Hive query using lookup table
1
I have 2 tables,
- Customer table with JSON Serde whih contains just one column
- other is a look-up table to locate customer level (1,2,3,4)
Customer Table
{
"Name": "John Doe",
"Info" : {
"Address": "111 Main Street",
"ID": 2222
}
}
Look-up table
has 2 columns, customer ID and level. For Example
ID Level
1111 1
1123 4
2234 1
How do I write a Hive query to identify all customers that are level 1 from my customer table?
Thanks
hadoop hive
edited Nov 14 '18 at 5:45
Gaurang Shah
3,20911334
asked Nov 13 '18 at 20:00
ChopstickChopstick
12
add a comment |
1
I have 2 tables,
- Customer table with JSON Serde whih contains just one column
- other is a look-up table to locate customer level (1,2,3,4)
Customer Table
{
"Name": "John Doe",
"Info" : {
"Address": "111 Main Street",
"ID": 2222
}
}
Look-up table
has 2 columns, customer ID and level. For Example
ID Level
1111 1
1123 4
2234 1
How do I write a Hive query to identify all customers that are level 1 from my customer table?
Thanks
hadoop hive
edited Nov 14 '18 at 5:45
Gaurang Shah
3,20911334
asked Nov 13 '18 at 20:00
ChopstickChopstick
12
what is stopping you from joining this two tables?
– Gaurang Shah
Nov 14 '18 at 5:45
add a comment |
1
1
1
I have 2 tables,
- Customer table with JSON Serde whih contains just one column
- other is a look-up table to locate customer level (1,2,3,4)
Customer Table
{
"Name": "John Doe",
"Info" : {
"Address": "111 Main Street",
"ID": 2222
}
}
Look-up table
has 2 columns, customer ID and level. For Example
ID Level
1111 1
1123 4
2234 1
How do I write a Hive query to identify all customers that are level 1 from my customer table?
Thanks
hadoop hive
edited Nov 14 '18 at 5:45
Gaurang Shah
3,20911334
asked Nov 13 '18 at 20:00
ChopstickChopstick
12
I have 2 tables,
- Customer table with JSON Serde whih contains just one column
- other is a look-up table to locate customer level (1,2,3,4)
Customer Table
{
"Name": "John Doe",
"Info" : {
"Address": "111 Main Street",
"ID": 2222
}
}
Look-up table
has 2 columns, customer ID and level. For Example
ID Level
1111 1
1123 4
2234 1
How do I write a Hive query to identify all customers that are level 1 from my customer table?
Thanks
hadoop hive
hadoop hive
edited Nov 14 '18 at 5:45
Gaurang Shah
3,20911334
asked Nov 13 '18 at 20:00
ChopstickChopstick
12
edited Nov 14 '18 at 5:45
Gaurang Shah
3,20911334
asked Nov 13 '18 at 20:00
ChopstickChopstick
12
edited Nov 14 '18 at 5:45
Gaurang Shah
3,20911334
edited Nov 14 '18 at 5:45
Gaurang Shah
3,20911334
edited Nov 14 '18 at 5:45
Gaurang Shah
3,20911334
3,20911334
asked Nov 13 '18 at 20:00
ChopstickChopstick
12
asked Nov 13 '18 at 20:00
ChopstickChopstick
12
asked Nov 13 '18 at 20:00
ChopstickChopstick
12
12
what is stopping you from joining this two tables?
– Gaurang Shah
Nov 14 '18 at 5:45
add a comment |
what is stopping you from joining this two tables?
– Gaurang Shah
Nov 14 '18 at 5:45
what is stopping you from joining this two tables?
– Gaurang Shah
Nov 14 '18 at 5:45
what is stopping you from joining this two tables?
– Gaurang Shah
Nov 14 '18 at 5:45
add a comment |
1 Answer
1
active
oldest
votes
0
Extract ID from JSON using get_json_object() and join with lookup table, add filtering.
Demo:
select s.cust_name, s.Address, s.ID, lkp.level
from
(select
get_json_object(json_col,'$.Info.ID') as ID,
get_json_object(json_col,'$.Name') as cust_name,
get_json_object(json_col,'$.Info.Address') as Address
from
( --replace this subquery with your table
select '{"Name": "John Doe","Info" : {"Address": "111 Main Street","ID": 2222}}' as json_col)s
) s
left join
( --replace this subquery with your table
select stack(4,
1111, 1,
1123, 4,
2234, 1,
2222, 3
) as (ID, Level)
)lkp on s.ID=lkp.ID
where lkp.Level !=1 --filter out level 1
or lkp.level is null --this is to allow records without corresponding level in lkp
;
Result:
OK
cust_name address id level
John Doe 111 Main Street 2222 3
Time taken: 31.469 seconds, Fetched: 1 row(s)
answered Nov 14 '18 at 8:30
leftjoinleftjoin
8,49922151
Thank you for the solution. How do I update your solution to remove all customer with customer level =1 from Customer Table?
– Chopstick
Nov 14 '18 at 15:12
@Chopstick Added filter in the query
– leftjoin
Nov 14 '18 at 17:02
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
Extract ID from JSON using get_json_object() and join with lookup table, add filtering.
Demo:
select s.cust_name, s.Address, s.ID, lkp.level
from
(select
get_json_object(json_col,'$.Info.ID') as ID,
get_json_object(json_col,'$.Name') as cust_name,
get_json_object(json_col,'$.Info.Address') as Address
from
( --replace this subquery with your table
select '{"Name": "John Doe","Info" : {"Address": "111 Main Street","ID": 2222}}' as json_col)s
) s
left join
( --replace this subquery with your table
select stack(4,
1111, 1,
1123, 4,
2234, 1,
2222, 3
) as (ID, Level)
)lkp on s.ID=lkp.ID
where lkp.Level !=1 --filter out level 1
or lkp.level is null --this is to allow records without corresponding level in lkp
;
Result:
OK
cust_name address id level
John Doe 111 Main Street 2222 3
Time taken: 31.469 seconds, Fetched: 1 row(s)
answered Nov 14 '18 at 8:30
leftjoinleftjoin
8,49922151
Thank you for the solution. How do I update your solution to remove all customer with customer level =1 from Customer Table?
– Chopstick
Nov 14 '18 at 15:12
@Chopstick Added filter in the query
– leftjoin
Nov 14 '18 at 17:02
add a comment |
0
Extract ID from JSON using get_json_object() and join with lookup table, add filtering.
Demo:
select s.cust_name, s.Address, s.ID, lkp.level
from
(select
get_json_object(json_col,'$.Info.ID') as ID,
get_json_object(json_col,'$.Name') as cust_name,
get_json_object(json_col,'$.Info.Address') as Address
from
( --replace this subquery with your table
select '{"Name": "John Doe","Info" : {"Address": "111 Main Street","ID": 2222}}' as json_col)s
) s
left join
( --replace this subquery with your table
select stack(4,
1111, 1,
1123, 4,
2234, 1,
2222, 3
) as (ID, Level)
)lkp on s.ID=lkp.ID
where lkp.Level !=1 --filter out level 1
or lkp.level is null --this is to allow records without corresponding level in lkp
;
Result:
OK
cust_name address id level
John Doe 111 Main Street 2222 3
Time taken: 31.469 seconds, Fetched: 1 row(s)
answered Nov 14 '18 at 8:30
leftjoinleftjoin
8,49922151
Thank you for the solution. How do I update your solution to remove all customer with customer level =1 from Customer Table?
– Chopstick
Nov 14 '18 at 15:12
@Chopstick Added filter in the query
– leftjoin
Nov 14 '18 at 17:02
add a comment |
0
0
0
Extract ID from JSON using get_json_object() and join with lookup table, add filtering.
Demo:
select s.cust_name, s.Address, s.ID, lkp.level
from
(select
get_json_object(json_col,'$.Info.ID') as ID,
get_json_object(json_col,'$.Name') as cust_name,
get_json_object(json_col,'$.Info.Address') as Address
from
( --replace this subquery with your table
select '{"Name": "John Doe","Info" : {"Address": "111 Main Street","ID": 2222}}' as json_col)s
) s
left join
( --replace this subquery with your table
select stack(4,
1111, 1,
1123, 4,
2234, 1,
2222, 3
) as (ID, Level)
)lkp on s.ID=lkp.ID
where lkp.Level !=1 --filter out level 1
or lkp.level is null --this is to allow records without corresponding level in lkp
;
Result:
OK
cust_name address id level
John Doe 111 Main Street 2222 3
Time taken: 31.469 seconds, Fetched: 1 row(s)
answered Nov 14 '18 at 8:30
leftjoinleftjoin
8,49922151
Extract ID from JSON using get_json_object() and join with lookup table, add filtering.
Demo:
select s.cust_name, s.Address, s.ID, lkp.level
from
(select
get_json_object(json_col,'$.Info.ID') as ID,
get_json_object(json_col,'$.Name') as cust_name,
get_json_object(json_col,'$.Info.Address') as Address
from
( --replace this subquery with your table
select '{"Name": "John Doe","Info" : {"Address": "111 Main Street","ID": 2222}}' as json_col)s
) s
left join
( --replace this subquery with your table
select stack(4,
1111, 1,
1123, 4,
2234, 1,
2222, 3
) as (ID, Level)
)lkp on s.ID=lkp.ID
where lkp.Level !=1 --filter out level 1
or lkp.level is null --this is to allow records without corresponding level in lkp
;
Result:
OK
cust_name address id level
John Doe 111 Main Street 2222 3
Time taken: 31.469 seconds, Fetched: 1 row(s)
answered Nov 14 '18 at 8:30
leftjoinleftjoin
8,49922151
edited Nov 14 '18 at 17:01
answered Nov 14 '18 at 8:30
leftjoinleftjoin
8,49922151
answered Nov 14 '18 at 8:30
leftjoinleftjoin
8,49922151
answered Nov 14 '18 at 8:30
leftjoinleftjoin
8,49922151
8,49922151
Thank you for the solution. How do I update your solution to remove all customer with customer level =1 from Customer Table?
– Chopstick
Nov 14 '18 at 15:12
@Chopstick Added filter in the query
– leftjoin
Nov 14 '18 at 17:02
add a comment |
Thank you for the solution. How do I update your solution to remove all customer with customer level =1 from Customer Table?
– Chopstick
Nov 14 '18 at 15:12
@Chopstick Added filter in the query
– leftjoin
Nov 14 '18 at 17:02
Thank you for the solution. How do I update your solution to remove all customer with customer level =1 from Customer Table?
– Chopstick
Nov 14 '18 at 15:12
Thank you for the solution. How do I update your solution to remove all customer with customer level =1 from Customer Table?
– Chopstick
Nov 14 '18 at 15:12
@Chopstick Added filter in the query
– leftjoin
Nov 14 '18 at 17:02
@Chopstick Added filter in the query
– leftjoin
Nov 14 '18 at 17:02
add a comment |
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what is stopping you from joining this two tables?
– Gaurang Shah
Nov 14 '18 at 5:45