On Saturday, 10 January 2015 at 20:19:14 UTC, Andrei Alexandrescu
wrote:
groupBy is an important primitive for relational algebra
queries on data. Soon to follow are operators such as
aggregate() which is a sort of reduce() but operating on ranges
of ranges.
GroupBy is a very important
groupBy is an important primitive for relational algebra queries on
data. Soon to follow are operators such as aggregate() which is a sort
of reduce() but operating on ranges of ranges. With those in tow, a
query such as
SELECT COUNT(*), SUM(x) FROM data GROUP BY userid
can be expressed as:
On Saturday, 10 January 2015 at 20:19:14 UTC, Andrei Alexandrescu
wrote:
groupBy is an important primitive for relational algebra
queries on data. Soon to follow are operators such as
aggregate() which is a sort of reduce() but operating on ranges
of ranges. With those in tow, a query such as
On Saturday, 10 January 2015 at 20:19:14 UTC, Andrei
Alexandrescu wrote:
groupBy is an important primitive for relational algebra
queries on data. Soon to follow are operators such as
aggregate() which is a sort of reduce() but operating on ranges
of ranges. With those in tow, a query such as
It would be interesting if we could make it possible to do a
translation between D and SQL, similar to how LINQ is
implemented internally, but preferably have it done at
compile-time rather than at runtime.
Have you seen Hibernated?
https://github.com/buggins/hibernated
