大约有 6,000 项符合查询结果（耗时：0.0270秒） [XML]
How to show the last queries executed on MySQL?
...
For those blessed with MySQL >= 5.1.12, you can control this option globally at runtime:
Execute SET GLOBAL log_output = 'TABLE';
Execute SET GLOBAL general_log = 'ON';
Take a look at the table mysql.general_log
If you prefer to output to a fi...
Daylight saving time and time zone best practices [closed]
...is no completely satisfying standard for persisting time. For example, the SQL standard and the ISO format (ISO 8601) are clearly not enough.
From the conceptual point of view, one usually deals with two types of time-date data, and it's convenient to distinguish them (the above standards do not) :...
MySQL - Get row number on select
...
@Jared, MySQL syntax just needs something to be there. It can be anything, even x and y.
– Pacerier
Apr 24 '15 at 11:10
...
Change from SQLite to PostgreSQL in a fresh Rails project
I have a rails app that's databases are in SQLite (The dev and production). Since I am moving to heroku, I want to convert my database to PostgreSQL.
...
How to get the nth occurrence in a string?
...it. A different though critical example: always enclose data when doing an SQL INSERT as mysqli_real_escape_string does not protect against single quote hacks. Much of professional coding is not just having good habits though also understanding why such habits are important. :-)
...
No mapping found for field in order to sort on in ElasticSearch
.... I was assuming it would treat null as being at the start or end (as with SQL ordering) but I believe it also triggers this error.
So if you see this error, you may need to ensure the sort attribute has a default value when it's sent to ElasticSearch.
I had this error with Rails+ElasticSearch+Tir...
How do I make a column unique and index it in a Ruby on Rails migration?
...or fine-grained control, there's a "execute" method that executes straight SQL.
That's it!
If you are doing this as a replacement for regular old model validations, check to see how it works. The error reporting to the user will likely not be as nice without model-level validations. You can always...
Recommended Fonts for Programming? [closed]
...
I use Consolas for everything, including Notepad++, SQL Studio, Eclipse, etc. I wish there was a Mac version. Also, if you notice, the text area field on Stack Overflow uses Consolas, so we have some other fans out there as well :p
...
Case-insensitive search in Rails model
... Thanks for the credit on creating the case-insensitive index in PostgreSQL. Credit back to you for showing how to use it in Rails! One additional note: if you use a standard finder, e.g. find_by_name, it still does an exact match. You have to write custom finders, similar to your "query" line a...
Could not load file or assembly 'System.Data.SQLite'
...
System.Data.SQLite.dll is a mixed assembly, i.e. it contains both managed code and native code. Therefore a particular System.Data.SQLite.dll is either x86 or x64, but never both.
Update (courtesy J. Pablo Fernandez): Cassini, the deve...