openGauss每日一练第1天 | 1.1 openGauss创建表、插入记录、查询记录和删除表基本使用

课后作业

1.创建一个表products

create table products 
(product_id integer, 
product_name char(30), 
category char(20));

comment on column products.product_id is '产品编号';
comment on column products.product_name is '产品名';
comment on column products.category is '种类';

2.向表中插入数据，采用一次插入一条和多条记录的方式

insert into products (product_id, product_name, category)
values (1502, 'olympus camera', 'electrncs'),
(1601, 'lamaze', 'toys'),
(1700, 'wait interface', 'Books'),
(1666, 'harry potter', 'toys');

3.查询表中所有记录及记录数

select * from products;

4.查询表中所有category记录，并将查询结果按升序排序

select product_id,category from products order by category desc;

5.查询表中category为toys的记录

select * from products where category = 'toys';

6.删除表products

drop table products;

openGauss SQL学习参考资料