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Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
mysql_info [2009-10-15 12:35] Joakim Forsgren |
mysql_info [2009-10-15 12:36] Joakim Forsgren |
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Line 4: | Line 4: | ||
SELECT *, | SELECT *, | ||
+ | # För att ta bort, gör först en korrekt select | ||
+ | SELECT * FROM `lab5_Threads` RIGHT JOIN lab5_Items USING(ThreadID) WHERE Thread IS NULL | ||
+ | # sen ändrar man den till en delete | ||
DELETE lab5_Items FROM `lab5_Threads` RIGHT JOIN lab5_Items USING(ThreadID) WHERE Thread IS NULL | DELETE lab5_Items FROM `lab5_Threads` RIGHT JOIN lab5_Items USING(ThreadID) WHERE Thread IS NULL | ||
</ | </ |