We have a table like this:
我们有一个这样的表:
+----+-------+-----------------+----------------+-----------------+----------------+-----------------+
| ID | Name | RecievedService | FirstZoneTeeth | SecondZoneTeeth | ThirdZoneTeeth | FourthZoneTeeth |
+----+-------+-----------------+----------------+-----------------+----------------+-----------------+
| 1 | John | SomeService1 | 13 | | 4 | |
+----+-------+-----------------+----------------+-----------------+----------------+-----------------+
| 2 | John | SomeService1 | 34 | | | |
+----+-------+-----------------+----------------+-----------------+----------------+-----------------+
| 3 | Steve | SomeService3 | | | | 2 |
+----+-------+-----------------+----------------+-----------------+----------------+-----------------+
| 4 | Steve | SomeService4 | | | | 12 |
+----+-------+-----------------+----------------+-----------------+----------------+-----------------+
+---