====一括更新(update)====
----
<pre>
var bulk = db.h1.initializeUnorderedBulkOp();
bulk.find({}).update(
{"$set": { "_RaceId": { $concat: [ "$RaceId.Year", "-", "$RaceId.MonthDay", "-","$RaceId.JyoCD", "-","$RaceId.Kaiji", "-","$RaceId.Nichiji", "-","$RaceId.RaceNum" ] } } }
)
bulk.execute();
</pre>
====一括登録または更新(upsert)====
----