Postgres 14

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CREATE TABLE test (
     col1 INT,
     "Col1" INT
);
INSERT INTO test (col1) VALUES (1);
1 rows affected

INSERT INTO test ("col1") VALUES (2);
1 rows affected

INSERT INTO test (Col1) VALUES (3);
1 rows affected

INSERT INTO test ("Col1") VALUES (4);
1 rows affected

SELECT * FROM test;


col1
Col1


1
null

2
null

3
null

null
4

col1	Col1
1	null
2	null
3	null
null	4