在SQL中替换JSON格式的字符串

Question

I have a something like this in my table column:

{"InputDirection":0,"Mask":"AA","FormatString":null,"AutoCompleteValue":null,
 "Filtered":"0123456789","AutoComplete":false,"ReadOnly":true}

What I want to do is to change A to N in "Mask":"AA" and remove "Filtered":"0123456789" if they exist. Mask could be in different forms like A9A , 'AAAA`, etc.

If it was in C# I could do it by myself by parsing it to JSON, etc but I need to do it within SQL.

I've found this article which shows how to parse JSON to Table . This gave me an idea that I can parse each field to temp table and make the changes on that and convert it back to JSON so update the actual field where I take this JSON field from. However, this looks like a cumbersome process for both me and the server.

Any better ideas?

Answer 1

You can use this LINK .

And then use the following code

select * into #demo from
(Select * from parseJSON('{"InputDirection":0,"Mask":"AA","FormatString":null,"AutoCompleteValue":null,
 "Filtered":"0123456789","AutoComplete":false,"ReadOnly":true}

')) a

select * from #demo

--- CHANGE THE DATA HERE AS REQUIRED


DECLARE @MyHierarchy JSONHierarchy;
INSERT INTO @myHierarchy
select * from #demo;


-- USE THIS VALUE AND UPDATE YOUR JSON COLUMN
SELECT dbo.ToJSON(@MyHierarchy)


drop table #demo

Answer 2

I may be getting something wrong here but why can't you simply use REPLACE to update what's needed and LIKE to identify JSON strings that should be updated?

update table_T
set json_string = REPLACE(json_string, '"Filtered":"0123456789",', '')
where json_string like '%"Mask":"AA"%'

Not sure I understand why do you need to parse it….