wuli13141516的博客

https://www.runoob.com/sql/sql-insert-into-select.html建表语句：CREATE TABLEtable_name(column_name1 varchar(size) not null primary key,column_name2 int(size) DEFAULT '999',column_name3 date DE...

https://blog.youkuaiyun.com/a19881029/article/details/8961053https://blog.youkuaiyun.com/u010999809/article/details/82911918创建sequence：create sequence seq_test minvalue 1 maxvalue 21 start with 1 ...