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Group a list of objects by an attribute : Java
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Implement SQL GROUP BY Feature in Java using Comparator, comparator will compare your column data, and sort it. Basically if you keep sorted data that looks as grouped data, for example if you have same repeated column data then sort m...
Linq select objects in list where exists IN (A,B,C)
... select order;
It's the opposite to what you know from SQL this is why it is not so obvious.
Of course, if you prefer fluent syntax here it is:
var filteredOrders = orders.Order.Where(order => new[] {"A", "B", "C"}.Any(s => s == order.StatusCode));
Here we again see one...
What are naming conventions for MongoDB?
...sonal preference. My preferences come from using NHibernate, in .NET, with SQL Server, so they probably differ from what others use.
Databases: The application that's being used.. ex: Stackoverflow
Collections: Singular in name, what it's going to be a collection of, ex: Question
Document fields, ...
MySQL show current connection info
I am in a MySQL terminal session but I don't know what server I am connected to, or what database I am connected to.
3 Ans...
Why is MySQL's default collation latin1_swedish_ci?
...was co-head of a Swedish company.
Possibly for similar reasons, Microsoft SQL Server's default language us_english.
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Display milliseconds in Excel
...edded query, the ss.000 does not work. I can paste the query results (from SQL Server Management Studio), and format the time just fine. But when I embed the query as a Data Connection in Excel, the format always gives .000 as the milliseconds.
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Why am I getting a NoClassDefFoundError in Java?
...hese due to the jar working with spring, but seems to not be liked by java.sql (in my case the sap db driver for Hana).
– J E Carter II
Jun 19 '17 at 19:48
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difference between Product Backlog Item and Feature in Team Foundation work item types
... answered May 3 '15 at 3:38
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How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?
In PostgreSQL I have a table with a varchar column. The data is supposed to be integers and I need it in integer type in a query. Some values are empty strings.
The following:
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How do you list all triggers in a MySQL database?
What is the command to list all triggers in a MySQL database?
4 Answers
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