|
接下来，将用一个详细的例子完成学习（建议学习者着重事先看下关系模型）：
主表是foods表，
创建临时表的时候，语法是：create temp/temporary table table_name( column_definitions [,constraints ] ) ;
接下来，输入的echo on、mode column、 header on、nullvalue NUll，表示：将在屏幕上打印SQL语句，以列表的形式显示表格，包含列名称，将nulls打印成NULL.。
在和sqlite3.exe相同的路径下建立test . txt文件，输入：
INSERT INTO episodes (season,name)VALUES (1,'xifan ');
INSERT INTO episodes (season,name)VALUES (2,'momo ');
INSERT INTO episodes (season,name)VALUES (3,'jituitui ');
INSERT INTO episodes (season,name)VALUES (4,'jibangbang');
INSERT INTO episodes (season,'jizhuazhua');
INSERT INTO episodes (season,"jiguanzi ");
--insert into food_types(id,name) values ( )
INSERT INTO food_types(id,'jizhuazhua');
INSERT INTO food_types(id,'xifan ');
INSERT INTO food_types(id,'momo ');
INSERT INTO food_types(id,'jituitui ');
INSERT INTO food_types(id,name)VALUES (5,'jibangbang');
INSERT INTO food_types(id,name)VALUES (6,'jiguanzi ');
--insert into foods(id,type_id,name)values()
INSERT INTO foods(type_id,'jizhuazhua');
INSERT INTO foods(type_id,'xifan ');
INSERT INTO foods(type_id,'momo ');
INSERT INTO foods(type_id,'jituitui ');
INSERT INTO foods(type_id,'jibangbang');
INSERT INTO foods(type_id,'jiguanzi ');
--insert into food_episodes(food_id,episodes_id)values()
INSERT INTO foods_episode(food_id,episode_id)VALUES ( 1,1);
INSERT INTO foods_episode(food_id,episode_id)VALUES ( 2,2);
INSERT INTO foods_episode(food_id,episode_id)VALUES ( 3,3);
INSERT INTO foods_episode(food_id,episode_id)VALUES ( 4,4);
INSERT INTO foods_episode(food_id,episode_id)VALUES ( 5,5);
INSERT INTO foods_episode(food_id,episode_id)VALUES ( 6,6);
然后在命令提示符框中进行如下操作（在命令提示框中键入.read test.txt）：
然后新建文件select . txt ，输入：
select * from foods_episode;
select * from episodes;
select * from food_tyes;
select * from foods;
其他的因为面积太大，就不发了。反正基本上一致，结果显示正确。也可以看见，id字段是自动增长的。
接下来：
select
修改表
增加一列：
修改表名：
注意的几点：字符常量尽量有单引号，关键字和标示符不区分大小写，但是字符常量的大小写是不一样的；注释用——连续连字符，c语言风格的注释一般是不允许的；SQLite在修改表的过程中，alter table 命令是有局限性的。 （编辑：李大同）
【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!
|
