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what is the difference between GROUP BY and ORDER BY in sql
... SUM, COUNT, AVG, etc).
TABLE:
ID NAME
1 Peter
2 John
3 Greg
4 Peter
SELECT *
FROM TABLE
ORDER BY NAME
=
3 Greg
2 John
1 Peter
4 Peter
SELECT Count(ID), NAME
FROM TABLE
GROUP BY NAME
=
1 Greg
1 John
2 Peter
SELECT NAME
FROM TABLE
GROUP BY NAME
HAVING Count(ID) > 1
=
Peter
...
MySQL Insert Where query
...INSERT INTO Users(weight, desiredWeight)
VALUES (160,145)
INSERT using a SELECT statement
INSERT INTO Users(weight, desiredWeight)
SELECT weight, desiredWeight
FROM AnotherTable
WHERE id = 1
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How can I redirect HTTP requests made from an iPad?
...oding: gzip, deflate
Connection: keep-alive
Weblock is also good to selectively redirect some URL's with regular expressions.
You could redirect queries to certain endpoint only, while all other queries go to the IP returned from the DNS. This actually allows for even more fitting configurati...
Vim: faster way to select blocks of text in visual mode
I have been using vim for quite some time and am aware that selecting blocks of text in visual mode is as simple as SHIFT + V and moving the arrow key up or down line-by-line until I reach the end of the block of text that I want selected.
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How to get Bitmap from an Uri?
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I don't understand how this is the selected answer
– Nick Cardoso
Feb 27 '14 at 23:45
12
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Can I apply the required attribute to fields in HTML5?
How can I check if a user has selected something from a <select> field in HTML5?
13 Answers
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Postgres DB Size Command
..."pg_datbase" system table. Just apply the function to the names, as below.
select t1.datname AS db_name,
pg_size_pretty(pg_database_size(t1.datname)) as db_size
from pg_database t1
order by pg_database_size(t1.datname) desc;
If you intend the output to be consumed by a machine instead of a...
How do you run NUnit tests from Jenkins?
...y]$files = get-childitem $sourceDirectory -include $fileFilters -recurse | select -expand FullName | where {$_ -like $filterText}
foreach ($file in $files)
{
$cFiles = $cFiles + $file + " "
}
# set all arguments and execute the unit console
$argumentList = @("$cFiles", "/framework:net-4.5", "/...
JSON.NET Error Self referencing loop detected for type
...ceLoopHandling = ReferenceLoopHandling.Ignore,
}, ArrayPool<char>.Shared));
});
}
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jQuery see if any or no checkboxes are selected
I know how to see if an individual checkbox is selected or not.
8 Answers
8
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