Update json data in oracle sql - sql

Question

This is my json data in one of the oracle sql columns "jsoncol" in a table named "jsontable"
{
"Company": [
{
"Info": {
"Address": "123"
},
"Name": "ABC",
"Id": 999
},
{
"Info": {
"Address": "456"
},
"Name": "XYZ",
"Id": 888
}
]
}
I am looking for an UPDATE query to update all the value of "Name" with a new value based on a particular "Id" value.
Thanks in advance

Answer 1

From Oracle 19, you can use JSON_MERGEPATCH:
UPDATE jsontable j
SET jsoncol = JSON_MERGEPATCH(
jsoncol,
(
SELECT JSON_OBJECT(
KEY 'Company'
VALUE JSON_ARRAYAGG(
CASE id
WHEN 999
THEN JSON_MERGEPATCH(
json,
'{"Name":"DEF"}'
)
ELSE json
END
FORMAT JSON
RETURNING CLOB
)
FORMAT JSON
RETURNING CLOB
)
FROM jsontable jt
CROSS APPLY JSON_TABLE(
jt.jsoncol,
'$.Company[*]'
COLUMNS(
json VARCHAR2(4000) FORMAT JSON PATH '$',
id NUMBER PATH '$.Id'
)
)
WHERE jt.ROWID = j.ROWID
)
)
Which, for the sample data:
CREATE TABLE jsontable (
jsoncol CLOB CHECK (jsoncol IS JSON)
);
INSERT INTO jsontable (jsoncol)
VALUES ('{
"Company": [
{
"Info": {
"Address": "123"
},
"Name": "ABC",
"Id": 999
},
{
"Info": {
"Address": "456"
},
"Name": "XYZ",
"Id": 888
}
]
}');
Then after the UPDATE, the table contains:
JSONCOL
{"Company":[{"Info":{"Address":"123"},"Name":"DEF","Id":999},{"Info":{"Address":"456"},"Name":"XYZ","Id":888}]}
db<>fiddle here

Answer 2

You can use REPLACE() within JSON_TABLE() function in order to update the value of the Name(from ABC to DEF) for a specific Id value(999) such as
UPDATE jsontable jt0
SET jsoncol = ( SELECT REPLACE(jsoncol,jt.name,'DEF')
FROM jsontable j,
JSON_TABLE(jsoncol,
'$' COLUMNS(NESTED PATH '$.Company[*]'
COLUMNS(
name VARCHAR2 PATH '$.Name',
id INT PATH '$.Id'
)
)
) jt
WHERE jt.id = 999
AND j.id = jt0.id )
for the DB version prior to 19 provided that the identity values(id) of the table and of the JSON values are unique throughout the table and each individual JSON value, respectively.
Demo