邓宁-克鲁格效应(Dunning-Kruger effect)
搜索小工具:https://github.com/super-l/superl-url
自动搜索指定关键词指定页数的结果并存储到 MySQL上
SQL | MongoDB |
---|---|
Database | Database |
Table | Collection |
Index | Index |
Row | Document |
Column | Field |
Joins | Embed in document or link via DBRef |
CREATE TABLE employee (name VARCHAR(100)) | db.createCollection("employee") |
INSERT INTO employees VALUES (Alex, 36) | db.employees.insert({name: "Alex", age: 36}) |
SELECT * FROM employees | db.employees.find() |
SELECT * FROM employees LIMIT 1 | db.employees.findOne() |
SELECT DISTINCT name FROM employees | db.employees.distinct("name") |
UPDATE employees SET age = 37 WHERE name = 'Alex' | db.employees.update({name: "Alex"}, {$set: {age: 37}}, {multi: true}) |
DELETE FROM employees WHERE name = 'Alex' | db.employees.remove({name: "Alex"}) |
CREATE INDEX ON employees (name ASC) | db.employees.ensureIndex({name: 1}) |
官方PDF: http://s3.amazonaws.com/info-mongodb-com/sql_to_mongo.pdf
MySQL 转 Mongo: http://www.querymongo.com/
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