CreateUniqueName example Creates a unique name for use with the geoprocessing tools. import arcpy # Set workspace arcpy.env.workspace = "c:/data" # Create a unique name for the Buffer tool's derived output. unique_name = arcpy.CreateUniqueName("temp.shp") # Use unique name for Buffer ...
CreateUniqueName 示例 创建一个可供“缓冲区”和“裁剪”工具配合使用的唯一名称。 importarcpy# Set workspacearcpy.env.workspace="c:/data"# Create a unique name for the Buffer tool's derived output.unique_name=arcpy.CreateUniqueName("temp.shp")# Use unique name for Buffer Tool output dataset na...
百度试题 题目在创建表时创建唯一索引可以用( ) A.设置唯一约束B.Create unique indexC.设置主键约束D.其他都可以相关知识点: 试题来源: 解析 D 反馈 收藏
百度试题 题目“Create Unique Index AAA On 学生表(学号)”将在学生表上创建名为AAA的( ) A. 惟一索引 B. 聚集索引 C. 复合索引 D. 唯一聚集索引 相关知识点: 试题来源: 解析 D.唯一聚集索引 反馈 收藏
UniqueNameA unique name for the action. The name is composed of a publisher prefix + "_" + the unique name. XamlSet to the XAML code that defines your action’s real-time workflow. There is no way to refer to another existing real-time workflow. ...
CREATE [ UNIQUE ] [ CLUSTERED | NONCLUSTERED ] INDEX index_name ON <object> ( column [ ASC | DESC ] [ ,...n ] ) [ INCLUDE ( column_name [ ,...n ] ) ] [ WHERE <filter_predicate> ] [ WITH ( <relational_index_option> [ ,...n ] ) ] [ ON { partition_scheme_name ( ...
On theFilemenu, clickSavetable_name. Create a unique index by using Object Explorer In Object Explorer, expand the database that contains the table on which you want to create a unique index. Expand theTablesfolder. Expand the table on which you want to create a unique index. ...
创建唯一聚集索引的语句是( )A.CREATE CLUSTERED INDEX 列名B.CREATE UNIQUE NONCLUSTERED INDEX 列名C.C
将包含 FILESTREAM 选项“目录名称”的数据库附加到 SQL Server 实例中将提示 SQL Server 验证 Database_Directory 名称是否唯一。 否则,操作ATTACH将失败并显示错误FILESTREAM Database_Directory name is not unique in this SQL Server instance。 为避免此错误,应将可选参数directory_name传递给此操作。
UNIQUE 如果指定了 ONtable-name,那么 UNIQUE 将阻止表的两行或更多行具有相同的索引键值。 在更新行或插入新行的 SQL 语句末尾将强制实施唯一性。 在执行 CREATE INDEX 语句期间也将检查唯一性。 如果表中已经包含具有重复键值的行,那么不会创建索引。