SELECT 4
UNION ALL SELECT 5
UNION ALL SELECT 6
UNION ALL SELECT 7
UNION ALL SELECT 8
UNION ALL SELECT 9) AS c) a
INNER JOIN maintenance_sched s
ON a.date >= s.date_from
AND a.date <= s.date_to
WHERE Month(date) = '".$month."'
AND Dayofmonth(date) = '".$dayArray["mday"]."'
AND Year(date) = '".$year."'
I can show data from both of them by using UNION but I want the data from the maintenance table to be outputted as string with strikethrough. I'm outputting the query result in this code:
$chkEvent_res = mysql_query($chkEvent_sql) or die(mysql_error());
if (mysql_num_rows($chkEvent_res) > 0) {
$event_title = "<br/>";
while ($ev = mysql_fetch_array($chkEvent_res)) {
$event_title .= stripslashes($ev["reg"])."<br/>";
//$event_title .= "<del>".stripslashes($ev["acode"])."</del><br/>";
}
mysql_free_result($chkEvent_res);
} else {
$event_title = "";
}
If I use the query with UNION, I can't set the output string from maintenance to have strikethrough since it runs the query once. How can I achieve having the fetched data from maintenance table to output with strikethrough? Should I go for the one query with UNION? If I do, how can I separate the data coming from maintenance table and reservation table? If I go with separating the query, how can I run it? Should it be something like $chkEvent_res = mysql_query($chkEvent_sql1) and mysql_query($chkEvent_sql2) or die(mysql_error());? Please help, thanks.

Answer 1

The only way you can UNION these 2 queries is if you have the same number of columns in each query, and each column have the same data type. Not sure about the data types involved -- you have "acode" being returned from the first query and "reg" and "date" from the second query.
Assuming you could actually UNION your results and get what you need, you could consider adding an additional column to your results, returning the source of the query:
SELECT Field1, Field2, Field3, 'Table1' Source
FROM TABLE1
...
UNION
SELECT Field1, Field2, Field3, 'Table2' Source
FROM Table2
...
The you could use that Source column to format your results accordingly.
Here's some additional information about using UNION:
http://dev.mysql.com/doc/refman/5.0/en/union.html