【MonogDB】The description of index(三) Compose and unique Index
2014-10-21 00:37
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This blog will go on talking about the index. In this blog the compose and unique Index will be mentioned.
2.3 Compose Index
2.4 unique Index
Attention: If a field is set to unique index, this field will be set null when inserting the data into database if this field is lost.
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