By using db<>fiddle, you agree to license everything you submit by Creative Commons CC0.
CREATE TABLE
CREATE TABLE
INSERT 0 4
INSERT 0 2
| id | name | age | gender |
|---|---|---|---|
| 1 | A | 10 | M |
| 2 | B | null | F |
| 3 | C | null | null |
SELECT 3
CREATE TABLE
CREATE TABLE
INSERT 0 4
INSERT 0 2
| id | name | age | gender |
|---|---|---|---|
| 1 | A | 10 | M |
| 2 | B | null | F |
| 3 | C | null | null |
SELECT 3