# 全文索引 Shop 表的部分字段如下: ```mysql create table shop ( id int primary key auto_increment, description varchar(8000) -- ... ) ``` 现在 Joe 要给 description 字段加上全文索引,他应该怎么做? ## 答案 ```mysql alter table shop add fulltext(description); ``` ## 选项 ### A ```mysql alter table shop add index fulltext(description); ``` ### B ```mysql alter table shop create fulltext(description); ``` ### C ```mysql alter table shop alter description add fulltext(description); ```