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Can table columns with a Foreign Key be NULL?
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INSERT INTO child (id, parent_id) VALUES (2, 1);
-- ERROR 1452 (23000): Cannot add or update a child row: a foreign key
-- constraint fails (`t/child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY
-- (`parent_id`) REFERENCES `parent` (`id`))
The first insert will pass because we insert a NULL ...
How to resolve “Error: bad index – Fatal: index file corrupt” when using Git
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edited Sep 23 '15 at 17:24
answered Jul 12 '09 at 12:28
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What is the maximum recursion depth in Python, and how to increase it?
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513
It is a guard against a stack overflow, yes. Python (or rather, the CPython implementation) does...
How to make fill height
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psayre23psayre23
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Finding the source code for built-in Python functions?
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135
Since Python is open source you can read the source code.
To find out what file a particular m...
How to iterate through SparseArray?
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edited Jun 29 '17 at 11:13
Michael
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answered Nov...
Get url parameters from a string in .NET
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Importance of varchar length in MySQL table
...rtelli
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How to call getClass() from a static method in Java?
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Mark PetersMark Peters
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java.lang.OutOfMemoryError: Java heap space
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– Thomas Owens
Oct 20 '09 at 18:03
Default values change with java versions, it would be nice to include this infor...