求高手解决几个简单的数据库问题
初学数据库,谁能告诉我这是要干嘛啊,要具体说明,分步骤。。不是英文看不懂,就是不太清楚建完表之后然后干嘛,尤其是那个输入数据什么意思啊,怎么搞。。实验步骤1)create...
初学数据库,谁能告诉我这是要干嘛啊,要具体说明,分步骤。。不是英文看不懂,就是不太清楚建完表之后然后干嘛,尤其是那个输入数据什么意思啊,怎么搞。。
实验步骤
1)create the college database and tables
2) Set integrity constrains and index of all the above tables.
3) Input data into the tables
4) Solve the following queries (which refer to the college database) in SQL.
(1) Find all students’ names of students who took cs210 and cs240.
(2) Find all students’ names of students who took cs210 but never took cs110.
(3) Find all pairs of student numbers such that both students studied with the same instructor. 展开
实验步骤
1)create the college database and tables
2) Set integrity constrains and index of all the above tables.
3) Input data into the tables
4) Solve the following queries (which refer to the college database) in SQL.
(1) Find all students’ names of students who took cs210 and cs240.
(2) Find all students’ names of students who took cs210 but never took cs110.
(3) Find all pairs of student numbers such that both students studied with the same instructor. 展开
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