大约有 6,000 项符合查询结果（耗时：0.0163秒） [XML]
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...
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) :...
Could not load file or assembly 'System.Data.SQLite'
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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...
Fragment is not being replaced but put on top of the previous one
... your explanation. youtube.com/watch?v=EbcdMxAIr54
– SQL and Java Learner
Oct 17 '18 at 18:48
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The most sophisticated way for creating comma-separated Strings from a Collection/Array/List?
...question on stackoverflow dealing with how to insert a list of ids into an SQL statement.
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How to load json into my angular.js ng-model?
...s a list of Customer details, from an online copy of Microsoft's Northwind SQL Server database.
http://www.iNorthwind.com/Service1.svc/getAllCustomers
It returns some JSON data which looks like this:
{
"GetAllCustomersResult" :
[
{
"CompanyName": "Alfreds ...
Using LINQ to concatenate strings
...t takes a collection of values and returns a scalar value. Examples from T-SQL include min, max, and sum. Both VB and C# have support for aggregates. Both VB and C# support aggregates as extension methods. Using the dot-notation, one simply calls a method on an IEnumerable object.
Remember that agg...
How to load db:seed data into test database automatically?
...est:load is not executed if you have config.active_record.schema_format = :sql (db:test:clone_structure is)
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