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find the corresponding answer to the following SQL statements in Postgres:

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find the corresponding answer to the following SQL statements in Postgres:

select '{"a":1, "b":2}'::jsonb <@ '{"b":2}'::jsonb;

select '{"a":1,"b":2}'::json->>'b';

select '{"a":1, "b":2}'::jsonb ? 'b';

select '[1,2,3]'::json->2;

select '{"a":1, "b":2}'::jsonb @> '{"b":2}'::jsonb;

select '{"a":[1,2,3],"b":[4,5,6]}'::json#>>'{a,2}';

select '{"a":1,"b":2}'::json->'b';

select '[1,2,3]'::json->>2;

select '{"a":[1,2,3],"b":[4,5,6]}'::json#>'{a,2}';

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