PostgreSQL-how to select jsonb column array object values

Question

I facing one issues about select the jsonb column value. I want to display the check in and out time data when the day is equal to Monday. I tried to use

SELECT name, dayp -> 'days' ->> 'Monday'
FROM  attendanceprofile, 
      jsonb_array_elements(daysprofile) as dayp;

cannot get the value.

The value inside the jsonb column is

[ {
        "days": {
            "Monday": {
                "checkin": "7:00",
                "checkout": "18:00"
            },
            "Tuesday": {
                "checkin": "5:00",
                "checkout": "16:00"
            }
        }
    } ]

Your JSONB value is an array, so you would need to access by element, but perhaps it isn't supposed to be an array at all. — Thom Brown
– Thom Brown, Commented Jan 14, 2021 at 13:16
Is it always the first element in the array you want to look at? What if your array has more elements? — user330315
– user330315, Commented Jan 14, 2021 at 13:26
No. Depand on today day for display checkin and checkout times — Benjamin Y
– Benjamin Y, Commented Jan 14, 2021 at 13:31

user330315 · Accepted Answer · 2021-01-14 13:47:31Z

1

If you always have a single element (or you always want this from the first element), you can pick those values using the "path operator" #>>

SELECT name, 
       daysprofile #>> '{0,days,Monday,checkin}' as checkin,
       daysprofile #>> '{0,days,Monday,checkout}' as checkout
FROM  attendanceprofile

answered Jan 14, 2021 at 13:47

user330315

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