create
INSERT INTO tasks(subject,start_date,end_date,description)
VALUES('Learn MySQL INSERT','2017-07-21','2017-07-22','Start learning..');
read 左右链接
SELECT
plugin_of_user.id, plugin_of_user.user_plugin_name,
plugin_info.name, plugin_info.avatar, plugin_info.link, plugin_info.type
FROM plugin_of_user
RIGHT JOIN plugin_info
ON plugin_of_user.plugin_id=plugin_info.id
WHERE plugin_of_user.user_id = ?
update
UPDATE [LOW_PRIORITY] [IGNORE] table_name
SET
column_name1 = expr1,
column_name2 = expr2,
...
WHERE
condition;
无则添加,有则修改
insert into student
(number, name)
values
(45,‘张三’)
ON DUPLICATE KEY UPDATE
number = 46, name = ‘李四’;
delete
DELETE FROM table_name
WHERE condition;