经典sql50题,附答案,适合初学者练手!

进来了, 点个赞再走吧, 谢谢您了.web – 数据源 /* create database test50; use test50; create table Student(sid varchar(10),sname varchar(10),sage datetime,ssex nvarchar(10)); insert into Student values(‘01’ , ‘赵雷’ , ‘19

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