I have sample Data
ID VAL LINK
12 5335.1 2
12 5336.1 2
12 5337.1 2
Initially I have tried Using GROUP_CONCAT on top of it applied Json_ARRAYAGG
Select JSON_OBJECT('VAL',VAL,'LINK',LINK)AS COL
from (
Select GROUP_CONCAT("",VAL,"")VAL,LINK from Table GROUP BY VAL,LINK ) T
I'm getting output like this :
[{"VAL": "5335.1,5336.1,5337.1", "LINK": 1}]
How can I convert this into Json Array :
Required Out Put
[{
"VAL":["5335.1","5336.1","5337.1"],
"LINK":1
}]
SELECT JSON_OBJECT('VAL', JSON_ARRAYAGG(VAL), 'LINK', LINK) output
FROM source_table
GROUP BY LINK
Related
Need help with json deserialization in postgresql. I would like this query
select data from panel
that returns:
Data
1 [{"type": "opened","user": "1"},{"type": "added","user":"2"}]
2 [{"type": "added","user": "3"}]
3 [{"type": "opened","user": "3"},{"type": "opened","user":"2"}]
instead returned a table:
type user
opened 1
added 2
added 3
opened 3
opened 2
I don't quite understand how to represent the empty space between [ and {. I would appreciate any guidance as I have not found this particular example
Use jsonb_array_elements to turn the arrays in to rows, then extract the keys:
select a.item ->> 'type' as type,
a.item ->> 'user' as "user"
from panel
cross join jsonb_array_elements(data) as a(item);
This assumes that data is defined with the data type jsonb (which it should be). If it's not, you have to cast it: data::jsonb
I am inserting my data in a database with json_encoded. Now I want to search in "feature", but the result is not exactly true.
MySQL query:
select *
from `modul_69`
where `extmod` like '%"68":%'
and `extmod` like '%"4"%'
and `extmod` not like '%"4":%'
Results:
row1 data:
{"68":["1","4","7"],"67":["14"],"75":["28"]} - true
row2 data:
{"68":["59"],"67":["1","11","13"],"75":["3","4","5","27"]} - false
I want select only row1 by key:68 and value:4
Please help
Here is one way to do it using MySQL JSON functions, available since version 5.7:
select *
from t
where json_search(js -> '$."68"', 'one', '4') is not null
What this does is get the array that correspond to outer key '68' (using ->, which is a syntactic sugar for json_extract()), and then search its content with json_search(); if a non-null value is returned, we have a match.
To find if the value '"4"' is contained in the member '"68"', you can first extract the array using JSON_EXTRACT() :
SELECT JSON_EXTRACT(m.extmod, '$."68"')
FROM modul_69 m;
This outputs
["1", "4", "7"]
["59"]
To search in a JSON array if it contains a specific value, you can use JSON_CONTAINS() :
SELECT JSON_CONTAINS('["1", "4", "7"]', '"4"', '$'); -- output is 1
SELECT JSON_CONTAINS('["59"]', '"4"', '$'); -- output is 0
Now you can combine both functions to get the rows that contains the expected value :
Schema (MySQL v5.7)
CREATE TABLE modul_69
(
extmod JSON
);
INSERT INTO modul_69 VALUES ('{"68":["1","4","7"],"67":["14"],"75":["28"]}'), ('{"68":["59"],"67":["1","11","13"],"75":["3","4","5","27"]}');
Query #1
SELECT *
FROM modul_69 m
WHERE JSON_CONTAINS(JSON_EXTRACT(m.extmod, '$."68"'),
'"4"',
'$') = 1;
Output
| extmod |
| --------------------------------------------------- |
| {"67": ["14"], "68": ["1", "4", "7"], "75": ["28"]} |
View on DB Fiddle
I am going to convert my current PostgreSQL database into a MongoDB version. For example, I have a table to record tweets, and another table to record multiple hashtags used by a specific tweet. What I wanna do is to use SQL to get a table like below and then export it as a .csv file so that I could import it to MongoDB.
Example:
2018-04-02 18:12:32 This plane has no outlet for me to charge my p... [{'tag': 'GucciGarden', 'airline': 'American A...
The problem that I met is that I can get a .csv file contains json array like "[{'tag': 'GucciGarden', 'airline': 'American A...", but it is a String type! And when I import it into MongoDB. The quote will be kept, which makes sth wrong.
And here is my SQL code:
SELECT tweets.tweet_id,tweets.text,
(SELECT array_to_json(array_agg(row_to_json(d)))
from (
SELECT tags.tag
FROM
tags
WHERE tags.tweet_id=tweets.tweet_id
) d
) as Tags
from tweets
Here is the result that I import into MongoDB:
{
"_id" : ObjectId("5ac59c272221ade1185ec241"),
"tweet_id" : 9.80869021435351e+17.0,
"created_at" : "2018-04-02 18:06:13",
"text" : "RT #MiraSorvino: Brad Myles shares #Delta that awareness is working- 9,000 #humantrafficking cases identified by #polarisproject National H��",
"screen_name" : "MMexville",
"favorite_count" : 0.0,
"retweet_count" : 40.0,
"source" : "the public",
"tags" : "[{'tag': 'humantrafficking', 'airline': 'Delta Air Lines'}]"}
this is because [{'tag': is not a valid json - you should have used double quotes and cast to json, eg:
let's say smth like your sample:
t=# create table c (i int, t text, j text);
CREATE TABLE
t=# insert into c values(1,'text',$$[{'tag': 'GucciGarden'}]$$);
INSERT 0 1
t=# select * from c;
i | t | j
---+------+--------------------------
1 | text | [{'tag': 'GucciGarden'}]
(1 row)
so then smth like your qry:
t=# select to_json(c) from (select i,t,replace(j,$$'$$,'"')::json j from c) c;
to_json
-------------------------------------------------
{"i":1,"t":"text","j":[{"tag": "GucciGarden"}]}
(1 row)
of course you will have positive false replacements of single quotes, eg 'tag': 'Gucci's Garden' will break the query logic, so you will have to make a more sophisticated replacement. probably with regular expressions to be neater.
I am trying to load the json file in hive.Below is sample json file.
{"Result":[
{"Col1":"Key1","Col2":"abc#gmail.com","Col3":"7"},
{"Col1":"Key2","Col2":"abc#gmail.com","Col3":"7"},
{"Col1":"Key3","Col2":"abc#gmail.com","Col3":"7"},
{"Col1":"Key4","Col2":"abc#gmail.com","Col3":"7"}
]}
I have tried below create statement in hive.
create table if not exists sample_json (A Array<struct<"Col1":String,"Col2":string,"Col3":string>>) ROW FORMAT SERDE 'org.openx.data.jsonserde.JsonSerDe' LOCATION '/a/b/c'
I am not able to retrieve the each columns data from table.I have tried to explode the array but it returns only 1st record .Can anyone please suggest what is wrong with it?
Create
CREATE EXTERNAL TABLE testJson (
Result ARRAY <struct<Col1:String ,
Col2 : string ,
Col3 : string > >)
ROW FORMAT SERDE 'org.openx.data.jsonserde.JsonSerDe'
LOCATION 's3n://temp_db.db/testjsonstring';
Query
SELECT
t.col1
,t.col2
,t.col3
FROM
testJson LATERAL VIEW explode (result) r AS t LIMIT 100
Result
Col1 Col2 Col3
Key1 abc#gmail.com 7
Key2 abc#gmail.com 7
Key3 abc#gmail.com 7
Key4 abc#gmail.com 7
I have scenario where i need to search multiple values in a JSON array. Below is my schema.
ID DATA
1 {"bookIds" : [1,2,3,5], "storeIds": [2,3]}
2 {"bookIds" : [1,2], "storeIds": [1,3]}
3 {"bookIds" : [11,12,10,9], "storeIds": [4,3]}
I want all the rows with value 1,2. Below is query i am using (This is query is written by one of fellow stackoverflow user Mr. klin credit to him).
select t.*
from JSONTest t, json_array_elements(data->'bookIds') books
where books::text::int in (1, 2);
However output I am duplicate rows in output, below is my output.
id data
1 {"bookIds" : [1,2,3,5], "storeIds": [2,3]}
1 {"bookIds" : [1,2,3,5], "storeIds": [2,3]}
2 {"bookIds" : [1,2], "storeIds": [1,3]}
2 {"bookIds" : [1,2], "storeIds": [1,3]}
I want only two rows in output that is id 1,2. How can i do that? I don't want use Distinct due to other constraints,
SQL Fiddle : http://sqlfiddle.com/#!15/6457a/2
Unfortunately there is no direct conversion function from a JSON array to a "real" Postgres array. (data ->'bookIds')::text returns something that is nearly a Postgres array literal: e.g. [1,2,3,5]. If you replace the [] with {} the value can be cast to an integer array. Once we have a proper integer array we can use the #> to test if it contains another array:
select *
from jsontest
where translate((data ->'bookIds')::text, '[]', '{}')::int[] #> array[1,2];
translate((data ->'bookIds')::text, '[]', '{}') will convert [1,2,3,5] to {1,2,3,5} which then is converted to an array using ::int[]
SQLFiddle: http://sqlfiddle.com/#!15/6457a/4