插入数据——INSERT
INSERT [INTO] table_name [column_list]
VALUES (value_list);
插入单行数据
1.为所有字段插入
INSERT INTO person(id,name,age,info)
VALUES(1,'Green',21,'Lawyer');
2.为指定字段
INSERT INTO person (id,name,info) VALUES (4,'Willam','sports man');
INSERT INTO person (id,name) VALUES (4,'Laura');
插入多行数据
INSERT [INTO] table_name [column_list]
VALUES (value_list);
INSERT [INTO] table_name [column_list]
VALUES (value_list1);
修改数据——UPDATE
UPDATE table_name
SET column_name1 = value1,column_name2 = value2,column_nameN = valueN
WHERE search_condition
修改单行数据
UPDATE person SET age = 15, name = 'LiMing' WHERE id = 10;
修改多行数据
UPDATE person SET info = 'student' WHERE age BETWEEN 10 AND 20; #不加where则修改整个字段内容。
删除数据——DELETE
DELECT FROM table_name
[WHERE <condition>]
删除部分数据
DELETE FROM person WHERE age = 22;
删除表中所有数据
DELETE FROM person;