sp_dbcc_differentialreport

Generates a report that highlights the changes in I/O statistics and faults that took place between two dbcc operations.

Syntax

sp_dbcc_differentialreport [dbname [, objectname]], 
	[db_op] [, "date1" [, "date2"]]

dbname – specifies the name of the database. If you do not specify a dbname, the report contains information on all databases in dbccdb..dbcc_operation_log.
objectname – specifies the name of the table or index for which you want the report generated. If object_name is not specified, statistics on all objects in the target database are reported.
db_op – specifies the source of the data to be used for the report. The only value is checkstorage. The report is generated on the data specified by db_op on date1 and date2 for the specified object in the target database. If dates are not specified, the last two operations of the type db_op are compared.
date1 – specifies the first date of a dbcc checkstorage operation to be compared.
date2 – specifies the last date of a dbcc checkstorage operation to be compared.

Example 1 – Generates a report that shows the changes in I/O statistics and faults that occurred in the sysprocedures table between May 1, 1997 and May 4, 1997:
```
sp_dbcc_differentialreport master, sysprocedures, 
    checkstorage, "05/01/97", "05/04/97"
```

There are additional considerations when using sp_dbcc_differentialreport:

sp_dbcc_differentialreport generates a report that highlights the changes in I/O statistics and faults that occurred between two dbcc operations. It compares counter values reported from two instances of dbcc checkstorage. Only the values that have been changed are reported.
If only one date is specified, the results of the dbcc checkstorage operation selected by the specified date are compared to the results of the dbcc checkstorage operation immediately preceding the selected operation.
If no dates are specified, the results of last two dbcc checkstorage operations are compared.
If sp_dbcc_differentialreport returns a number for object_name, it means the object was dropped after the dbcc checkstorage operation completed.
If no changes occurred between the specified operations, sp_dbcc_differentialreport does not generate a report.

See also dbcc in Reference Manual: Commands.

The permission checks for sp_dbcc_differentialreport differ based on your granular permissions settings.

Setting	Description
Enabled	With granular permissions enabled, you must be the database owner of `dbccdb` (or `dbccalt`), or have the `report checkstorage` privilege on the specified database.
Disabled	With granular permissions disabled, any valid user for the specified database can run sp_dbcc_differentialreport.