大约有 3,620 项符合查询结果（耗时：0.0106秒） [XML]
.Contains() on a list of custom class objects
...to perform the check on.
This also has the benefit of working for LINQ-to-SQL queries as well as in-memory queries, where Contains doesn't.
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How can you do paging with NHibernate?
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This performs a SELECT TOP query in SQL Server. Try it with SetFirstResult(1).SetMaxResult(2);
– Chris S
Feb 8 '09 at 17:02
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How to show the last queries executed on MySQL?
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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...
MySQL - Get row number on select
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@Jared, MySQL syntax just needs something to be there. It can be anything, even x and y.
– Pacerier
Apr 24 '15 at 11:10
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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.
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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. :-)
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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]
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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
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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...