| 1. | Histograms correspond to only the first column for a multi - column statistic
直方图只对应于多列统计的第一列。 |
| 2. | Table 2 . column statistics
表2 .列统计信息 |
| 3. | The following example creates single - column statistics for all eligible columns for all user tables in the
数据库中的所有用户表的所有合格列创建单列统计信息。 |
| 4. | All columns index specifies whether the update statistics statement affects column statistics , index statistics , or all existing statistics
指定update statistics语句是否影响列统计信息、索引统计信息或所有现有统计信息。 |
| 5. | For more information about creating or updating column statistics which help the query optimizer choose a more efficient query plan , see
有关创建或更新列统计信息（这些统计信息有助于查询优化器选择更有效的查询计划）的详细信息，请参阅 |
| 6. | As the data in a column changes , index and column statistics can become out - of - date and cause the query optimizer to make less - than - optimal decisions on how to process a query
随着列中数据发生变化，索引和列的统计信息可能会过时，从而导致查询优化器选择的查询处理方法不是最佳的。 |
