Can a table field contain a hyphen?

by

Yes, you can use punctuation, white space, international characters, and SQL reserved words if you use delimited identifiers:

SELECT * FROM `my-table`;

In MySQL, use the back-ticks. In standard SQL, use double-quotes.

Or if you use MySQL you can set the ANSI_QUOTES SQL mode:

SET SQL_MODE = ANSI_QUOTES;
SELECT * FROM "my-table";

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