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SQL Joins Vs SQL Subqueries (Performance)?
...
Sql server and MySql and ...Sql (excepting NoSql) are so similar in infrastructure. We have a kind of query optimization engine underneath which converts the IN (...) clauses to join (if it was possible). But when you have a Group by on a w...
How to SSH to a VirtualBox guest externally through a host? [closed]
...255.255.255.0
# reboot
Configure ssh service (administering) to login as root (not adviced)
Check if ssh is enabled
# svcs -a | grep ssh
online 15:29:57 svc:/network/ssh:default
Modify /etc/ssh/sshd_config so there is
PermitRootLogin yes
Restart ssh service
svcadm restart ssh
Fro...
How to get distinct values for non-key column fields in Laravel?
...er (you can use it, but you shouldn't use it). You should use distinct. In MySQL you can use DISTINCT for a column and add more columns to the resultset: "SELECT DISTINCT name, id, email FROM users". With eloquent you can do this with $this->select(['name', 'id', 'email'])->distinct()->get(...
How to let PHP to create subdomain automatically for each user?
...ary code from that tutorial:
<VirtualHost 111.22.33.55>
DocumentRoot /www/subdomain
ServerName www.domain.tld
ServerAlias *.domain.tld
</VirtualHost>
However as it required the use of VirtualHosts it must be set in the server's httpd.conf file, instead of a local .htaccess...
Apache is downloading php files instead of displaying them
...lation of modules like,
sudo apt-get install libapache2-mod-php7.0 php7.0-mysql php7.0-curl php7.0-json
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Best Practice: Software Versioning [closed]
...backward compatible within the major version. Changing from a hard coded MySQL implementation into a generic implementation could be a major version due to the size of the change, but could also be considered a feature change (minor) because it remains backward compatible.
– ...
A JRE or JDK must be available in order to run Eclipse. No JVM was found after searching the followi
...e file:
-vm
/absolute/path/to/jre6/bin
Update: I just nailed down the root cause on my own Windows machine. The GlassFish installer complained with exactly the same error message and after digging in GlassFish forums, the cause was clear: a corrupt JRE install on a Windows machine. My JRE came ...
Describe the architecture you use for Java web applications? [closed]
...r Leaderboards, using Ordered Lists.
Memcache for Token Store.
Database
MySQL, Memcached, Redis
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Ruby on Rails production log rotation
... used here and cause problems according to comment. And removed create 640 root adm as per comment suggested.
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What's the easiest way to install a missing Perl module?
...for installing. This is much safer, since it means that tests don't run as root.
If you have an old CPAN shell, simply install the new cpan ("install CPAN") and when you reload the shell, it should prompt you to configure these new directives.
Nowadays, when I'm on a system with an old CPAN, the f...