mysql技术内幕_学习笔记_20130206

SELECT NOW();

SELECT NOW() \g

CREATE DATABASE sampdb;

use sampdb;

CREATE TABLE president
(
last_name  VARCHAR(15) NOT NULL,
first_name VARCHAR(15) NOT NULL,
suffix     VARCHAR(5)  NULL,
city       VARCHAR(20) NOT NULL,
state      VARCHAR(2)  NOT NULL,
birth      DATE        NOT NULL,
death      DATE        NULL
);

mysql sampdb < insert_president.sql

select * from president;

select birth from president where last_name = 'Eisenhower';

select * from score where event_id in (select event_id from grade_event where category = 'T');

select * from score where event_id = (select event_id from grade_event
where date = '2008-09-23' and category = 'Q');

select * from president where birth = (select min(birth) from president);

select last_name, first_name, city, state from president
where (city, state) =
(select city, state from president
where last_name = 'Adams' and first_name = 'John');

select * from student where student_id in (select student_id from absence);

show variables like 'datadir';