sql - How to retrieve all the rows in postgres where values of a jsonb key is greater then an int value? -


i'm new postgres, if newbie question, please redirect me. i'm trying retrieve rows value greater 0.

this table test.

id | value ----------- 1  |  {'a':1, 'b':2} 2  |  {'a':0, 'b':2} 3  |  {'a':1, 'b':1} 4  |  {'a':0, 'b':0} 5  |  {'a':3, 'b':1} 6  |  {'a':0, 'b':2}

i have attempted

select * test value --> 'a' > 0;

but didn't work. got

error: argument of must type boolean, not type jsonb

-- denotes comment, after ignored. query effectively:

select * test value

which makes error you're getting quite clear. seems meant use ->> operator extract element jsonb column. note, however, return text value, , you'd need convert int yourself:

select * test (value->>'a')::int > 0

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