This topic includes all the data types that are specific to the DBMSs supported in ArcGIS and what their equivalent native format is in ArcGIS.
Indexing in Databases 通过减少执行查询所需的磁盘访问次数,索引提高了数据库的性能。它是一种数据结构技术,用于在数据库中定位和快速访问数据。多个数据库字段被用来生成索引。表的主键或候选键在第一列(搜索键)中被复制。为了加快数据检索速度,这些值也按排序顺序进行存储。需要强调的是,对数据进行排序并非必需。
User-defined data types are custom data types that you can create and reuse in the database model they are created in. This might occur, for example, if your table has a column with a number data type for asset tracking. But you know that you may be changing from a nu...
The MSdbms_datatype_mapping table contains the allowable data type mappings from the data type in the source database management system (DBMS) to one or more specific data types in the destination DBMS. This table is stored in the msdb database and is used for heterogeneous database ...
BIGINT Same as INTEGER type except that it might hold a larger range of values, depending on the DBMS. DECIMAL(p, s) Exact numerical, precision p, scale s. A decimal number, that is a number that can have a decimal point in it. The size argument has two parts : precision and scale...
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A Database Management System (DBMS) is software that enables efficient storage, organization, and retrieval of data, ensuring data integrity, security, and streamlined management for businesses and industries. DBMS types include Relational, NoSQL, Object-Oriented, Hierarchical, and Network DBMS, each ...
EMPRESS Embedded Database is a full-featured embedded database management software designed for both embedded and real-time applications on Unix, Linux, Windows and Real Time systems. Fast, powerful and maintenance-free, Empress Embedded Database provide
--kingbase.conf配置文件shared_preload_libraries添加 kdb_database_link扩展后重启数据库 --再次登录创建成功 [kes_v8r6c7b12@node2 ~]$ ksql -Usystem -dtest -p5432 ksql (V8.0) Type "help" for help. test=# create public database link kes_link connect to 'system' identified by 'system' ...
Ein großer Vorteil der Enterprise-Geodatabase besteht in der Möglichkeit, die relationalen Datenbanken Ihres Unternehmens nutzen zu können. Enterprise-Geodatabases unterstützen eine große Auswahl an DBMS-Speichermodellen (siehe Tabelle zum Vergleich von Geodatabase-Typen). Hierbei wird ...