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When should I use cross apply over inner join?
...
201
cross apply sometimes enables you to do things that you cannot do with inner join.
Example (a ...
Unique combination of all elements from two (or more) vectors
...aybe what you are after
> expand.grid(a,b)
Var1 Var2
1 ABC 2012-05-01
2 DEF 2012-05-01
3 GHI 2012-05-01
4 ABC 2012-05-02
5 DEF 2012-05-02
6 GHI 2012-05-02
7 ABC 2012-05-03
8 DEF 2012-05-03
9 GHI 2012-05-03
10 ABC 2012-05-04
11 DEF 2012-05-04
12 GHI 2012-05-04
13 AB...
PHP Regex to check date is in YYYY-MM-DD format
...
Try this.
$date="2012-09-12";
if (preg_match("/^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])$/",$date)) {
return true;
} else {
return false;
}
share
...
Group a list of objects by an attribute : Java
...i FedorenkoVitalii Fedorenko
91.6k2424 gold badges140140 silver badges111111 bronze badges
...
“CASE” statement within “WHERE” clause in SQL Server 2008
... THEN co.DTEntered
ELSE '2011-01-01'
END
But it won't work the way you have written them eg:
WHERE
CASE LEN('TestPerson')
WHEN 0 THEN co.personentered = co.personentered
ELSE co.personentered LIKE '%TestPerso...
SQL “between” not inclusive
...fix this is:
SELECT *
FROM Cases
WHERE cast(created_at as date) BETWEEN '2013-05-01' AND '2013-05-01'
Another way to fix it is with explicit binary comparisons
SELECT *
FROM Cases
WHERE created_at >= '2013-05-01' AND created_at < '2013-05-02'
Aaron Bertrand has a long blog entry on dates...
How to add leading zeros for for-loop in shell? [duplicate]
...
Use the following syntax:
$ for i in {01..05}; do echo "$i"; done
01
02
03
04
05
Disclaimer: Leading zeros only work in >=bash-4.
If you want to use printf, nothing prevents you from putting its result in a variable for further use:
$ foo=$(printf "%02d" 5)
$...
What are the “standard unambiguous date” formats for string-to-date conversion in R?
...n-'NA' element,
and give an error if neither works.
as.Date("01 Jan 2000") yields an error because the format isn't one of the two listed above. as.Date("01/01/2000") yields an incorrect answer because the date isn't in one of the two formats listed above.
I take "standard unambiguo...
What is the difference between C# and .NET?
... and .NET can evolve separately though there is connection via the CTS. VS2012 e.g. not support C# 6 compiler but works with .NET 4.6
– Frank Q.
Mar 17 '18 at 6:05
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CMake使用教程 - C/C++ - 清泛网 - 专注C/C++及内核技术
... 1: TutorialRuns
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Start 4: TutorialSmall
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