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‘});