当前位置:网站首页>SparkSQL的UDF及分析案例,220725,
SparkSQL的UDF及分析案例,220725,
2022-07-26 10:50:00 【啊六六六】


![]()
mysql5和8,类名不一样,,,

Metastore提供元数据接口,为外部计算引擎提供,,共享,,


笛卡尔积
DSL:DataFrame

spark临时数仓,,



数据解密,定制化操作,,


有配置metastore,先启动meta,再启动hive,,
就是之前没见过直接启动hiveserver2的情况 不一定会用Metastore,用于共享,,

"null" , None
总共13位,以毫秒为单位,,
from_unixtime
unix_timestamp

DataFrame
每xxx,需要分组,,,

sum() over(partition by 省份)
或省份、订单个数
加orderby,到当前行,,


一定是先开启ThriftServer





review,,


有时间把回顾2看完::::

边栏推荐
- Flutter编译报错 version of NDK matched the requested version 21.0.6113669. Versions available locally: 2
- toolstrip 去边框
- Bigdecimal的加减乘除、比较大小、向上向下取整 和 Bigdecimal的集合累加、判断BigDecimal是否有小数
- The problem of formatting IAR sprintf floating point to 0.0 in UCOS assembly
- px2rem-loader将px转化为rem,适配移动端vant-UI等框架
- Newbie sees the source code arraydeque
- list升序和降序
- Fragment 懒加载
- MySQL quick learning notes-2021-08-31
- Sword finger offer (8): jump the steps
猜你喜欢

Wireshark basic tutorial Ethernet frame analysis.

pytest conftest.py和fixture的配合使用

0x00007FFD977C04A8 (Qt5Sqld.dll)处(位于 a.exe 中)引发的异常: 0xC0000005: 读取位置 0x0000000000000010 时发生访问冲突

看源码之LinkedList

Disable usbjatg in Altium Designer

20210807 1 c language program structure

RT thread learning notes (V) -- edit, download and debug programs

如何组装一个注册中心?

RT thread learning notes (VI) -- start the elmfat file system based on SPI flash (Part 1)

nmap弱点扫描结果可视化转换
随机推荐
RT thread learning notes (VIII) -- start the elmfat file system based on SPI flash (Part 2)
【小程序】onReachBottom 事件为什么不能触发 ?(一秒搞定)
Sword finger offer (49): convert a string to an integer
MFC多线程的简单使用
Stringing of macro parameters and connection of macro parameters in C language
RT thread learning notes (III) -- building a compilation environment with scons
13 managing resources by objects
232.用栈实现队列
Visual conversion of nmap vulnerability scanning results
如何组装一个注册中心?
@Notblank, @notnull, @notempty differences and uses
11 handle "self assignment" in operator=
Pengge C language 20210811 program structure operation
@JsonFormat和@DateTimeFormat的区别和使用
PLC与伺服电机连接
10 let operator= return a reference to *this
企鹅龙(DRBL)无盘启动+再生龙(clonezilla)网络备份与还原系统
Bash shell学习笔记(七)
0x00007ffd977c04a8 (qt5sqld.dll) (in a.exe): 0xc0000005: an access violation occurred when reading position 0x0000000000000010
Why do I need automated testing? Software testers take you to evaluate different software testing tools