i'm create a table have one json column and data of inserted has below structure:
{
"options" : {
"info" : [
{"data" : "data1", "verified" : 0},
{"data" : "data2", "verified" : 1},
... and more
],
"otherkeys" : "some data..."
}
}
i want to run a query to get data of verified = 1 "info"
this is for mysql 5.7 comunity running on windows 10
select id, (meta->"$.options.info[*].data") AS `data`
from tbl
WHERE meta->"$.options.info[*].verified" = 1
is expect the output of "data2" but the actual output is nothing.
below query worked perfectly
select id, (meta->"$.options.info[*].data") AS `data`
from tbl
WHERE meta->"$.options.info[1].verified" = 1
but i need to search all item in array not only index 1
how can fix it ?
(sorry for bad english)
Try:
SELECT `id`, (`meta` -> '$.options.info[*].data') `data`
FROM `tbl`
WHERE JSON_CONTAINS(`meta` -> '$.options.info[*].verified', '1');
See dbfiddle.
Related
I read multiple times the MYSQL guide for JSON (https://dev.mysql.com/doc/refman/8.0/en/json-search-functions.html#function_json-extract)
But I still don't find a way to query a range of dates.
I have the following stored JSON:
{"2014/12/10": [22.12323, 1212312.36], "2014/12/11": [24.983516, 59239590.36], "2014/12/15": [24.353891, 10350984.54], "2014/12/16": [24.756853, 51752318.09], "2014/12/17": [24.782038, 31848161.91]}
And the following query:
SELECT
JSON_EXTRACT(contenido, '$."2014/12/11"', '$."2014/12/16"') AS resultado
FROM
tabla_prueba;
I expect the result of:
[24.983516, 59239590.36], [24.353891, 10350984.54], [24.756853, 51752318.09]
But instead, I am getting only the two mentioned values:
[24.983516, 59239590.36], [24.756853, 51752318.09]
I also tried the key word to (for ranges) but with no results. What I am doing wrong?
Using JSON_TABLE
Try:
SET #json = '{
"2014/12/10": [
22.12323,
1212312.36
],
"2014/12/11": [
24.983516,
59239590.36
],
"2014/12/15": [
24.353891,
10350984.54
],
"2014/12/16": [
24.756853,
51752318.09
],
"2014/12/17": [
24.782038,
31848161.91
]
}';
SELECT a.dateStr, json_extract(#json, concat('$."', a.dateStr, '"')) as vals
FROM json_table(json_keys(#json), '$[*]' COLUMNS (dateStr CHAR(10) PATH '$')) a
WHERE a.dateStr BETWEEN '2014/12/11' AND '2014/12/16';
Result:
dateStr
vals
2014/12/11
[24.983516, 59239590.36]
2014/12/15
[24.353891, 10350984.54]
2014/12/16
[24.756853, 51752318.09]
What would be the right way of getting Ajax, i.e. the value for the last occurence for key child1Dob1, from a json field that has a data structure that looks like the below,
{
"data": {
"data": {
"data": {
"child1Dob1": "Andy"
},
"child1Dob1": "Bob"
},
"child1Dob1": "Rick"
},
"child1Dob1": "Ajax"
}
The below query was an attempt from a similar question but i am getting a null value, so obviously i am missing something.
SELECT JSON_EXTRACT(`containerValue`,CONCAT("$.data[",JSON_LENGTH(`containerValue` ->> '$.data')-1,"]")) from myTable where containerKey = 'theContainer';
For CREATE TABLE test (data JSON):
WITH RECURSIVE
cte AS (
SELECT data, data -> '$.data' subdata
FROM test
UNION ALL
SELECT subdata, subdata -> '$.data'
FROM cte
WHERE subdata IS NOT NULL
)
SELECT data ->> '$.child1Dob1'
FROM cte
WHERE subdata IS NULL;
I have a MySQL database and one of the tables is called 'my_table'. In this table, one of the columns is called 'my_json_column' and this column is stored as a JSON object in MySQL. The JSON object has about 17 key:value pairs (see below). I simply want to return a "slimmed-down" JSON Object from a MySQL query that returns 4 of the 17 fields.
I have tried many different MySQL queries, see below, but I can't seem to get a returned subset JSON Object. I am sure it is simple, but I have been unsuccessful.
Something like this:
SELECT
json_extract(my_json_column, '$.X'),
json_extract(my_json_column, '$.Y'),
json_extract(my_json_column, '$.KB'),
json_extract(my_json_column, '$.Name')
FROM my_table;
yields:
5990.510000 90313.550000 5990.510000 "Operator 1"
I want to get this result instead (a returned JSON Object) with key value pairs:
[ { X: 5990.510000, Y: 90313.550, KB: 2105, Name: "Well 1" } ]
Sample data:
{
"Comment" : "No Comment",
"Country" : "USA",
"County" : "County 1",
"Field" : "Field 1",
"GroundElevation" : "5400",
"Identifier" : "11435358700000",
"Interpreter" : "Interpreter 1",
"KB" : 2105,
"Name" : "Well 1",
"Operator" : "Operator 1",
"Owner" : "me",
"SpudDate" : "NA",
"State" : "MI",
"Status" : "ACTIVE",
"TotalDepth" : 5678,
"X" : 5990.510000,
"Y" : 90313.550
}
Thank you in advance.
Use JSON_OBJECT(), available since MySQL 5.6:
Evaluates a (possibly empty) list of key-value pairs and returns a JSON object containing those pairs
SELECT
JSON_OBJECT(
'X', json_extract(my_json_column, '$.X'),
'Y', json_extract(my_json_column, '$.Y'),
'KB', json_extract(my_json_column, '$.KB'),
'Name', json_extract(my_json_column, '$.Name')
) my_new_json
FROM my_table;
This demo on DB Fiddle with your sample data returns:
| my_new_json |
| ----------------------------------------------------------- |
| {"X": 5990.51, "Y": 90313.55, "KB": 2105, "Name": "Well 1"} |
I want to query JSON data with Redshift Spectrum to find out if a field in the JSON exists.
So for example. Given the data:
{ "field1" : { "one" : 1, "two" : 2}, "field2" : true }
{ "field2" : false }
And given I have defined my table as:
CREATE TABLE stackoverflow_sample AS (
field1 struct<
one:varchar,
two:varchar
>,
field2 boolean
)
I want to be able to query it with something like:
SELECT field2 FROM stackoverflow_sample WHERE field1 IS NOT NULL;
And get the result:
TRUE
However I keep getting the error column field1 does not exist
Any idea how to do this?
I am working on converting XML to j son string using the PostgreSQL.
we have attributecentric XML and would like to know how to convert it to j son.
Example XML:
<ROOT><INPUT id="1" name="xyz"/></ROOT>
Need to get the j son as follows:
{ "ROOT": { "INPUT": { "id": "1", "name": "xyz" }}}
got the above json format from an online tool.
any help or guidance will be appreciated.
Regards
Abdul Azeem
Basically, breakdown of this problem is the following:
extract values from given XML using xpath() function
generate and combine JSON entries using json_object_agg() function
The only tricky thing here is to combine key,value pairs together from xpath()/json_object_agg() results, which are{ "id": "1"} and { "name" : "xyz"}.
WITH test_xml(data) AS ( VALUES
('<ROOT><INPUT id="1" name="xyz"/></ROOT>'::XML)
), attribute_id(value) AS (
-- get '1' value from id
SELECT (xpath('//INPUT/#id',test_xml.data))[1] AS value
FROM test_xml
), attribute_name(value) AS (
-- get 'xyz' value from name
SELECT (xpath('//INPUT/#name',test_xml.data))[1] AS value
FROM test_xml
), json_1 AS (
-- generate JSON 1 {"id": "1"}
SELECT json_object_agg('id',attribute_id.value) AS payload
FROM attribute_id
), json_2 AS (
-- generate JSON 2 {"name" : "xyz"}
SELECT json_object_agg('name',attribute_name.value) AS payload FROM attribute_name
), merged AS (
-- Generate INPUT result - Step 1 - combine JSON 1 and 2 as single key,value source
SELECT key,value
FROM json_1,json_each(json_1.payload)
UNION ALL
SELECT key,value
FROM json_2,json_each(json_2.payload)
), input_json_value AS (
-- Generate INPUT result - Step 2 - use json_object_agg to create JSON { "id" : "1", "name" : "xyz" }
SELECT json_object_agg(merged.key,merged.value) AS data
FROM merged
), input_json AS (
-- Generate INPUT JSON as expected { "INPUT" : { "id" : "1", "name" : "xyz" } }
SELECT json_object_agg('INPUT',input_json_value.data) AS data
FROM input_json_value
)
-- Generate final reult
SELECT json_object_agg('ROOT',input_json.data)
FROM input_json;