WordPress database error: [You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 1]
SELECT MAX(t1) as hmin FROM historia WHERE t1<

WordPress database error: [You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'AND t2>' at line 1]
SELECT * FROM historia WHERE t1<= AND t2>