Gabungkan beberapa baris menjadi satu dengan lebih dari satu nilai baris dalam satu kolom

Dari kondisi Anda saat ini, Anda cukup melakukan pivot menggunakan FILTER klausa:

demo:db<>biola

SELECT
    response,
    document,
    MAX(bill) FILTER (WHERE label = 'bill') as bill,
    MAX(answer) FILTER (WHERE label = 'amount') as amount,
    MAX(product) FILTER (WHERE label = 'product') as product,
    MAX(answer) FILTER (WHERE label = 'price') as price
FROM t
GROUP BY response, document

Saya tidak yakin, bagaimana tampilan tabel asli Anda. Jika lebih seperti ini:

response | document | label   | value
-------: | -------: | :------ | :----
71788176 | 79907201 | bill    | 26899
71788176 | 79907201 | amount  | 1    
71788176 | 79907201 | product | shoes
71788176 | 79907201 | price   | 25.99

Kemudian Anda dapat memodifikasi kueri seperti ini:

demo:db<>biola

SELECT
    response,
    document,
    MAX(value) FILTER (WHERE label = 'bill') as bill,
    MAX(value) FILTER (WHERE label = 'amount') as amount,
    MAX(value) FILTER (WHERE label = 'product') as product,
    MAX(value) FILTER (WHERE label = 'price') as price
FROM t
GROUP BY response, document

Sunting :UNTUK menambahkan nilai JSON ke kolom produk:

demo:db<>biola

Varian 1:Anda cukup menggunakan tipe json ke dalam ketik text :

MAX(product::text) FILTER (WHERE label = 'product') as product,

Varian 2:Anda membaca nilai dari "name" atribut:

MAX(product ->> 'name') FILTER (WHERE label = 'product') as product,