mongodb index multiple keys
The following example creates a single key descending index on the name field: ... also supports user-defined indexes on multiple fields, i.e. compound indexes. ,Compound indexes can support queries that match on multiple fields. ... For single-field indexes, the sort order of keys doesn't matter because MongoDB can ...
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 mongodb index multiple keys 相關參考資料
Multikey Indexes — MongoDB Manual
To index a field that holds an array value, MongoDB creates an index key for each element in the array. These multikey indexes support efficient queries against array fields. https://docs.mongodb.com Indexes — MongoDB Manual
The following example creates a single key descending index on the name field: ... also supports user-defined indexes on multiple fields, i.e. compound indexes. https://docs.mongodb.com Compound Indexes — MongoDB Manual - MongoDB Docs
Compound indexes can support queries that match on multiple fields. ... For single-field indexes, the sort order of keys doesn't matter because MongoDB can ... https://docs.mongodb.com [mongoDB]index功能的筆記@ 雷伊的工作心得:: 隨意窩Xuite日誌
在預設的情況下，_id欄位一開始就己經是index，同時_id也是primary key，如果一筆資料沒有指定_id的值，那麼系統會配給他一個12-byte的值（資料型態為ObjectID）。 https://blog.xuite.net Unique Indexes — MongoDB Manual
If you use the unique constraint on a compound index, then MongoDB will enforce uniqueness on the combination of the index key values. For example, to ... https://docs.mongodb.com Index Intersection — MongoDB Manual
MongoDB can use the intersection of multiple indexes to fulfill queries. ... that does not include the index prefix keys or that specifies a different sort order. https://docs.mongodb.com Indexing Strategies — MongoDB Manual
... to fulfill most queries. However, each clause of an $or query may use a different index, and in addition, MongoDB can use an intersection of multiple indexes. https://docs.mongodb.com when to index on multiple keys in mongodb - Stack Overflow
An index on price helps with queries on price . An index on qty helps with queries on qty . An index on price and qty helps with queries on price ... https://stackoverflow.com Multikey Index Bounds — MongoDB Manual - MongoDB Docs
Compounding bounds refers to using bounds for multiple keys of compound index. For instance, given a compound index a: 1, b: 1 } with bounds on field a of ... https://docs.mongodb.com MongoDB: why doesn't sorting by multiple keys use an index ...
It's worth having a read of the Indexing Strategies section of the Indexing Advice & FAQ wiki page. There are a few considerations that you may be missing:. https://stackoverflow.com |