Database
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SQL Assertions in Oracle: From Theory to Practice with Oracle AI Database
SQL assertions are defined in the standard but are rarely implemented in real databases due to performance and complexity challenges. Vendors like Oracle opt for simpler constraints, such as triggers and stored procedures, to maintain global integrity rules. Consequently, this reflects a gap between theoretical relational models and practical implementations. The evolution shows a preference…
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Oracle SQL: DELETE … RETURNING: Efficient Data Removal with Immediate Feedback
The article discusses the Oracle Database feature “DELETE … RETURNING,” which allows for the deletion of rows while simultaneously retrieving data from those rows. This simplifies operations, reduces network round-trips, and enhances performance. It highlights Oracle’s advanced capabilities, making it invaluable for efficient data manipulation and maintaining records in enterprise systems.
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UPDATE: Release Schedule of Current Database Releases (Doc ID 742060.1)
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Oracle 19c Lab Setup: Essential Steps on VMWare Fusion
This document outlines the steps for installing Oracle Enterprise Linux 8 and Oracle Database 19c on VMware Fusion. Key procedures include configuring network settings, enabling SSH, and installing open-vm-tools. Post-installation tasks involve setting up authentication for the oracle user, configuring firewall ports, and preparing the environment for database operations.
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How to Check Table Replication Status with DBA_GOLDENGATE_SUPPORT_MODE
DBA_GOLDENGATE_SUPPORT_MODE is a key view in Oracle 23ai that provides critical metadata about table replication compatibility with Oracle GoldenGate. It helps Database Administrators identify a table’s support level for replication. Enhanced features allow for more efficient data synchronization across environments, improving the management of replication processes.
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DB creation in EXACS services using DBAASCLI utility
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Control DDL Commands in Oracle Databases
This article discusses implementing a database-level trigger to manage and restrict DDL operations by limiting access to specific users. Unauthorized users attempting DDL actions will encounter a custom error message. The trigger code is provided, along with examples of error stacks generated from prohibited actions such as adding a column or truncating a table. This…
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How to Detect Unused PL/SQL Objects in Oracle
To identify unused PL/SQL code in an Oracle database, several methods are recommended. Strategies include auditing PL/SQL execution, using DBA_DEPENDENCIES views to track dependencies, and analyzing execution data through DBMS_PROFILER. A process for safely removing unused code should be established, including renaming suspected units and ensuring backups before deletion.
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Understanding RAC One Node: Benefits and Drawbacks
RAC OneNode is an Oracle RAC feature that allows a single database instance on one node with easy relocation options. It enhances high availability and simplifies management but is less effective for heavy workloads and multi-node performance. Its complexities in licensing and potential downtime during relocations are notable drawbacks.
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Italy Availability for Oracle Database@Azure
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Top Factors for Oracle Database Migration Success
To migrate Oracle database instances to Oracle Database on Azure, key criteria include database size, workload characteristics, version compatibility, application dependencies, performance requirements, high availability, security compliance, current infrastructure, customization complexity, migration strategy feasibility, backup procedures, and cost implications. Assessing these ensures effective migration planning.
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Oracle Database: Constraints Tutorial
This article compiles various queries and code blocks used to manage disabled constraints in a database schema. It includes SQL statements to identify and enable these constraints. The content will be updated regularly with new insights, and it lists the tested database versions, starting with Oracle Database 23ai.