SQL语句中修改表结构的命令是______。
A、MODIFY TABLE B、MODIFY STRUCTURE C、ALTER TABLE D、ALTER STRUCTURE
A.select*fromt_studentorderbyscorelimit100
B.select*fromt_studentorderbyscore
C.selectname,scoreaspfromt_studentorderbyplimit100
D.selectname,scoreassfromt_studentorderbyscorelimit100