SQLServer：select top 10 * from mytable;
Oracle: select * from mytable where rownum <=10;
Mysql:select * from mytable limit 0,10;
PostgreSQL:select * from mytable limit 0,10;(貌似跟Mysql一样的)
数据库查询前10条比较
原文：https://www.cnblogs.com/tiandi/p/12591666.html
