Is it possible to create a mysql field which will only accept the characters a-zA-Z ?
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Is it possible to create a mysql field which will only accept the characters a-zA-Z ?
You will need to look at the REGEX replace function detailed here How to count words in MySQL / regular expression replacer? (involves a UDF though) which you would need to use on a BEFORE INSERT trigger.
Alternatively you can look at sanitising the input in your code prior to insertion. This would be a more efficient method as most languages i.e. PHP support Regex, so a simple regex replace before insertion would be trivial.
MySQL unfortunately has no way to specify constraints such as this on columns.