| 1. | The record header contains a bit vector for indicating null columns
记录头包含一个位向量，用来指明空列。 |
| 2. | Trnsaction record header
交易记录标题 |
| 3. | Print record header
印字记录标头 |
| 4. | The record header is followed by the data contents of the columns . columns that are null are omitted
记录头的后面是字段的内容，其中空字段被忽略。 |
| 5. | For each non - null variable - length field , the record header contains the length of the column in one or two bytes
对于每个非空的变长字段，记录头使用一或两个字节包含了列的长度。 |
| 6. | Limits the checking to the integrity of the physical structure of the page , record headers and the physical structure of b - trees
限制为检查页、记录标头的物理结构以及b树物理结构的完整性。 |
| 7. | Limits the checking to the integrity of the physical structure of the page and record headers , the physical structure of b - trees , and the allocation consistency of the database
将检查限制为页和记录标头的物理结构完整性、 b树的物理结构以及数据库的分配一致性。 |
