Is there any error in the following MySQL command?

SELECT emp_id, title, start_date, fname, fed_id
FROM person
ORDER BY LEFT (fed_id, 3);

Solution (By Examveda Team)

This question tests your understanding of how MySQL handles ordering and extracting substrings. Let's break down the code:
The Code:
```sql SELECT emp_id, title, start_date, fname, fed_id FROM person ORDER BY LEFT (fed_id, 3); ```
* SELECT ... FROM ...: This part retrieves data from the "person" table. * ORDER BY ...: This part sorts the results. * LEFT (fed_id, 3): This function extracts the first 3 characters from the "fed_id" column. It's used to sort the data based on these initial 3 characters.
The Question:
The question asks if there's an error in the command.
The Answer:
The answer is Option B: No error. The command is valid.
Why the answer is Option B:
While it's possible the query might not produce the expected results if the data in "fed_id" doesn't follow a consistent pattern, the command itself is syntactically correct and will execute without error.
Important Notes:
* Data Type: The "fed_id" column should contain a data type that allows for substring extraction. If it's a numeric column, you'll need to convert it to a string first using the CAST function. * Order: The order of the results will be based on the first 3 characters of "fed_id," even if other columns are also in the SELECT clause.
Let me know if you want a more detailed explanation of the LEFT function or data type considerations.