题解 | #对first_name创建唯一索引uniq_idx_firstname#
对first_name创建唯一索引uniq_idx_firstname
http://www.nowcoder.com/practice/e1824daa0c49404aa602cf0cb34bdd75
/*
ALTER table actor ADD unique uniq_idx_firstname(first_name);
注意：SQLite已经不支持ALTER TABLE创建索引功能！
*/
create UNIQUE index uniq_idx_firstname on actor(first_name);
create index idx_lastname on actor(last_name);
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