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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 [2010-12-10 10:33] Joakim Forsgren |
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====== Mysql info ====== | ====== Mysql info ====== | ||
- | Gick igen en SQL-fråga | + | Gick igen några |
- | < | + | < |
SELECT *, | SELECT *, | ||
+ | SELECT lab5_Threads.*, | ||
+ | |||
+ | |||
+ | # 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 | ||
</ | </ |