MySQL8.0 OCP最新版1Z0-908认证考试题库整理-003

原题

Choose the best answer.

Examine this statement, which executes successfully:

You want to improve the performance of this query:

SELECT Name

FROM world.city

WHERE Population BETWEEN 1000000 AND 2000000;

Which change enables the query to succeed while accessing fewer rows?

A) ALTER TABLE world.city ADD INDEX (Name) ;

B) ALTER TABLE world.city ADD SPATIAL INDEX (Name) ;

C) ALTER TABLE world.city ADD FULLTEXT INDEX (Name) ;

D) ALTER TABLE world.city ADD FULLTEXT INDEX (Population) ;

E) ALTER TABLE world.city ADD SPATIAL INDEX (Population) ;

F) ALTER TABLE world.city ADD INDEX (Population) ;

 

解析

Answer：F

分析：

mysql> ALTER TABLE city ADD SPATIAL INDEX(Population);

ERROR 1687 (42000): A SPATIAL index may only contain a geometrical type column