java.sql.SQLException: Illegal mix of collations (utf8_general_ci, COERCIBLE) and (latin1_swedish_ci, NUMERIC)
is a novice's problem, in fact, the date format is not formatted when the string is compared.
SHOW FULL COLUMNS FROM table name; view character encoding of the field
Illegal mix of collations (utf8_general_ci,COERCIBLE) and (latin1_swedish_ci,NUM
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