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Get records with max value for each group of grouped SQL results
...'s a super-simple way to do this in mysql:
select *
from (select * from mytable order by `Group`, age desc, Person) x
group by `Group`
This works because in mysql you're allowed to not aggregate non-group-by columns, in which case mysql just returns the first row. The solution is to first order th...
Markdown and image alignment
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I like to be super lazy by using tables to align images with the vertical pipe (|) syntax. This is supported by some Markdown flavours (and is also supported by Textile if that floats your boat):
| I am text to the left |  |
or
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Difference between string and text in rails?
...gines can load varchar in one go, but store text (and blob) outside of the table. A SELECT name, amount FROM products could, be a lot slower when using text for name than when you use varchar. And since Rails, by default loads records with SELECT * FROM... your text-columns will be loaded. This will...
Can I use non existing CSS classes?
I have a table where I show/hide a full column by jQuery via a CSS class that doesn't exist:
13 Answers
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vs
...nicode TR, the C++ standard library provides the 25 C headers, as shown in Table 151.
Which include:
<assert.h> <float.h> <math.h> <stddef.h> <tgmath.h>
<complex.h> <inttypes.h> <setjmp.h> <stdio.h> <time.h>
<ctype.h> <iso646.h&g...
Best way to detect Mac OS X or Windows computers with JavaScript or jQuery
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The property is also read-only
I could came up with the following table
Mac Computers
Mac68K Macintosh 68K system.
MacPPC Macintosh PowerPC system.
MacIntel Macintosh Intel system.
iOS Devices
iPhone iPhone.
iPod iPo...
How to execute a MySQL command from a shell script?
...h shell scripting and SQL. If you need to use them in SQL for specifying a table or database name you'll need to escape them in the shell script like so:
mysql -p=password -u "root" -Bse "CREATE DATABASE \`${1}_database\`;
CREATE USER '$1'@'%' IDENTIFIED BY '$2';
GRANT ALL PRIVILEGES ON `${1}_datab...
Which @NotNull Java annotation should I use?
...nt approaches. Some packages use JLS 9.6.4.1 style contexts. The following table gives an overview:
FIELD METHOD PARAMETER LOCAL_VARIABLE
android.support.annotation X X X
edu.umd.cs.findbugs.annotations X X X X
org.jetbra...
How can I pass selected row to commandLink inside dataTable or ui:repeat?
I'm using Primefaces in a JSF 2 application. I have a <p:dataTable> , and instead of selecting rows, I want the user to be able to directly execute various actions on individual rows. For that, I have several <p:commandLink> s in the last column.
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Tab space instead of multiple non-breaking spaces (“nbsp”)?
...t you really want, but its browser support has been erratic. Failing that, table-layout or maybe flexbox are your best bets.
– Alohci
May 30 '17 at 12:53
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