2022年2月26日
SQL之DML
摘要： INSERT INSERT INTO EMPLOYEES VALUES ('Smith', 'John', '1980-06-10', 'Los Angles', 16, 45000); DELETE DELETE FROM Person WHERE LastName = 'Rasmussen'; 阅读全文
posted @ 2022-02-26 10:11 hellozhangjz 阅读(30) 评论(0) 推荐(0)
SQL之QL
摘要： 从中文语法上来说，应该先写FROM语句比较好理解 基础查询语句 SELECT [DISTINCT] target-list FROM tables WHERE qualification GROUP BY grouping-list HAVING group-qualification DISTIN 阅读全文
posted @ 2022-02-26 10:01 hellozhangjz 阅读(150) 评论(0) 推荐(0)