A、年齡>=12and年齡<=46 B、年齡>=12OR<=46 C、年齡>=12OR年齡<=46 D、年齡>=12AND<=46
A、CREATE VIEW myview SELECT*FROM歌手WHERELIKE(“1”歌手號(hào)) B、CREATE VIEW myview ASSELECT*FROM歌手WHERELIKE(“1”歌手號(hào)) C、CREATE VIEW myview SELECT*FROM歌手WHERELEFT(歌手號(hào),1)=“1” D、CREATE VIEW myview ASSELECT*FROM歌手WHERELEFT(歌手號(hào),1)="1"
A.INNERJOIN B.LEFTJOIN C.RIGHTJOIN D.FULLJOIN