题解 | #对first_name
对first_name创建唯一索引uniq_idx_firstname
https://www.nowcoder.com/practice/e1824daa0c49404aa602cf0cb34bdd75
-- 创建一个唯一索引uniq_idx_firstname在actor表的first_name列上 CREATE UNIQUE INDEX uniq_idx_firstname ON actor (first_name); -- 创建一个普通索引idx_lastname在actor表的last_name列上 CREATE INDEX idx_lastname ON actor (last_name);
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