从已经创建的表中选择特定的行来创建MySQL表？
要从已创建的表创建表，请使用CREATETABLEASSELECT语句。让我们首先创建一个表-
create table DemoTable1318 -> ( -> Id int, -> FirstName varchar(10), -> LastName varchar(10), -> Age int -> );
使用插入命令在表中插入一些记录-
insert into DemoTable1318 values(1,'Chris','Brown',21); insert into DemoTable1318 values(2,'David','Miller',24); insert into DemoTable1318 values(3,'Carol','Taylor',23);
使用select语句显示表中的所有记录-
select * from DemoTable1318;
输出结果
+------+-----------+----------+------+ | Id | FirstName | LastName | Age | +------+-----------+----------+------+ | 1 | Chris | Brown | 21 | | 2 | David | Miller | 24 | | 3 | Carol | Taylor | 23 | +------+-----------+----------+------+ 3 rows in set (0.00 sec)
以下是从已创建的表中选择特定行来创建表的查询-
create table DemoTable1319 -> as select *from DemoTable1318 -> where Age IN(21,23); Records: 2 Duplicates: 0 Warnings: 0
使用select语句显示表中的所有记录-
select * from DemoTable1319;
输出结果
+------+-----------+----------+------+ | Id | FirstName | LastName | Age | +------+-----------+----------+------+ | 1 | Chris | Brown | 21 | | 3 | Carol | Taylor | 23 | +------+-----------+----------+------+ 2 rows in set (0.00 sec)
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