时间:2021-07-01 10:21:17 帮助过:25人阅读
MongoDB find() Statements
SELECT *
FROM users
db.users.find()
SELECT id,
user_id,
status
FROM users
db.users.find(
{ },
{ user_id:1,status:1 }
)
SELECT user_id,status
FROM users
db.users.find(
{ },
{ user_id:1,status:1,_id:0 }
)
SELECT *
FROM users
WHERE status="A"
db.users.find(
{ status:"A" }
)
SELECT user_id,status
FROM users
WHERE status="A"
db.users.find(
{ status:"A" },
{ user_id:1,status:1,_id:0 }
)
SELECT *
FROM users
WHERE status!="A"
db.users.find(
{ status: {$ne:"A" } }
)
SELECT *
FROM users
WHERE status="A"
AND age=50
db.users.find(
{ status:"A",
age:50 }
)
SELECT *
FROM users
WHERE status="A"
OR age=50
db.users.find(
{ $or: [ {status:"A" } ,
{ age:50 } ] }
)
SELECT *
FROM users
WHERE age>25
db.users.find(
{ age: {$gt:25 } }
)
SELECT *
FROM users
WHERE age<25
db.users.find(
{ age: {$lt:25 } }
)
SELECT *
FROM users
WHERE age>25
AND age<=50
db.users.find(
{ age: {$gt:25,$lte:50 } }
)
SELECT *
FROM users
WHERE user_id like "%bc%"
db.users.find( {user_id:/bc/ } )
SELECT *
FROM users
WHERE user_id like "bc%"
db.users.find( {user_id:/^bc/ } )
SELECT *
FROM users
WHERE status="A"
ORDER BY user_id ASC
db.users.find( {status:"A" } ).sort( {user_id:1 } )
SELECT *
FROM users
WHERE status="A"
ORDER BY user_id DESC
db.users.find( {status:"A" } ).sort( {user_id:-1 } )
SELECT COUNT(*)
FROM users
db.users.count()
or
db.users.find().count()
SELECT COUNT(user_id)
FROM users
db.users.count( {user_id: {$exists:true } } )
or
db.users.find( {user_id: {$exists:true } } ).count()
SELECT COUNT(*)
FROM users
WHERE age>30
db.users.count( {age: {$gt:30 } } )
or
db.users.find( {age: {$gt:30 } } ).count()
SELECT DISTINCT(status)
FROM users
db.users.distinct("status" )
SELECT *
FROM users
LIMIT 1
db.users.findOne()
or
db.users.find().limit(1)
SELECT *
FROM users
LIMIT 5
SKIP10
db.users.find().limit(5).skip(10)
EXPLAIN SELECT *
FROM users
WHERE status="A"
db.users.find( {status:"A" } ).explain()
SQL INSERT Statements |
MongoDB insert() Statements |
INSERT INTO users(user_id, age, status) VALUES ("bcd001", 45, "A") |
db.users.insert( {user_id:"bcd001",age:45,status:"A"} ) |
SQL Update Statements |
MongoDB update() Statements |
UPDATE users SET status="C" WHERE age>25 |
db.users.update( { age: { $gt:25 } }, { $set: { status:"C" } }, { multi:true } ) |
UPDATE users SET age=age+3 WHERE status="A" |
db.users.update( { status:"A" } , { $inc: { age:3 } }, { multi:true } ) |
SQL Delete Statements |
MongoDB remove() Statements |
DELETE FROM users WHERE status="D" |
db.users.remove( { status:"D" } ) |
DELETE FROM users |
db.users.remove({}) |
mongodb与SQL相应关系表
标签:条件 rac ack values stat tar 更新 xpl desc