SQL Server Transact-SQL—— 更新数据

作者：李钦 本文为博主原创文章，未经博主允许不得转载。

本文链接： https://blog.csdn.net/weixin_42320142/article/details/102734746

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);

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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。

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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;

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