asp.net - SQL update attribute -

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i have table of milestones in primary key id_milestone , table tasks foreign key id_milestone. each task attribute completion in percentage. milestone have attribute of completion in percentage. need update completion of milestone @ 100 percent until have completed all tasks set 100 percent. have dropdownlist interval 10 percent , users update progress. sorry english.

create table milestone       (        id_milestone integer  not null ,             nazev_milniku varchar2 (30) ,            )  ;     create table milestone_complete       (        id_milestone integer  not null ,        completed integer         )  ;  create table tasks       (        id_tasks integer  not null ,        id_milestone integer  not null ,        name_task varchar2 (30) ,        )  ;   create table tasks_complete       (        id_task integer  not null ,        completed integer               )  ;

this calculate percentage of milestones using percentages of tasks.

update [milestones] set [percentage] = (select avg(pecentage) [tasks] [tasks].[id_milestone] = [milestones].[id])

if want set e.g. status flag [completed] can this:

update [milestones] set [completed] = (case when (select avg(pecentage) [tasks] [tasks].[id_milestone] = [milestones].[id]) = 100 1 else 0 end)

this guess want didn't comppletely show tables, structure, etc. hope helps.

edit

your table milestone need column percentage or want write result in other table milestone_complete? don't understand why have additional tables. guess have column percentage in milestone table. in case sql this:

update [milestone] set [percentage] = (select avg(pecentage)                      [tasks]                      [tasks].[id_milestone] = [milestone].[id_milestone])

if want write result in completed' column in themilestone_complete` table, this:

update [milestone_complete] set [percentage] = (select avg(pecentage)                      [tasks]                      [tasks].[id_milestone] = [milestone].[id_milestone]) [milestone_complete] join [milestone] on [milestone].[id_milestone] = [milestone_complete].[id_milestone]

or want insert result milestone_complete if tasks of milestone 100%? not know if have record in compelted table or need add on in case. assume have 1 , want set completed e.g. 1 (0 = not completed).

update [milestone_complete] set [completed] = 1 [milestone_complete] join [milestone] on [milestone].[id_milestone] = [milestone_complete].[id_milestone] (select avg(percentage)         [tasks]         [tasks].[id_milestone] = [milestone].[id_milestone])=100

i didn't test of it, not sure if works, not 100% approach need modify own needs. hope helps. next time ask question concentrate on clear, complete , understandable question, make easier.


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