Merge pull request #221588 from nayakshweta/patch-4

prmerger-automator[bot] · web-flow · commit e4a953d3dc1d · 2022-12-15T07:41:18.000Z
Update indexing.md
diff --git a/articles/cosmos-db/mongodb/indexing.md b/articles/cosmos-db/mongodb/indexing.md
@@ -229,7 +229,7 @@ globaldb:PRIMARY> db.coll.createIndex( { "student_id" : 1 }, {unique:true} )
 }
 ```
 
-For sharded collections, you must provide the shard (partition) key  to create a unique index. In other words, all unique indexes on a sharded collection are compound indexes where one of the fields is the partition key.
+For sharded collections, you must provide the shard (partition) key  to create a unique index. In other words, all unique indexes on a sharded collection are compound indexes where one of the fields is the shard key. The first field in the order should be the shard key.
 
 The following commands create a sharded collection ```coll``` (the shard key is ```university```) with a unique index on the fields `student_id` and `university`:
 

Original file line number	Diff line number	Diff line change
`@@ -229,7 +229,7 @@ globaldb:PRIMARY> db.coll.createIndex( { "student_id" : 1 }, {unique:true} )`
`229`	`229`	`}`
`230`	`230`	```
`231`	`231`
`232`		`-For sharded collections, you must provide the shard (partition) key to create a unique index. In other words, all unique indexes on a sharded collection are compound indexes where one of the fields is the partition key.`
	`232`	`+For sharded collections, you must provide the shard (partition) key to create a unique index. In other words, all unique indexes on a sharded collection are compound indexes where one of the fields is the shard key. The first field in the order should be the shard key.`
`233`	`233`
`234`	`234`	The following commands create a sharded collection ```coll``` (the shard key is ```university```) with a unique index on the fields `student_id` and `university`:
`235`	`235`