AYUDA Trigger mysql

[Sergio_Ivan]

Error

consulta SQL: Documentación

CREATE TRIGGER ACT_CENTROS AFTER INSERT ON sugartest.citas_citas_nominales
FOR EACH
ROW
BEGIN DECLARE cur1 CURSOR
FOR SELECT id_centro
FROM sugartest.citas_citas_nominales
GROUP BY id_centro;

MySQL ha dicho: Documentación
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 5