MongoDB更新操作(Shell)

0、数据准备

for(var i=0;i<10000;i++){
var patid="pat"+i;
var patname="name"+i;
var sex="M";
var age=parseInt(100*Math.random(i));
db.patient.insert({"patid":patid,"patname":patname,"sex":sex,"age":age,address:{"city":"shanghai","street":"huaihai road"}});
}

1、默认为全局更新

db.patient.find({"patid":"pat100"})
db.patient.update({"patid":"pat100"},{"patid":"pat100","sex":"F"})
db.patient.find({"patid":"pat100"})

2、局部更新$set

db.patient.find({"patid":"pat101"})
db.patient.update({"patid":"pat101"},{$set:{"sex":"F"}})
db.patient.find({"patid":"pat101"})

3、局部更新$inc

db.patient.find({"patid":"pat102"})
db.patient.update({"patid":"pat102"},{$inc:{"age":-100}})
db.patient.find({"patid":"pat102"})

4、批量更新

db.patient.find({"age":10})
db.patient.update({"age":10},{$set:{"age":11}})
db.patient.find({"age":10})
db.patient.update({"age":10},{$set:{"age":11}},false,true)
db.patient.find({"age":10})

5、更新时,没有匹配则插入

db.patient.find({"patid":"pidx001"})
db.patient.update({"patid":"pidx001"},{"patid":"pidx001","sex":"F"},true)
db.patient.find({"patid":"pidx001"})

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