A comma splice occurs where a comma joins two or more independent parts of a sentence. The comma should not do this, but I see it every day.
Here’s an example:
The CEO is on leave, her executive assistant will handle all queries.
The above sentence has two parts, each with a subject and a verb. This means they are both independent clauses and shouldn’t be joined by a comma.
To write the example sentence correctly, do one of the following:
1- Keep the comma and add a conjunction (and, so, but):
The CEO is on leave, and her executive assistant will handle all queries.
2- Use a full stop instead of the comma:
The CEO is on leave. Her executive assistant will handle all queries.
3- Use a semi-colon instead of the comma:
The CEO is on leave; her executive assistant will handle all queries.