StatisticsScanType 列舉
The StatisticsScanType enumeration contains values that specify the ways in which statistical information is collected from tables or views during the creation or update of a statistic counter.
命名空間： Microsoft.SqlServer.Management.Smo
組件： Microsoft.SqlServer.Smo (在 Microsoft.SqlServer.Smo.dll 中)
語法
'宣告
Public Enumeration StatisticsScanType
'用途
Dim instance As StatisticsScanType
public enum StatisticsScanType
public enum class StatisticsScanType
type StatisticsScanType
public enum StatisticsScanType
成員
| 成員名稱 | 說明 | |
|---|---|---|
| Default | Value = 5. Specifies that a percentage of the table or indexed view is used when collecting statistics. The actual percentage is calculated by the SQL Server engine automatically. | |
| FullScan | Value = 3. Specifies that all rows in the table or view are read when gathering statistics. This option must be used if a view is specified and it references more than one table. | |
| Percent | Value = 1. Specifies that a percentage of the table or indexed view is used when collecting statistics. This options cannot be used if a view is specified and it references more than one table. When specified, use the sampleValue argument to indicate number of rows. | |
| Resample | Value = 4. Specifies that the percentage ratio of the table or indexed view used when collecting statistics is inherited from existing the statistics. | |
| Rows | Value = 2. Specifies that a number of rows in the table or indexed view are used when collecting statistics. This option cannot be used if a view is specified and it references more than one table. When specified, use the sampleValue argument to indicate number of rows. |
備註
The StatisticsScanType enumeration class is served by the SetScanOptions method and the Update method.