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| bday_day | bday_month | bday_year |
|---|---|---|
| 3 | 7 | 2001 |
| 25 | 7 | null |
| 25 | 8 | null |
SELECT 3
| bday_day | bday_month | bday_year |
|---|
SELECT 0
| bday_day | bday_month | bday_year |
|---|---|---|
| 3 | 7 | 2001 |
| 25 | 7 | null |
| 25 | 8 | null |
SELECT 3
| bday_day | bday_month | bday_year |
|---|
SELECT 0