DROP STATISTICS (Transact-SQL)
Drops statistics for multiple collections within the specified tables in the current database.
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Transact-SQL Syntax Conventions
Syntax
DROP STATISTICS table.statistics_name | view.statistics_name [ ,...n ]
Arguments
- table | view
Is the name of the target table or indexed view for which statistics should be dropped. Table and view names must comply with the rules for Identifiers. Specifying the table or view owner name is optional.
- statistics_name
Is the name of the statistics group to drop. Statistics names must comply with the rules for identifiers
Remarks
Be careful when you drop statistics. Doing so may affect the execution plan chosen by the query optimizer.
Statistics on indexes cannot be dropped by using DROP STATISTICS. Statistics remain as long as the index exists.
For more information about displaying statistics, see DBCC SHOW_STATISTICS (Transact-SQL).
Permissions
Requires ALTER permission on the table or view.
Examples
The following example drops the statistics groups (collections) of two tables. The VendorCredit statistics group (collection) of the Vendor table and the CustomerTotal statistics (collection) of the SalesOrderHeader table are dropped.
-- Create the statistics groups.
USE AdventureWorks;
GO
CREATE STATISTICS VendorCredit
ON Purchasing.Vendor (Name, CreditRating)
WITH SAMPLE 50 PERCENT
CREATE STATISTICS CustomerTotal
ON Sales.SalesOrderHeader (CustomerID, TotalDue)
WITH FULLSCAN;
GO
DROP STATISTICS Purchasing.Vendor.VendorCredit, Sales.SalesOrderHeader.CustomerTotal;
See Also
Reference
ALTER DATABASE (Transact-SQL)
CREATE INDEX (Transact-SQL)
CREATE STATISTICS (Transact-SQL)
sys.stats (Transact-SQL)
sys.stats_columns (Transact-SQL)
DBCC SHOW_STATISTICS (Transact-SQL)
sp_autostats (Transact-SQL)
sp_createstats (Transact-SQL)
UPDATE STATISTICS (Transact-SQL)
EVENTDATA (Transact-SQL)
USE (Transact-SQL)