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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 ...
Convert a list of objects to an array of one of the object's properties
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answered Jan 21 '11 at 23:55
BrokenGlassBrokenGlass
145k2626 gold badges263263 silver badges313313 bronze badges
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If vs. Switch Speed
...ng right?
– yazanpro
Nov 16 '12 at 21:19
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How to set Python's default version to 3.x on OS X?
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21 Answers
21
Active
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What does @@variable mean in Ruby?
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answered May 4 '11 at 21:42
Michelle TilleyMichelle Tilley
146k3737 gold badges348348 silver badges300300 bronze badges
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Set background color of WPF Textbox in C# code
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– BlueRaja - Danny Pflughoeft
Apr 29 '10 at 21:45
6
Be sure to include System.Windows.Media.
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Bash script - variable content as a command to run
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217
You just need to do:
#!/bin/bash
count=$(cat last_queries.txt | wc -l)
$(perl test.pl test2 $...
How can I make Vim's `J` and `gq` commands use one space after a period?
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edited Jan 21 '11 at 16:06
answered Jan 21 '11 at 15:24
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Build Maven Project Without Running Unit Tests
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edited Dec 21 '19 at 7:15
Habeeb Perwad
6,1451212 gold badges7070 silver badges117117 bronze badges
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__init__ for unittest.TestCase
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edited Jun 27 '13 at 21:26
answered Jun 27 '13 at 21:11
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