单选题:在score数据表中给math字段添加名称为math_score索引的语句中,正确的是( )。
在score数据表中给math字段添加名称为math_score索引的语句中,正确的是( )。
A.CREATE INDEX index_name ON score(math);
B.CREATE INDEX score ON score(math_score);
C.CREATE INDEX math_score ON studentnfo(math);
D.CREATE INDEX math_score ON score(math);
答案:D
A.CREATE INDEX index_name ON score(math);
B.CREATE INDEX score ON score(math_score);
C.CREATE INDEX math_score ON studentnfo(math);
D.CREATE INDEX math_score ON score(math);
答案:D