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how to exclude null values in array_agg like in string_agg using postgres?
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SQL Fiddle
select
id,
(select array_agg(a) from unnest(canonical_users) a where a is n...
Mocking Extension Methods with Moq
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edited Jun 20 at 9:12
Community♦
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answered Aug 23 '11 at 6:20
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Clang vs GCC - which produces faster binaries? [closed]
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245
Here are some up-to-date albeit narrow findings of mine with GCC 4.7.2
and Clang 3.2 for C++....
How can I open several files at once in Vim?
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answered Jan 7 '10 at 20:09
skinpskinp
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PHP cURL vs file_get_contents
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129
file_get_contents() is a simple screwdriver. Great for simple GET requests where the header, HT...
Git - Difference Between 'assume-unchanged' and 'skip-worktree'
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2 Answers
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How to update bower.json with installed packages?
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answered Jan 27 '14 at 22:50
Helder RobaloHelder Robalo
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List of Stored Procedures/Functions Mysql Command Line
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edited Jun 29 '13 at 9:56
Michael Schmidt
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Has reCaptcha been cracked / hacked / OCR'd / defeated / broken? [closed]
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92
+50
I notice ...
SQL Server NOLOCK and joins
... this exercise. Begin a transaction and insert a row into table1 and table2. Don't commit or rollback the transaction yet. At this point your first query will return successfully and include the uncommitted rows; your second query won't return because table2 doesn't have the WITH(NOLOCK) hint on...