MySQL存储过程里字符串拼接返回参数的方法

BEGIN
SET @strSql = CONCAT('SELECT ceil(COUNT(*)/5) INTO @rowCount FROM `chargingPole`.`tb_chargeStation`;');
PREPARE s1 FROM @strSql;
EXECUTE s1;
DEALLOCATE PREPARE s1;
SET pageCount = @rowCount
END

设定一个输出参数pageCount integer，在非字符串拼接时使用into关键字