![]() We have the following JSON functions such as json_each(), json_object_keys (), json_typeof(), etc., available in the PostgreSQL, which help us to enhance the performance while we are using the JSON data type. Note: In the above command, we have used the typecast to modify the qty field into INTEGER type and relate it with two. On implementing the above command, we will get the below result, which displays that Margaret Davis purchased three products from the Purchase table. WHERE CAST ( Purchase_description-> 'items' -> 'qty' AS INTEGER) = 3 Purchase_description -> 'items' -> 'product' AS product SELECT Purchase_description -> 'purchaser' AS Purchaser, The Syntax for PostgreSQL JSON data type is as follows: Since the 9.2 version of PostgreSQL supports the JSON data type, which contains several operators and functions for operating the JSON data values. ![]() JSON is human-readable text distinct from the other formats. The main objective of using the JSON data type is to transfer data between a server and a web application. It is an open-standard format that contains key-value pairs. What is PostgreSQL JSON Data Type?Īnother data type in PostgreSQL is JSON, which stands for JavaScript Object Notation. We also see JSON operator's example with WHERE clause, which helps us to handle JSON data values more resourcefully, and we will use some aggregate function (SUM, MIN, AVG, MAX) to get the JSON data. In this section, we are going to understand the working of the PostgreSQL JSON data type, examples of the JSON data type, and some accessible functions json_each(), json_object_keys (), json_typeof(), etc.
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