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What are the advantages of using a schema-free database like MongoDB compared to a relational databa
I'm used to using relational databases like MySQL or PostgreSQL, and combined with MVC frameworks such as Symfony, RoR or Django, and I think it works great.
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Count(*) vs Count(1) - SQL Server
...not the case for Oracle or most other modern RDBMS but is the case for old MySQL's storage engine, MyISAM), then COUNT(*) would just need to take the value from the metadata.
– Quassnoi
Oct 31 '18 at 18:29
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Storing money in a decimal column - what precision and scale?
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For Mysql, I recommend storing the integer (2500) as a bigint if you intend on sorting by the amount. And don't waste your time with PHP 32bit when dealing with big integers, upgrade to 64bit or Node.JS ;)
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MIN/MAX vs ORDER BY and LIMIT
...OM `tbl`;
Simply because it is ANSI compatible. Limit 1 is particular to MySql as TOP is to SQL Server.
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Multiple columns index when using the declarative ORM extension of sqlalchemy
...f you have a dictionary for table_args like I currently do? table_args = {'mysql_engine':'InnoDB'}
– Nick Holden
Sep 1 '11 at 8:39
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Does SQLAlchemy have an equivalent of Django's get_or_create?
...ote that begin_nested automatically triggers a flush.
Note that if using MySQL, the transaction isolation level must be set to READ COMMITTED rather than REPEATABLE READ for this to work. Django's get_or_create (and here) uses the same stratagem, see also the Django documentation.
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What is the point of interfaces in PHP?
...ce IPersonService
{
public function Create($personObject);
}
class MySqlPerson implements IPersonService
{
public function Create($personObject)
{
// Create a new person in MySql database.
}
}
class MongoPerson implements IPersonService
{
public function Create($pers...
differentiate null=True, blank=True in django
...ent kinds of "blanky" values. I just tested this behaviour with Django 1.8/MySQL 5.6
– Edward D'Souza
Aug 3 '16 at 17:14
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How do I delete a fixed number of rows with sorting in PostgreSQL?
I'm trying to port some old MySQL queries to PostgreSQL, but I'm having trouble with this one:
6 Answers
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How to organize a node app that uses sequelize?
...getting data completely. And reasons are - imagine that you don't just use MySQL (in my case, I use MySQL and MongoDB side by side), but you can get your data from any data provider and any transport method, e.g. SQL, no-SQL, filesystem, external API, FTP, SSH etc. If you tried to do all of it in th...