select.txt

数据库模拟程序 实现控制台命令词法分析

SELECT * FROM T;
SELECT T.A,T.B FROM T;
SELECT T.A,Tb.A FROM T,Tb;
SELECT * FROM T WHERE C='GG' AND B=44 AND A='A';
SELECT T.B FROM T WHERE C='GG' AND B=44;
SELECT T.A FROM T WHERE C='GG' AND B=44 AND A='A';