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SELECT 20 AS x UNION SELECT NULL UNION SELECT 2.2;
| x |
|---|
| 9.9 |
| null |
| 2.2 |
SELECT 020 AS x UNION SELECT NULL UNION SELECT 2.2;
| x |
|---|
| 20.0 |
| null |
| 2.2 |
| x |
|---|
| 9.9 |
| null |
| 2.2 |
| x |
|---|
| 20.0 |
| null |
| 2.2 |