After an index is dropped, the resulting heap appears in thesys.indexescatalog view withNULLin thenamecolumn. To view the table name, joinsys.indexeswithsys.tablesonobject_id. For an example query, see example D. On multiprocessor computers that are running SQL Server 2005 Enterprise edition ...
KillQueryNotificationSubscriptionStatement KillStatement KillStatsJobStatement LabelStatement LedgerOption LedgerTableOption LedgerViewOption LeftFunctionCall LikePredicate LineNoStatement ListenerIPEndpointProtocolOption ListTypeCopyOption 文本 LiteralAtomicBlockOption LiteralAuditTargetOption LiteralAvailabilityGroupOption Lit...
After an index is dropped, the resulting heap appears in the sys.indexes catalog view with NULL in the name column. To view the table name, join sys.indexes with sys.tables on object_id. For an example query, see example D.On multiprocessor computers that are running SQL Server 2005 ...
Because DDL triggers are not schema-scoped and, therefore do not appear in thesys.objectscatalog view, the OBJECT_ID function cannot be used to query whether they exist in the database. Objects that are not schema-scoped must be queried by using the appropriate catalog view. For DDL trigger...
I have created a foreign key (in SQL Server) by: alter table company add CountryID varchar(3); alter table company add constraint Company_CountryID_FK foreign key(CountryID) references Country; I then run this query: alter table company drop column CountryID; and I get this error: Msg...
After an index is dropped, the resulting heap appears in thesys.indexescatalog view with NULL in thenamecolumn. To view the table name, joinsys.indexeswithsys.tablesonobject_id. For an example query, see example D. On multiprocessor computers that are running SQL Server 2005 Enterprise Edition...
KillQueryNotificationSubscriptionStatement KillStatement KillStatsJobStatement LabelStatement LedgerOption LedgerTableOption LedgerViewOption LeftFunctionCall LikePredicate LineNoStatement ListenerIPEndpointProtocolOption ListTypeCopyOption 文本 LiteralAtomicBlockOption LiteralAuditTargetOption LiteralAvailabilityGroupOption Lit...
IF NOT EXISTS (SELECT name FROM sys.filegroups WHERE name = N'NewGroup') BEGIN ALTER DATABASE AdventureWorks2012 ADD FILEGROUP NewGroup; ALTER DATABASE AdventureWorks2012 ADD FILE (NAME = File1, FILENAME = 'C:\Program Files\Microsoft SQL Server\MSSQL10.MSSQLSERVER\MSSQL\DATA\File1.ndf')...
snapshots (SQL Server). Dropping a database snapshot clears entries in the plan cache associated with the database snapshot, not the instance as a whole. Clearing the plan cache causes a recompilation of all subsequent execution plans and can cause a sudden, temporary decrease in query ...
BinaryQueryExpression BinaryQueryExpressionType BooleanBinaryExpression BooleanBinaryExpressionType BooleanComparisonExpression BooleanComparisonType 布爾值Expression 布爾值ExpressionSnippet 布爾值IsNullExpression 布爾值NotExpression 布爾值ParenthesisExpression 布爾值TernaryExpression BooleanTernaryEx...