语句 alter table smart.CUST_ATTACH_DELETE ALTER COLUMN doc_type int(11) DEFAULT NULL;
[Err] 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 'int(11) DEFAULT NULL' at line 1
[Err] 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 'int(11) DEFAULT NULL' at line 1
'int(11) DEFAULT NULL'这句有错 检查你的Sql版本看看正确的使用方法