zno2

mongo find

MongoVUE

对应成语句,结构如下:

db.logs.find({ "message" : /消息/ }, { "message" : 1 }).limit(50).sort({ "timestamp" : -1 });

 

现有学生表(姓名,年龄,时间)

create table student
(
NAME VARCHAR2(100),
AGE NUMBER(2),
CREATETIME TIMESTAMP(6)
)

 

 

1. 检索全部

select * from student

db.student.find({ });

2. 检索某些字段(0:不存在,1:存在),存在模式下只显示指定的字段,不存在模式下不显示指定的字段

select name from student

db.student.find({ }, { "name" : 0 })

3.排序(-1:desc, 1:asc)

select * from student order by age desc 

db.student.find({ }).sort({ "age" : -1 });

4.值等

select * from student where name='小明'

db.student.find({ "name" : "小明" });

5.like

select * from student where name like '%旭%'

db.student.find({ "name" : /旭/ });

6.and

select * from student where name like '%旭%' and age =22

db.student.find({ "name":/旭/,"age":22});

7.or

select * from student where name like '%旭%' or age=22

db.student.find({ "$or" : [{ "name" : /旭/ }, { "age" : 22 }] });

8.<, <=, >, >= ($lt, $lte, $gt, $gte )

select * from student where age >=18 and age <=20

db.student.find({ "age" : { "$gte" : 18,"$lte" : 20 } });

9. 日期比较大小(Mongodb 中 Type 为 DateTime)

select * from student where createtime >= to_date('2015-06-01 10:10:10','YYYY-MM-DD HH24:MI:SS')

db.student.find({"createtime":{"$gte":ISODate("2015-06-01T10:10:10Z")}});

10.limit

select * from student limit 1

db.student.find({}).limit(1)

11. 不区分大小写检索

mysql 默认不区分大小写,可通过 binary(your_field_which_you_want_match_case) = 'your_value'

db.student.find({"your_field_case_sensitive":{"$regex":"your_keyword_no_need_to_match_case","$options":"i"}})

 

ps:中国+8 时区,mongodb 0 时区 (db)

     查询时要以0时区为准(+8时间-8小时)

posted on 2016-08-05 17:56  zno2  阅读(201)  评论(0编辑  收藏  举报

导航