postgresql json function code example

Example 1: json array to string in postgresql

SELECT string_agg(trim(tdata::text, '"'), ', ') from jsonb_array_elements(CAST('[1 , 2]' as jsonb)) tdata

Example 2: postgres json

UPDATE users SET data = jsonb_set(data, '{name}', '"John"');

Example 3: json with postgresql

SELECT info ->> 'customer' AS customer,
	info -> 'items' ->> 'product' AS product
FROM orders
WHERE CAST ( info -> 'items' ->> 'qty' AS INTEGER) = 2

Example 4: postgres json

UPDATE users SET tags = tags || array['admin'];

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