SQL查询表的第一条数据和最后一条数据

方法一: 使用TOP

SELECT TOP 1 * FROM user;
SELECT TOP 1 * FROM user order by id desc;

方法二: 使用LIMIT

SELECT * FROM user LIMIT 1;
SELECT * FROM user ORDER BY id ASC LIMIT 1;
SELECT * FROM user ORDER BY id DESC LIMIT 1;