| 1. | The tableadapters support nullable types Tableadapter支持可为空的类型 |
| 2. | For value types , nullable types will be generated 参数。对于值类型,将生成可为空的类型。 |
| 3. | Correctly generate update statements for nullable columns 能够正确地为可为空的列生成update语句。 |
| 4. | A table should avoid nullable columns 表应避免可为空的列。 |
| 5. | To correctly generate update statements for nullable columns 便能够为可为空的列正确生成update语句。 |
| 6. | To correctly generate update commands when dealing with nullable columns 使用,以便在处理可为空的列时正确生成更新命令。 |
| 7. | Previously , the code would allow default behavior to occur when handling nullable fields 以前,代码允许在处理可为空的域时采用缺省的行为。 |
| 8. | Column b int identity constraint column b pk primary key , - add a column that references another column in the same table F .添加包含默认值的可为空的列以下示例将添加一个包含 |
| 9. | Additionally , null values in bit columns are written as the value 0 because sql server 6 . 5 and earlier versions do not support nullable 另外,由于sql server 6 . 5或更低版本不支持可为空的 |
| 10. | True clears all columns except the declared primary key , nullable columns with no default , and unique key columns 将清除除声明的主键、没有默认值并且可为空的列以及唯一的键列以外的所有列。 |