search

FS1360472174 / nosql-mongo

mongo knowledge
4 stars 4 forks source link

CRUD #19

Open FS1360472174 opened 7 years ago

FS1360472174 commented 7 years ago
  1. 查询某个field 的总数 db.command({ distinct: 'COLLECTION_NAME', key: 'FIELD_NAME' }
FS1360472174 commented 7 years ago

2.update 加上$set 才会指定列更新