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How do I get SUM function in MySQL to return '0' if no values are found?
... as table_name,
'mixed null/non-null' as description,
21 as expected_sum,
COALESCE(SUM(val), 0) as actual_sum
FROM foo
UNION ALL
SELECT 'bar' as table_name,
'all non-null' as description,
21 ...
Placement of the asterisk in pointer declarations
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edited Oct 7 '08 at 21:56
answered Oct 7 '08 at 21:04
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How to do an INNER JOIN on multiple columns
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edited Mar 2 '10 at 21:39
answered Mar 2 '10 at 21:15
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fork() branches more than expected?
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answered Jun 21 '12 at 6:58
wallykwallyk
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How do I apply a CSS class to Html.ActionLink in ASP.NET MVC?
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answered Jun 15 '11 at 21:25
adamgedeadamgede
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What is the difference between Spring's GA, RC and M2 releases?
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edited Feb 23 '19 at 21:01
gavenkoa
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a...
Get $_POST from multiple checkboxes
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ʇolɐǝz ǝɥʇ qoq
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answered Feb 14 '11 at 21:06
Sean WalshSean Walsh
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grepping using the “|” alternative operator
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answered Jul 21 '11 at 12:21
Jeff FosterJeff Foster
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How to check if object (variable) is defined in R?
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answered Feb 20 '12 at 21:51
Dirk EddelbuettelDirk Eddelbuettel
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The simplest way to comma-delimit a list?
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answered Mar 21 '09 at 11:44
toolkittoolkit
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