how can i do to mysql field accept only a-zA-Z instead alphanumeric?
I wonder how make mysql accepting only a-zA-Z in a field
Here cars registrations have first two chars and last two chars as letters and i want slipt the group of two in a table each.

how can i do to mysql field accept only a-zA-Z instead alphanumeric?
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I wonder how make mysql accepting only a-zA-Z in a field
Here cars registrations have first two chars and last two chars as letters and i want slipt the group of two in a table each.
