Question

SQL语句如何实现从数据库表中查询随机数据的记录

Answer 1

数据库的随机查询SQL

1. Oracle,随机查询20条
select * from
(
select * from 表名
order by dbms_random.value
)
where rownum <= 20;

2.MS SQL Server，随机查询20条
select top 20 * from 表名order by newid()

3.My SQL:，随机查询20条
select * from 表名 order by rand() limit 20

Answer 2

oracle:
order by dbms_random.value()

sqlserver
ORDER BY NEWID()