entity framework - ef-core - bool index vs historical table -


i´m using aspnet-core, ef-core sql server. have 'order' entity. i'm expecting orders table large , frequent query active orders customer (active orders tiny fraction of whole table) optimize speed of query can decide 2 approaches:

1) don't know if possible haven't done before, thinking creating boolean column named 'isactive' , make index when querying active orders faster.

2) when order becomes not active, move order table, i.e historicalorders, keeping orders table small.

which of 2 have better results?, or none of solution , third approach suggested?

before think new table historicalorders,just create column name isactive , test data.you don't need make index column.b'cos indexes eat storage , slows down writes , updates.so must careful when create index.when query data shown below.on below query data selection (or filter) done on sql srever side (iqueryable).so fast.

note : use asnotracking() too.it boost perfromnace too.

var activeorders =_context.set<orders>().where(o => o.isactive == true).asnotracking() .tolist();

reference : asnotracking()


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