摘要: DATABASE TEST5 5-1 CREATE TABLE test5_01 ( First_name varchar(4), frequency numeric(4)) INSERT INTO test5_01(First_name) SELECT DISTINCT SUBSTR(name,2 阅读全文
posted @ 2021-10-17 17:05 sora_013 阅读(74) 评论(0) 推荐(0) 编辑