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How do I modify a MySQL column to allow NULL?

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Alter Table Add Column Syntax

I'm trying to programmatically add an identity column to a table Employees. Not sure what I'm doing wrong with my syntax. 4...
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Compare two Byte Arrays? (Java)

I have a byte array with a ~known binary sequence in it. I need to confirm that the binary sequence is what it's supposed to be. I have tried .equals in addition to == , but neither worked. ...
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Differences between utf8 and latin1

what is the difference between utf8 and latin1? 2 Answers 2 ...
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Python: Using .format() on a Unicode-escaped string

I am using Python 2.6.5. My code requires the use of the "more than or equal to" sign. Here it goes: 3 Answers ...
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How to force a view refresh without having it trigger automatically from an observable?

Note: this is mostly for debugging and understanding KnockoutJS. 3 Answers 3 ...
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How can I remove an entry in global configuration with git config?

I ran a global configuration command in git to exclude certain files using a .gitignore_global file: 7 Answers ...
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differences between 2 JUnit Assert classes

The JUnit framework contains 2 Assert classes (in different packages, obviously) and the methods on each appear to be very similar. Can anybody explain why this is? ...
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How do I set a column value to NULL in SQL Server Management Studio?

How do I clear the value from a cell and make it NULL? 6 Answers 6 ...
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How do I convert an interval into a number of hours with postgres?

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