CREATE TABLE "Logs"(
    id bigint NOT NULL,
    product_id bigint,
    product_price numeric,
    product_store text,
    last_updated timestamp with time zone DEFAULT now()
    );

INSERT into "Logs" VALUES(2095, 13, 249.99, 'BestBuy.com', '2023-04-08 00:20:12.199251+00');
INSERT into "Logs" VALUES(2096, 13, 249.99, 'Target.com', '2023-04-08 00:20:12.199251+00');
INSERT into "Logs" VALUES(2097, 13, 249.99, 'BestBuy.com', '2023-04-09 00:20:12.199251+00');
INSERT into "Logs" VALUES(2098, 13, 249.99, 'BestBuy.com', '2023-04-10 00:20:12.199251+00');
INSERT into "Logs" VALUES(2099, 13, 249.99, 'Target.com', '2023-04-11 00:20:12.199251+00');
INSERT into "Logs" VALUES(2100, 13, 249.99, 'Target.com', '2023-04-12 00:20:12.199251+00');


select json_build_object(product_store, json_build_object('Data', json_agg(t.a))) from (
      select
        product_store, json_build_array(product_price,last_updated) a
        from "Logs" 
    ) t
group by product_store;

select
product_store, json_build_array(product_price,last_updated) a
from "Logs";

-- final JSON
with tmp as (
    select json_build_object(product_store, json_build_object('Data', json_agg(t.a))) json_row from (
      select
        product_store, json_build_array(product_price,last_updated) a
        from "Logs" 
    ) t
    group by product_store)
select json_object_agg(key, value) AS result
FROM   tmp, json_each(json_row); 

PostgreSQL online editor

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About PostgreSQL

PostgreSQL is a open source relational database system and is also knows as Postgres.

Key Features:

  • Postgres is not only free and open-source but also it is highly extensible.
  • Custom Data types and funtions from various programming languaues can be introduced and the good part is compiling entire database is not required.
  • ACID(Atomicity, Consistency, Isolation, Durability) compliant.
  • First DBMS which implemented Multi-version concurrency control (MVCC) feature.
  • It's the default database server for MacOS.
  • It supports all major operating systems like Linux, Windows, OpenBSD,FreeBSD etc.

Syntax help

1. CREATE

CREATE command is used to create a table, schema or an index.

Syntax:

         CREATE TABLE table_name (
                column1 datatype,
                column2 datatype,
                ....);

2. ALTER

ALTER command is used to add, modify or delete columns or constraints from the database table.

Syntax

ALTER TABLE Table_name ADD column_name datatype;

3. TRUNCATE:

TRUNCATE command is used to delete the data present in the table but this will not delete the table.

Syntax

TRUNCATE table table_name;

4. DROP

DROP command is used to delete the table along with its data.

Syntax

DROP TABLE table_name;

5. RENAME

RENAME command is used to rename the table name.

Syntax

ALTER TABLE table_name1 RENAME to new_table_name1; 

6. INSERT

INSERT Statement is used to insert new records into the database table.

Syntax

INSERT INTO table_name (column1, column2, column3, ...) VALUES (value1, value2, value3, ...);

7. SELECT

Select statement is used to select data from database tables.

Syntax:

SELECT column1, column2, ...
FROM table_name; 

8. UPDATE

UPDATE statement is used to modify the existing values of records present in the database table.

Syntax

UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition; 

9. DELETE

DELETE statement is used to delete the existing records present in the database table.

Syntax

DELETE FROM table_name where condition;