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SQL Joins Vs SQL Subqueries (Performance)?
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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...
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.
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Adding a public key to ~/.ssh/authorized_keys does not log me in automatically
...ider the excellent http://www.fail2ban.org
8. Extra
SSH tunnel to access a MySQL (bind = 127.0.0.1) server
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LEFT JOIN only first row
...t's heavier for getting the data as it created a temporary table... I wish MySql could have a LIMIT on the LEFT JOIN level.
– Shadoweb
Feb 20 '17 at 11:25
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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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SQL JOIN vs IN performance?
...y you mention that, I did a blog post on this very subject.
See Oracle vs MySQL vs SQL Server: Aggregation vs Joins
Short answer: you have to test it and individual databases vary a lot.
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Primary key/foreign Key naming convention [closed]
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The "using" keyword is MySql specific. Doesn't work in T-SQL—unfortunately.
– birdus
Aug 8 '17 at 18:46
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Add … if string is too long PHP [duplicate]
I have a description field in my MySQL database, and I access the database on two different pages, one page I display the whole field, but on the other, I just want to display the first 50 characters. If the string in the description field is less than 50 characters, then it won't show ... , but if...
JavaScript - onClick to get the ID of the clicked button
...c functionality. I'm working on adding functions to a dynamic DB using PHP/MySQL and JS; this works out well for adding a specific function to specific dynamic classes. Thanks!
– ejbytes
Sep 8 '16 at 23:21
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How to check if a Constraint exists in Sql server?
... There's nothing wrong in brackets. This is a SQL Server question, not a MySQL one.
– Álvaro González
Feb 25 '14 at 17:45
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