README.md

MiniSQL

DataBase MiniSQL

编译环境

• c++17 以上
• GNU make

支持语法

• 创建表

  create table student (
    sid char(8) unique ,                     //char(n)       1 <= n <= 255
    sname char(20) ,
    sage int ,
    scome float ,
    primary key (sid)
  );
  // 最多32个属性

• 删除表

  drop table student;

• 创建索引

  create index stuname on student(sname);

• 删除索引

  drop index stuname on student;

• 选择语句

  select * from	student;
  select * from student where sid = '88888888';
  select * from student where sage > 20 and scome < 2000;
  
  // < > <= >= <> = 

• 插入语句

  insert into student values('88888888','xiaoming',20,2000.00);

• 删除语句

  delete from student;
  delete from student where sid = '88888888';

• 退出语句

  quit;

• 执行脚本

  execfile test.txt;

要求

• 返回查询时间、执行返回或影响的行数、错误信息

文件格式