PostgreSQL数据库日常学习笔记7-逻辑与或

INSERT INTO "Students" VALUES (6, '黄飞鸿', NULL, '广东省佛山市', 2);
INSERT INTO "Students" VALUES (7, '黄帝', NULL, '陕西省延安市', 0);
INSERT INTO "Students" VALUES (8, '郭嘉', '0173-2-3', NULL, 2);

select * from public."Students";

#查询出生日期大于1999-1-1且学费大于与等于50数据
select * from public."Students" where "StudentBirthday">'1990-1-1' and "StudentSalary">=50;

#插入两条数据
INSERT INTO "public"."Students"("StudentID","StudentName","StudentBirthday","StudentAddress") VALUES(9,'杜甫','0712-1-1','河南省'),(10,'白居易','0772-1-1','河南省新郑市');

#练习逻辑与
SELECT * FROM "public"."Students" WHERE "StudentBirthday"<'1990-1-1' OR "StudentAddress"='河南省';