oracle分页和mysql分页

mysql分页用limit

select * from user where address = ‘唐山’ limit 10, 20

oracle分页用rownum

查询user表中前5条数据，注意不能使用等于号，不然查不出数据
简单分页

select * from user where rownum <= 5

当分页为取值范围时上面的就不行

select name, sex, age, phone, address
from (
	select name, sex, age, phone, address, rownum num
	from user
) b
where 
//开始页
b.num >= 20     
//结束页    
and b.num <= 30

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