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Mysql error 1452 - Cannot add or update a child row: a foreign key constraint fails
...HERE column NOT IN
(SELECT intended_foreign_key FROM another_table)
so, more specifically:
SELECT sourcecode_id FROM sourcecodes_tags WHERE sourcecode_id NOT IN
(SELECT id FROM sourcecodes)
EDIT: IN and NOT IN operators are known to be much faster than the JOIN operators, as well as much easi...
Glorified classes in the Java language
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Create folder with batch but only if it doesn't already exist
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Google Maps API v3: Can I setZoom after fitBounds?
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What happens when a duplicate key is put into a HashMap?
...o you can determine what was there and maintain a reference if necessary.
More information here: HashMap Doc
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$(document).click() not working correctly on iPhone. jquery [duplicate]
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Passing variable number of arguments around
...he actual arguments passed in. See the GCC function attribute 'format' for more details: gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html.
– Doug Richardson
Nov 16 '13 at 19:00
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Difference between FetchType LAZY and EAGER in Java Persistence API?
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I'd like to add some more info to this answer from my book - To save memory, Lazy loading is generally used for one to many and many to many relationships. For one to one, generally Eager is used.
– Erran Morad
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Eclipse “Error: Could not find or load main class”
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