sqlpostgresqlpostgresql-9.1postgresql-json

sql how to select row based on json format field value?

I have a table ,one of the table filed is json format:

my_table

id  json_field

1   { "to_status": 7, "to_status_name": "In Progress", "role": "admin"}

2   { "to_status": 3, "to_status_name": "Completed", "role": "admin"}

3   { "to_status": 2, "to_status_name": "Completed", "role": "customer"}

How can I select all rows that "to_status" is 3 or 2 ?

Any friend can help?

Solution

  • When extracted Json values are strings. So you need to test for string values or cast to_status extracted values to an integer:

    SELECT * FROM my_table WHERE json_field->>'to_status' in ('2','3');
or
SELECT * FROM my_table WHERE (json_field->>'to_status')::int in (2,3);

    But then you can get the same results extracting the to_status_name:

    SELECT * FROM my_table WHERE json_field->>'to_status_name' = 'Completed';