Solve the programming task below in a Python markdown code block.
Make a function that will return a greeting statement that uses an input; your program should return, `"Hello,  how are you doing today?"`.

SQL: return results in a column named ```greeting```

*[Make sure you type the exact thing I wrote or the program may not execute properly]*
Also feel free to reuse/extend the following starter code:
```python
def greet(name):
```