From: | Chris Gormley <chris(dot)gormley2(at)gmail(dot)com> |
---|---|
To: | pgsql-novice(at)lists(dot)postgresql(dot)org |
Subject: | JSON query when object keys unnamed |
Date: | 2020-08-08 07:26:45 |
Message-ID: | D4E712D7-EFF7-437C-AEB8-ED3AB09E2D5F@gmail.com |
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Thread: | |
Lists: | pgsql-novice |
Hi all,
I’m new to this, so I hope someone can help me. I have the following JSON in a data field that I’m trying to separate into its component parts but having difficulty with the unnamed object keys:
{
“CId” : ”xxx”,
”EId” : ”xxx”,
“MEColl” : [{
“Key” : “Trans.PLF” ,
“Value” : “0001”
}, {
“Key” : “Trans.BA”,
“Value” : “8.0”
}, {
“Key” : “Trans.TS”,
“Value” : “2020-05-01T00:00:00”
}]
“MId” : “xxx”
}
So the question is, how do I extract each of the 3 x values from the key/value pairs for “MEColl” as they all have the name of “Key” rather than a unique name?
So far, I’ve managed to isolate the first key/value pair using:
SELECT
data->’MEColl’->0
This returns:
{“Key” : “Trans.PLF” , “Value” : “0001”}
But what I need are the values “Trans.PLF” and “0001” as well as the other values of the other 2 x key/value pairs.
I think I might have to use jsonb_array_elements but can’t seem to get the syntax right.
I know this is simple stuff for the experienced, but struggling despite trying read most of the internet to resolve myself.
Any help greatly appreciated.
Thanks
Chris
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