Is it possible to make a simple query to count how many records I have in a determined period of time like a year, month, or day, having a...
What is the most efficient way to groupby objects in an array? For example, given this array of objects: [ { Phase: "Phase 1", Step: "Step 1", Task: "Task...
How can I do GroupBy multiple columns in LINQ Something similar to this in SQL: SELECT * FROM <TableName> GROUP BY <Column1>,<Column2> How can I convert this to LINQ:...
There is a table messages that contains data as shown below: Id Name Other_Columns ------------------------- 1 A A_data_1 2 A A_data_2 3 A A_data_3 4 B B_data_1 5 B...
Let’s suppose if we have a class like: class Person { internal int PersonID; internal string car; } I have a list of this class: List<Person> persons; And this...
I understand the point of GROUP BY x. But how does GROUP BY x, y work, and what does it mean? 3 Group By X means put all those...
As the title suggests, I’d like to select the first row of each set of rows grouped with a GROUP BY. Specifically, if I’ve got a purchases table that...