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The scope of DDL triggers can be a database (CREATE TRIGGER name ON DATABASE ...) or the entire SQL Server instance (CREATE TRIGGER name ON ALL SERVER). When you use the entire instance, you can capture all events executed on commands that have server-level scope as well as any commands that have database-level scope in the SQL instance.
Reserved words in SQL and related products In SQL:2023 [3] In IBM Db2 13 [4] In Mimer SQL 11.0 [5] In MySQL 8.0 [6] In Oracle Database 23c [7] In PostgreSQL 16 [1] In Microsoft SQL Server 2022 [2]
In relational databases, the log trigger or history trigger is a mechanism for automatic recording of information about changes inserting or/and updating or/and deleting rows in a database table. It is a particular technique for change data capturing, and in data warehousing for dealing with slowly changing dimensions.
PostgreSQL schemas are namespaces, allowing objects of the same kind and name to co-exist in a single database. They are not to be confused with a database schema —the abstract, structural, organizational specification which defines how every table's data relates to data within other tables.
PostgreSQL: PostgreSQL License Postgres Plus Advanced Server: Proprietary Progress Software: Proprietary R:Base: Proprietary RethinkDB: Apache License 2.0 SAND CDBMS: Proprietary SAP HANA: Proprietary SAP Adaptive Server Enterprise: Proprietary SAP IQ (formerly known as Sybase IQ) Proprietary SingleStore: Proprietary Snowflake Cloud Data ...
In the context of Oracle Databases, a schema object is a logical data storage structure. [4] An Oracle database associates a separate schema with each database user. [5] A schema comprises a collection of schema objects. Examples of schema objects include: tables; views; sequences; synonyms; indexes; clusters; database links; snapshots ...
Internal schema—definition of the physical representation of the stored data. Uniface leaves the internal schema to the many relational database systems to which it could be connected, enabling it to be database-independent. Uniface was developed on the DEC VAX machine, using the native VAX file-management system RMS.
That is the domain of the physical schema. Now logical schemas describe data in terms of relational tables and columns, object-oriented classes, and XML tags. A single set of tables, for example, can be implemented in numerous ways, up to and including an architecture where table rows are maintained on computers in different countries.