要從資料集卸除的指定資料行。 使用方式 複製 dropColumns(vars, ...) 引數 vars 要卸除之變數名稱的字元向量或清單。 ... 傳送至計算引擎的其他引數。 值 定義轉換的 maml 物件。 作者 Microsoft Corporation Microsoft Technical Support意見反應 此頁面對您有幫助嗎? Yes No 提供產品意見反應 | 在...
The column name in the scheme isn't restricted to the columns in the index definition. Any column in the base table can be specified. filegroup_name Applies to: SQL Server 2008 (10.0.x) and later versions. Specifies a filegroup as the location for the resulting table. If no location is...
The column name in the scheme is not restricted to the columns in the index definition. Any column in the base table can be specified.filegroup_name Applies to: SQL Server 2008 (10.0.x) and later.Specifies a filegroup as the location for the resulting table. If no location is specified ...
ShowColumns函数包含某个表的列并删除其他所有列。 可以使用ShowColumns从多列表创建单列表。ShowColumns包括列,DropColumns不包括列。 对于所有这些函数,结果是已应用转换的新表。 不会修改原始表。 无法使用公式修改现有表。 SharePoint、Microsoft Dataverse、SQL Server 和其他数据源提供用于修改列表、表的列和表(通常...
以下示例删除视图 Reorder。 SQL 复制 DROP VIEW IF EXISTS dbo.Reorder ; GO 另请参阅 ALTER VIEW (Transact-SQL) CREATE VIEW (Transact-SQL) EVENTDATA (Transact-SQL) sys.columns (Transact-SQL) sys.objects (Transact-SQL) USE (Transact-SQL) sys.sql_expression_dependencies (Transact-SQL)反馈...
EVENTDATA (Transact-SQL) sys.partition_functions (Transact-SQL) sys.partition_parameters (Transact-SQL) sys.partition_range_values (Transact-SQL) sys.partitions (Transact-SQL) sys.tables (Transact-SQL) sys.indexes (Transact-SQL) sys.index_columns (Transact-SQL)反馈...
After a rule is dropped, new data entered into the columns previously governed by the rule is entered without the constraints of the rule. Existing data isn't affected in any way. The DROP RULE statement doesn't apply to CHECK constraints. For more information about dropping CHECK constraints...
The column name in the scheme is not restricted to the columns in the index definition. Any column in the base table can be specified. filegroup_name Specifies a filegroup as the location for the resulting table. If no location is specified and the table is not partitioned, the resulting ...
Iftable(or the base table ofview) contains one or more domain index columns, this statement executes the appropriate indextype insert routine. Issuing anINSERTstatement against a table fires anyINSERTtriggers defined on the table. See Also: ...
The nickname must be listed in the catalog (SQLSTATE 42704). The nickname is deleted from the database. All information about the columns and indexes associated with the nickname is deleted from the catalog. Any materialized query tables that are dependent on the nickname are dropped. Any ...