When converting a JSONB value to an integer in PostgreSQL, you can use the ::int operator. This operator extracts the inner integer value from the JSONB and converts it to the integer data type. Here’s an example:
SELECT '{"age": 25}'::jsonb -> 'age'::text::int;
In the above example, we have a JSONB value {"age": 25}. By using the -> operator, we extract the value for the key 'age'. The ::text operator converts this value to a text data type, and then ::int converts it to an integer.
The result of the above query will be:
25
So, the JSONB value {"age": 25} is converted to the integer value 25 using the ::int operator.
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