What Delimiter to Use?

A delimiter is one or more characters that separate text strings. Common delimiters are commas (,), semicolon (;), quotes ( ", ' ), braces ({}), pipes (|), or slashes ( / \ ). When a program stores sequential or tabular data, it delimits each item of data with a predefined character.

What should I use as a delimiter?

If you have the option of a string as column separator, use "" as delimiter. You can make up any string for that matter and gives you flexibility.

What is the best delimiter for CSV?

Technically comma is as good as any other character to be used as a separator. The name of the format directly refers that values are comma separated (Comma-Separated Values). The description of CSV format is using comma as an separator. Any field containing comma should be double-quoted.