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fm's Introduction

基础环境

npm install

开发

npm run dev
npm run service
npm run mongo

mongo

1、显示数据库 show dbs 2、切换到FM use fm 3、查看当前数据库中的集合(类似关系数据库中的表) show collections 4、查看当前数据库的用户信息 show users 5、查看当前所在的库 db 6、查看集合中数据 db..find().pretty() 7、创建集合 db.createCollection('') db.createCollection('collName', {size:20, capped:5, max:100}); 判断集合是否为定容量db.collName.isCapped(); 8、得到当前db的所有聚集集合 db.getCollectionNames(); 9、得到指定名称的聚集集合(table) db.getCollection("account");

Collection聚集集合

1、创建一个聚集集合(table) db.createCollection(“collName”, {size: 20, capped: 5, max: 100});
//创建成功会显示{“ok”:1} //判断集合是否为定容量db.collName.isCapped();

2、得到指定名称的聚集集合(table) db.getCollection("account");

3、得到当前db的所有聚集集合 db.getCollectionNames();

4、显示当前db所有聚集索引的状态 db.printCollectionStats();

5、查询文档 db.collection_name.find().pretty()

用户相关

1、添加一个用户 db.addUser("name");
db.addUser("userName", "pwd123", true);
添加用户、设置密码、是否只读

2、数据库认证、安全模式 db.auth("userName", "123123");

3、显示当前所有用户 show users;

4、删除用户 db.removeUser("userName");

聚集集合查询

1、查询所有记录 db.userInfo.find();
相当于:select * from userInfo;

默认每页显示20条记录,当显示不下的情况下,可以用it迭代命令查询下一页数据。注意:键入it命令不能带“;” 但是你可以设置每页显示数据的大小,用DBQuery.shellBatchSize= 50;这样每页就显示50条记录了。

2、查询去掉后的当前聚集集合中的某列的重复数据 db.userInfo.distinct("name");
会过滤掉name中的相同数据 相当于:select distict name from userInfo;

3、查询age = 22的记录 db.userInfo.find({"age": 22});
相当于: select * from userInfo where age = 22;

4、查询age > 22的记录 db.userInfo.find({age: {$gt: 22}});
相当于:select * from userInfo where age >22;

5、查询age < 22的记录 db.userInfo.find({age: {$lt: 22}});
相当于:select * from userInfo where age <22;

6、查询age >= 25的记录 db.userInfo.find({age: {$gte: 25}});
相当于:select * from userInfo where age >= 25;

7、查询age <= 25的记录 db.userInfo.find({age: {$lte: 25}});

8、查询age >= 23 并且 age <= 26 db.userInfo.find({age: {$gte: 23, $lte: 26}});

9、查询name中包含 mongo的数据 db.userInfo.find({name: /mongo/});
//相当于%% select * from userInfo where name like ‘%mongo%';

10、查询name中以mongo开头的 db.userInfo.find({name: /^mongo/});
相当于:select * from userInfo where name like ‘mongo%';

11、查询指定列name、age数据 db.userInfo.find({}, {name: 1, age: 1});
相当于:select name, age from userInfo; 当然name也可以用true或false,当用ture的情况下河name:1效果一样,如果用false就是排除name,显示name以外的列信息。

12、查询指定列name、age数据, age > 25 db.userInfo.find({age: {$gt: 25}}, {name: 1, age: 1});
相当于:select name, age from userInfo where age >25;

13、按照年龄排序 升序:db.userInfo.find().sort({age: 1});
降序:db.userInfo.find().sort({age: -1});

14、查询name = zhangsan, age = 22的数据 db.userInfo.find({name: 'zhangsan', age: 22});
相当于:select * from userInfo where name = ‘zhangsan' and age = ‘22';

15、查询前5条数据 db.userInfo.find().limit(5);
相当于:selecttop 5 * from userInfo;

16、查询10条以后的数据 db.userInfo.find().skip(10);
相当于:select * from userInfo where id not in ( selecttop 10 * from userInfo );

17、查询在5-10之间的数据 db.userInfo.find().limit(10).skip(5);
可用于分页,limit是pageSize,skip是第几页*pageSize

18、or与查询 db.userInfo.find({$or: [{age: 22}, {age: 25}]});
相当于:select * from userInfo where age = 22 or age = 25;

19、查询第一条数据 db.userInfo.findOne();
相当于:selecttop 1 * from userInfo; db.userInfo.find().limit(1);

20、查询某个结果集的记录条数 db.userInfo.find({age: {$gte: 25}}).count();
相当于:select count(*) from userInfo where age >= 20;

21、按照某列进行排序 db.userInfo.find({sex: {$exists: true}}).count();
相当于:select count(sex) from userInfo;

索引

1、创建索引 db.userInfo.ensureIndex({name: 1});
db.userInfo.ensureIndex({name: 1, ts: -1});

2、查询当前聚集集合所有索引 db.userInfo.getIndexes();

3、查看总索引记录大小 db.userInfo.totalIndexSize();

4、读取当前集合的所有index信息 db.users.reIndex();

5、删除指定索引 db.users.dropIndex("name_1");

6、删除所有索引索引 db.users.dropIndexes();

修改、添加、删除集合数据

1、添加 db.users.save({name: ‘zhangsan', age: 25, sex: true});
添加的数据的数据列,没有固定,根据添加的数据为准

2、修改 db.users.update({age: 25}, {$set: {name: 'changeName'}}, false, true);
相当于:update users set name = ‘changeName' where age = 25;
db.users.update({name: 'Lisi'}, {$inc: {age: 50}}, false, true);
相当于:update users set age = age + 50 where name = ‘Lisi';
db.users.update({name: 'Lisi'}, {$inc: {age: 50}, $set: {name: 'hoho'}}, false, true);
相当于:update users set age = age + 50, name = ‘hoho' where name = ‘Lisi';

3、删除 db.users.remove({age: 132});

4、查询修改删除 db.users.findAndModify({
query: {age: {$gte: 25}},
sort: {age: -1},
update: {$set: {name: 'a2'}, $inc: {age: 2}},
remove: true
});
db.runCommand({ findandmodify : "users",
query: {age: {$gte: 25}},
sort: {age: -1},
update: {$set: {name: 'a2'}, $inc: {age: 2}},
remove: true
});

update 或 remove 其中一个是必须的参数; 其他参数可选。 参数 详解 默认值 query 查询过滤条件 {} sort 如果多个文档符合查询过滤条件,将以该参数指定的排列方式选择出排在首位的对象,该对象将被操作 {} remove 若为true,被选中对象将在返回前被删除 N/A update 一个修改器对象 N/A new 若为true,将返回修改后的对象而不是原始对象。在删除操作中,该参数被忽略。 false fields 参见Retrieving a Subset of Fields (1.5.0+) All fields upsert 创建新对象若查询结果为空。 示例 (1.5.4+) false

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