MongoDB常用SQL

netstat -nltp | grep 27017    #查看MongoDB端口
./mongodb-start start    # 启动
./mongodb-stop stop    #停止
./mongo 127.0.0.1:27017    # 禁止auth后登陆MongoDB
>show dbs;    #显示数据库
>db;    # 显示当前数据库
>use admin;    # 转到数据库admin
>db.auth('root','123456');     # 以用户名密码登录数据库

db.dis_specimen.remove({"barCode" : "201712212200"}) # 删除

db.par_func.find().count(); # 统计表par_func记录数

function updateDelayDate() {
	var details = db.dis_specimen_detail.find({
		"delayDate":{$ne:""}
	});
	//var flag = false;
	while (details.hasNext()) {
		var detail = details.next();
		var date = detail.delayDate;
		var id = detail._id;
		if (date.length == 10) {

			var newDate = date + " 00:00:00";
			db.dis_specimen_detail.updateOne({
				"_id" : id
			}, {
				$set : {
					"delayDate" : newDate
				}
			});
			print("_id:"+id+",updated delayDate to "+newDate);
		}
		//flag = true;
	}
	//return flag;
};

updateDelayDate();

// 更新表par_customer中name以yi开头的记录，把active字段值更新为0
db.getCollection('par_customer').find({"name":/^yi/}).forEach(function(item){
db.getCollection('par_customer').update({"_id":item._id},{$set:{"active": "0"}})
})

// 更新表test_item_price中"standardPrice":null的数据为66
db.test_item_price.find({"standardPrice":null}).forEach(
function(item){
db.test_item_price.update({"_id" : item._id},{"$set":{"standardPrice":66}},false,true)
}
)