select语句给出了正确的结果，但在create table中使用时给出了相同的错误：错误1411（hy000）：函数str \u to \u date的datetime值“”不正确。有什么建议吗？

SELECT extraction_id,invoice_date from extracted_fields 
WHERE nullif(str_to_date(invoice_date,'%Y-%m-%d'),FROM_DAYS(0))  >= '2017-04-01'
AND nullif(str_to_date(invoice_date,'%Y-%m-%d'),FROM_DAYS(0))  <= '2018-03-31';

|        210147 | 2017-09-27   |
|        210150 | 2017-10-05   |
|        210208 | 2018-03-22   |
|        210211 | 2018-03-26   |
|        210214 | 2018-03-27   |
|        210453 | 2018-02-09   |
|        210463 | 2017-11-30   |
|        210594 | 2018-03-28   |
|        210663 | 2017-12-05   |
+---------------+--------------+
51968 rows in set, 24328 warnings (0.21 sec)

mysql> CREATE TABLE `tmp_2017-18_list_subu`
    -> AS
    -> SELECT extraction_id,invoice_date from extracted_fields
    -> WHERE nullif(str_to_date(invoice_date,'%Y-%m-%d'),FROM_DAYS(0))  >= '2017-04-01'
    -> AND nullif(str_to_date(invoice_date,'%Y-%m-%d'),FROM_DAYS(0))  <= '2018-03-31';
ERROR 1411 (HY000): Incorrect datetime value: '' for function str_to_date 

mysql> SELECT @@VERSION;
+-------------------------+
| @@VERSION               |
+-------------------------+
| 5.7.24-0ubuntu0.16.04.1 |
+-------------------------+
1 row in set (0.00 sec)

谢谢您，
苏布