Enumerazione StatisticsScanType
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.
Spazio dei nomi Microsoft.SqlServer.Management.Smo
Assembly: Microsoft.SqlServer.Smo (in Microsoft.SqlServer.Smo.dll)
Sintassi
'Dichiarazione
Public Enumeration StatisticsScanType
'Utilizzo
Dim instance As StatisticsScanType
public enum StatisticsScanType
public enum class StatisticsScanType
type StatisticsScanType
public enum StatisticsScanType
Membri
| Nome membro | Descrizione | |
|---|---|---|
| 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. |
Osservazioni
The StatisticsScanType enumeration class is served by the SetScanOptions method and the Update method.