TSQL：A表字段与B表中的关联，关联条件中一列是随机关联的实现方式

A表字段与B表中的关联，关联条件中一列是随机关联的实现方式

 create table test(
 rsrp string,
 rsrq string,
 tkey string,
 distan string
 );

 insert into test values('-90.28','-37','tkey1','');
 insert into test values('-92.35','-40','tkey1','');
 insert into test values('-94.36','-34','tkey2','');
 insert into test values('-93.88','-38','tkey2','');

 select * from test;
 +------------+------------+------------+--------------+--+
 | test.rsrp  | test.rsrq  | test.tkey  | test.distan  |
 +------------+------------+------------+--------------+--+
 | -90.28     | -37        | tkey1      | 10           |
 | -92.35     | -40        | tkey1      | 30           |
 | -94.36     | -34        | tkey2      | 5            |
 | -93.88     | -38        | tkey2      | 19           |
 +------------+------------+------------+--------------+--+

 create table test_latlng
 (
 tkey string,
 lat string,
 lng string
 );
 insert into test_latlng values('tkey1','lat1','lng1');
 insert into test_latlng values('tkey1','lat2','lng2');
 insert into test_latlng values('tkey1','lat3','lng3');
 insert into test_latlng values('tkey1','lat4','lng4');
 insert into test_latlng values('tkey2','lat1','lng1');
 insert into test_latlng values('tkey2','lat2','lng2');
 insert into test_latlng values('tkey2','lat3','lng3');
 insert into test_latlng values('tkey2','lat4','lng4');

 0: jdbc:hive2://10.78.152.62:21066/> select * from test_latlng;
 +-------------------+------------------+------------------+--+
 | test_latlng.tkey  | test_latlng.lat  | test_latlng.lng  |
 +-------------------+------------------+------------------+--+
 | tkey1             | lat1             | lng1             |
 | tkey1             | lat2             | lng2             |
 | tkey1             | lat3             | lng3             |
 | tkey1             | lat4             | lng4             |
 | tkey2             | lat1             | lng1             |
 | tkey2             | lat2             | lng2             |
 | tkey2             | lat3             | lng3             |
 | tkey2             | lat4             | lng4             |
 +-------------------+------------------+------------------+--+

 select rsrp,rsrq,t10.tkey,lat,lng,t10.rn
 from
 (
 select rsrp,rsrq,tkey,row_number()over(partition by tkey order by cast(rand() * 100 as int) asc) as rn
 from test
 group by rsrp,rsrq,tkey
 ) t10
 inner join
 (
 select lat,lng,tkey,row_number()over(partition by tkey order by cast(rand() * 10000 as int) asc) as rn
 from test_latlng
 group by lat,lng,tkey
 ) t11
 on t10.tkey=t11.tkey and t10.rn=t11.rn;
 +---------+-------+-----------+-------+-------+---------+--+
 |  rsrp   | rsrq  | t10.tkey  |  lat  |  lng  | t10.rn  |
 +---------+-------+-----------+-------+-------+---------+--+
 | -90.28  | -37   | tkey1     | lat2  | lng2  | 1       |
 | -92.35  | -40   | tkey1     | lat3  | lng3  | 2       |
 | -93.88  | -38   | tkey2     | lat3  | lng3  | 1       |
 | -94.36  | -34   | tkey2     | lat2  | lng2  | 2       |
 +---------+-------+-----------+-------+-------+---------+--+