CREATE DATABASE IF NOT EXISTS EdocodeDB2;CREATE TABLE EMPLOYEE ( Name varchar(255),);
INSERT INTO EMPLOYEE VALUES (1, 'Kosuke');INSERT INTO EMPLOYEE VALUES (3,
'neutral' && )ORDER BY datum DESC该表有三个指数index_status_mit_spam index_user 32 const 7800 Using where; Using filesort
possible_keys是MySQL可能想使用的索引,keys是MySQL实际使用的索引