原创 Materialized Views
Materialized Views Materialized views are query results that have been stored or "materialized" in advance as s
2020-07-07 18:08:28
原创 Table Clusters
Table Clusters A table cluster is a group of tables that share common columns and store related data in the sa
2020-07-07 18:08:28
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原创 Types of Indexes
Oracle Database provides several indexing schemes, which provide complementary performance functionality. The i
2020-07-07 18:08:27
原创 Data Dictionary
Data Dictionary An important part of an Oracle database is its data dictionary, which is a read-only set of ta
2020-07-07 18:08:27
原创 Function-Based Indexes
Function-Based Indexes You can create indexes on functions and expressions that involve one or more columns in
2020-07-07 18:08:27
原创 Bitmap Join Indexes
A bitmap join index is a bitmap index for the join of two or more tables. For each value in a table column, the i
2020-07-07 18:08:26
原创 Segments
A segment is a set of extents that contains all the data for a logical storage structure within a tablespace. F
2020-02-21 01:07:04
原创 Spring 事務管理
特此提醒：在使用事務時，千萬不要不假思索地將事務內部拋出異常的地方默默地捕獲，一旦將異常捕獲掉，會造成事務不會回滾。 使用步驟： 步驟一、在spring配置文件中引入<tx:>命名空間 <beans xmlns="http://ww
2020-02-21 01:07:04
原创 Logical Storage Structures
Introduction to Logical Storage Structures Oracle Database allocates logical space for all data in the database
2020-02-21 01:07:04
原创 Partitions
Partitions Partitioning enables you to decompose very large tables and indexes into smaller and more manageable
2020-02-21 01:07:04
原创 Partitioned Indexes
Partitioned Indexes A partitioned index is an index that, like a partitioned table, has been decomposed into sma
2020-02-21 01:07:04
原创 Data Blocks
Data Blocks Oracle Database manages the logical storage space in the data files of a database in units calle
2020-02-21 01:07:04
原创 Extents
Overview of Extents An extent is a logical unit of database storage space allocation made up of contiguous data
2020-02-21 01:07:04
原创 Index-Organized Tables
Index-Organized Tables An index-organized table is a table stored in a variation of a B-tree index structure.
2020-02-21 01:07:03
原创 Dynamic Performance Views
Dynamic Performance Views Throughout its operation, Oracle Database maintains a set of virtual tables that recor
2020-02-21 01:07:03