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  • mongodb 操作语句与sql操作语句对比

    上行:SQL 操作语句

    下行:Mongo 操作语句

    CREATE TABLE USERS (a Number, b Number)

    db.createCollection("mycoll")

    INSERT INTO USERS VALUES(1,1)

    db.users.insert({a:1,b:1})

    SELECT a,b FROM users

    db.users.find({}, {a:1,b:1})

    SELECT * FROM users

    db.users.find()

    SELECT * FROM users WHERE age=33

    db.users.find({age:33})

    SELECT a,b FROM users WHERE age=33

    db.users.find({age:33}, {a:1,b:1})

    SELECT * FROM users WHERE age=33 ORDER BY name

    db.users.find({age:33}).sort({name:1})

    SELECT * FROM users WHERE age>33

    db.users.find({'age':{$gt:33}})})

    SELECT * FROM users WHERE age<33

    db.users.find({'age':{$lt:33}})})

    SELECT * FROM users WHERE name LIKE "%Joe%"

    db.users.find({name:/Joe/})

    SELECT * FROM users WHERE name LIKE "Joe%"

    db.users.find({name:/^Joe/})

    SELECT * FROM users WHERE age>33 AND age<=40

    db.users.find({'age':{$gt:33,$lte:40}})})

    SELECT * FROM users ORDER BY name DESC

    db.users.find().sort({name:-1})

    SELECT * FROM users WHERE a=1 and b='q'

    db.users.find({a:1,b:'q'})

    SELECT * FROM users LIMIT 10 SKIP 20

    db.users.find().limit(10).skip(20)

    SELECT * FROM users WHERE a=1 or b=2

    db.users.find( { $or : [ { a : 1 } , { b : 2 } ] } )

    SELECT * FROM users LIMIT 1

    db.users.findOne()

    SELECT DISTINCT last_name FROM users

    db.users.distinct('last_name')

    SELECT COUNT(*y) FROM users

    db.users.count()

    SELECT COUNT(*y) FROM users where AGE > 30

    db.users.find({age: {'$gt': 30}}).count()

    SELECT COUNT(AGE) from users

    db.users.find({age: {'$exists': true}}).count()

    CREATE INDEX myindexname ON users(name)

    db.users.ensureIndex({name:1})

    CREATE INDEX myindexname ON users(name,ts DESC)

    db.users.ensureIndex({name:1,ts:-1})

    EXPLAIN SELECT * FROM users WHERE z=3

    db.users.find({z:3}).explain()

    UPDATE users SET a=1 WHERE b='q'

    db.users.update({b:'q'}, {$set:{a:1}}, false, true)

    UPDATE users SET a=a+2 WHERE b='q'

    db.users.update({b:'q'}, {$inc:{a:2}}, false, true)

    DELETE FROM users WHERE z="abc"

    db.users.remove({z:'abc'});

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  • 原文地址:https://www.cnblogs.com/thbbsky/p/3144179.html
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