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mysql_info [2009-09-30 13:02]
Joakim Forsgren created 		mysql_info [2010-12-10 10:42]
Joakim Forsgren
Line 1: Line 1:
 ====== Mysql info ====== ====== Mysql info ======
-Gick igen en SQL-fråga +Gick igen några SQL-frågor 
-<code mysql>+<code>
 SELECT *,COUNT(ItemID) as Number FROM Threads LEFT JOIN Items USING(ThreadID) GROUP BY (ThreadID) SELECT *,COUNT(ItemID) as Number FROM Threads LEFT JOIN Items USING(ThreadID) GROUP BY (ThreadID)
 +
 +SELECT lab5_Threads.*,lab5_Users.*,COUNT(ItemID) as NumItems FROM `lab5_Threads` INNER JOIN `lab5_Users` USING(UserID) LEFT JOIN `lab5_Items` USING(ThreadID) GROUP BY ThreadID
 +
 +#För att ta bort gör först en select som funkar, när den är klar så skriv om den till en delete.
 +#Först en select
 +$query = "SELECT * 
 +FROM `lab5_Threads` LEFT JOIN `lab5_Items` USING(ThreadID) 
 +WHERE ThreadID = '" . $_POST['ThreadID'] . "' AND (lab5_Threads.UserID = '" . service_session::getInstance()->Get('UserID') . "' OR " . service_session::getInstance()->Get('Admin') . ")";
 +
 +#Sen gör man enkelt om det till en delete
 +$query = "DELETE lab5_Threads, lab5_Items 
 +FROM `lab5_Threads` LEFT JOIN `lab5_Items` USING(ThreadID) 
 +WHERE ThreadID = '" . $_POST['ThreadID'] . "' AND (lab5_Threads.UserID = '" . service_session::getInstance()->Get('UserID') . "' OR " . service_session::getInstance()->Get('Admin') . ")";
 +
 +#OBSERVERA att det bara är rad 1 som jag behöver ändra för att göra om en SELECT till en DELETE
 +
 </code> </code>