Thanks for detailed responses Val, I appreciate it. On Saturday, November 14, 2020 at 4:51:06 PM UTC-8 valq...@gmail.com wrote:
> I made even CTE+recursive: > https://github.com/web2py/pydal/issues/627 > > But have no time to make a PR > > воскресенье, 15 ноября 2020 г. в 03:41:24 UTC+3, valq...@gmail.com: > >> for example, you can use window function to get records with count in >> one query: >> db(...).select( ... , 'count(id) OVER() AS cnt' ) >> >> >> воскресенье, 15 ноября 2020 г. в 03:35:34 UTC+3, valq...@gmail.com: >> >>> It was in 2017 >>> Now you can pass to select raw-sql-strings with any expression, just end >>> with ' ... *AS* some_name' (*AS* must be in uppercase ) >>> >>> воскресенье, 15 ноября 2020 г. в 02:54:53 UTC+3, alexg...@gmail.com: >>> >>>> looks like need executeSQL needed for string_agg: >>>> Is it possible to do more advanced queries (like using string_agg) with >>>> DAL in the meantime? >>>> Massimo Di Pierro >>>> Apr 12, 2017, 4:21:36 AM >>>> to web...@googlegroups.com >>>> You have to use db.executesql for that. Sorry. >>>> >>>> On Saturday, November 14, 2020 at 3:28:06 PM UTC-8 valq...@gmail.com >>>> wrote: >>>> >>>>> just replace *GROUP_CONCAT* with *string_agg * >>>>> >>>>> воскресенье, 15 ноября 2020 г. в 02:19:52 UTC+3, alexg...@gmail.com: >>>>> >>>>>> I have postgres. How would it look for that? >>>>>> >>>>>> On Saturday, November 14, 2020 at 9:03:13 AM UTC-8 valq...@gmail.com >>>>>> wrote: >>>>>> >>>>>>> Just in case : pydal doesnt support backend specific aggregate >>>>>>> functions >>>>>>> >>>>>>> >>>>>>> суббота, 14 ноября 2020 г. в 19:54:35 UTC+3, valq...@gmail.com: >>>>>>> >>>>>>>> There is no db.executesql >>>>>>>> >>>>>>>> суббота, 14 ноября 2020 г. в 19:51:52 UTC+3, alexg...@gmail.com: >>>>>>>> >>>>>>>>> sorry, did not mean direct SQL through db.executesql , meant >>>>>>>>> through DAL >>>>>>>>> >>>>>>>>> On Saturday, November 14, 2020 at 8:23:11 AM UTC-8 >>>>>>>>> valq...@gmail.com wrote: >>>>>>>>> >>>>>>>>>> Assuming sqlite: >>>>>>>>>> person_cnt = >>>>>>>>>> db.PERSON_PROJECT_PRIORITY.person_fk.count().with_alias('person_cnt') >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> prioritySet = db((db.PERSON.id <http://db.person.id/> == >>>>>>>>>> PERSON-PROJECT-PRIORITY.person_fk) & (PROJECT.id == >>>>>>>>>> PERSON-PROJECT-PRIORITY.project_fk)).select( >>>>>>>>>> ..., >>>>>>>>>> person_cnt, >>>>>>>>>> 'GROUP_CONCAT(person.person_name,",") AS person_list' >>>>>>>>>> groupby = db.PERSON-PROJECT-PRIORITY.project_fk, >>>>>>>>>> ) >>>>>>>>>> >>>>>>>>>> суббота, 14 ноября 2020 г. в 09:40:17 UTC+3, alexg...@gmail.com: >>>>>>>>>> >>>>>>>>>>> How to write a statement that counts which projects are the >>>>>>>>>>> priority of most people >>>>>>>>>>> >>>>>>>>>>> PROJECT >>>>>>>>>>> id >>>>>>>>>>> project_name >>>>>>>>>>> >>>>>>>>>>> PERSON >>>>>>>>>>> id >>>>>>>>>>> person_name >>>>>>>>>>> >>>>>>>>>>> PERSON_PROJECT_PRIORITY >>>>>>>>>>> person_fk >>>>>>>>>>> project_fk >>>>>>>>>>> >>>>>>>>>>> prioritySet = db((db.PERSON.id == >>>>>>>>>>> PERSON-PROJECT-PRIORITY.person_fk) & (PROJECT.id == >>>>>>>>>>> PERSON-PROJECT-PRIORITY.project_fk)).select() >>>>>>>>>>> >>>>>>>>>>> How to sort by count of projects which have priority in order of >>>>>>>>>>> the most persons' priority? >>>>>>>>>>> >>>>>>>>>>> Output looks like this: >>>>>>>>>>> >>>>>>>>>>> Paint-the-house (10) [Means is the top priority for 10 people] >>>>>>>>>>> Plant-a-garden (5) >>>>>>>>>>> Clean-out-garage (2) >>>>>>>>>>> >>>>>>>>>>> If you have additional time, how to write so output looks like: >>>>>>>>>>> >>>>>>>>>>> Paint-the-house (10) Tom, Sue, Tony, Ted, Mary, Fred, Sal, >>>>>>>>>>> Chris, Ed, Sally >>>>>>>>>>> Plant-a-garden (5) Harry, George, Joanne, Tony, Janet >>>>>>>>>>> Clean-out-garage (2) Clyde, Jane >>>>>>>>>>> >>>>>>>>>>> Thanks, >>>>>>>>>>> >>>>>>>>>>> Alex Glaros >>>>>>>>>>> >>>>>>>>>> -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/web2py/b1bc83f0-f737-4d01-96f5-d5192f496957n%40googlegroups.com.
