Understanding UNIQUE Constraints and NULL Values in Oracle
Learn how Oracle handles UNIQUE constraints with NULL values, including single-column and composite constraints. Explore behavior and examples.
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How to Resolve ORA-01033: ORACLE Initialization or Shutdown in Progress
Learn how to resolve the ORA-01033 error in Oracle. A step-by-step guide to troubleshoot and fix initialization or shutdown-in-progress issues.
How to Kill a Specific Connection in Oracle Database
Learn how to identify and terminate specific user sessions in Oracle. Use ALTER SYSTEM commands to safely disconnect or kill unwanted connections.
How to List Active and Open Connections in Oracle
Learn how to identify active user sessions and open connections in Oracle. Use this SQL query to monitor user activity before performing database operations.
How to Retrieve Table Space Name for a Specific User or Table in Oracle
Learn how to retrieve the table space name for a specific user or table in Oracle databases using simple SQL queries.
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