Mongodb常用命令集合

分手后的思念是犯贱 2022-06-06 07:30 236阅读 0赞

＃启动mongod db 服务  
mongod --config /usr/local/etc/mongod.conf &  
  
  
\#正式环境启动 mongo db 服务  
mongod --bind\_ip=127.0.0.1 --auth --config /usr/local/etc/mongod.conf &  
  
  
\#mongo db 创建超级管理员  
db.createUser(  
  \{  
    user: "fafa",  
    pwd: "abc123",  
    roles: \[ \{ role: "userAdminAnyDatabase", db: "admin" \} \]  
  \}  
)  
  
  
mongo --port 27017 -u "fafa" -p "abc123" --authenticationDatabase "admin"  
  
  
\#mongodb创建普通管理员-某个db  
db.createUser(  
  \{  
    user: "tester",  
    pwd: "xyz123",  
    roles: \[ \{ role: "readWrite", db: "test" \},  
             \{ role: "read", db: "reporting" \} \]  
  \}  
)  
  
  
\#链接mongo db 数据库  
mongo --port 27017 -u "tester" -p "xyz123"  --authenticationDatabase "test"  
  
  
\#mongodb 创建集合  
db.createCollection(name, options)  
  
  
\#mongo db常用查询语句  
db.myCollection.find()  
db.myCollection.find().pretty()  
db.myCollection.findOne()  
  
  
\#mongodb 分页查询  
db.COLLECTION\_NAME.find().limit(NUMBER).skip(NUMBER)  
  
  
\#mongodb aggregate 联表查询  
\#$lookup 联表查询，  
\#$match  过滤查询条件  
\#$unwind 变成独立数据  
db.product.aggregate(\[  
\{  
$lookup:  
\{  
   from:"orders",  
   localField:"\_id",  
   foreignField:"pid",  
   as:"inventory\_docs"  
\},  
\},  
\{ $match : \{ price : \{$gt:20\} \} \},  
\{ $unwind:"$inventory\_docs" \},  
\{ $project: \{inventory\_docs:1,\_id:0\}\}  
\])  
  
  
\#mongodb 多联表查询(涉及3个表)  
db.product.aggregate(\[  
\{  
$lookup:  
\{  
   from:"orders",  
   localField:"\_id",  
   foreignField:"pid",  
   as:"inventory\_docs"  
\}  
\},  
\{  
$lookup:  
\{  
   from:"comments",  
   localField:"\_id",  
   foreignField:"pid",  
   as:"comments\_docs"  
\}  
\},  
\{ $match : \{ price : \{$gt:20\} \} \},  
\{ $unwind:"$comments\_docs" \}  
\])  
\#mongodb 联表查询，设置查询的字段  
db.product.aggregate(\[  
\{  
$lookup:  
\{  
   from:"orders",  
   localField:"\_id",  
   foreignField:"pid",  
   as:"inventory\_docs"  
\},  
\},  
\{ $match : \{ price : \{$gt:20\} \} \},  
\{ $project: \{inventory\_docs:1,\_id:0\}\}  
\])  
  
  
db.product.aggregate(\[  
\{  
$lookup:  
\{  
   from:"orders",  
   localField:"\_id",  
   foreignField:"pid",  
   as:"inventory\_docs"  
\},  
\},  
\{ $match : \{ price : \{$gt:20\} \} \},  
\])  
  
  
$ops = array(  
    array(  
        '$lookup' => array(  
            "from" => "orders",  
            "localField"   => "\_id",  
            "foreignField" => "pid",  
    "as"=>"inventory\_docs"  
        )  
    ),  
    array('$match' => array('price'=>array('$gt'=>20))),  
    array(  
        '$project' => array(  
            "inventory\_docs" => 1,  
            "\_id" =>0,  
        ),  
    ),  
);  
  
  
  
  
  
  
 \#mongodb 使用关联表里字段进行条件过滤，注意 $match要放在 $unwind后面  
 db.product.aggregate(\[  
\{  
 $lookup:  
 \{  
     from:"orders",  
     localField:"\_id",  
     foreignField:"pid",  
     as:"inventory\_docs"  
 \}  
 \},  
 \{ $match : \{"inventory\_docs.ordername":"订单4"\} \},  
 \])  
  
  
\#mongodb 导出  
./mongoexport -d my\_mongodb -c user -o user.dat  
  
  
mongodump -h 127.0.0.1 -u fafa -p --db test -out ./test.json