摘要:
create table action(userId VARCHAR(10),visitDate VARCHAR(10),visitCount int ); insert into action values('u01','2017/1/21',5),('u02','2017/1/23',6),(' 阅读全文
摘要:
create table score( uid VARCHAR(10), subject_id VARCHAR(10), score int) DROP TABLE scoreINSERT INTO score VALUES ('1001','01' ,88),('1001','02' ,98),( 阅读全文