Ahmet Duruöz
Veritabanı yönetim sistemlerinde NULL, çoğu zaman yanlış anlaşılan ve beklenmedik sonuçlara yol açabilen özel bir kavramdır. PostgreSQL’de NULL değeri, bir verinin atanmadığını...
PGSQLTune is a PostgreSQL extension designed to analyze SQL queries and provide practical recommendations for improvement. Currently, it offers basic...
The Oracle database supports automatic rollback of transactions and provides parameters to control this behavior. A row lock restricts access...
A GIN (Generalized Inverted Index) is a powerful PostgreSQL index type designed for optimizing search queries on complex data types, like arrays,...
Parallel execution in Oracle Database enables the decomposition of a SQL statement into multiple smaller tasks, each executed concurrently by...
Wait Event Cause / Problem Solution / Recommendation db file scattered read The session is waiting for a multiblock I/O...
Automatic Transaction Quarantine is a mechanism introduced in Oracle Database 26ai to enhance database availability by isolating transactions that fail...
In Oracle databases, many words are reserved for specific uses or entirely. This helps eliminate typos in SQL statements. You...
Index quality is a factor that directly affects the overall database performance. The quality of an index is measured by...
Exadata database servers also allow setting threshold values for metrics, similar to cell nodes, and sending notifications when these thresholds...
You can use the following commands to identify the serial numbers of Exadata and its components. Exadata Rack It can...
Enqueues are shared memory structures (locks) that serialize access to database resources. They can be associated with a session or...
SecureFiles LOB storage is one of two storage types used with Oracle databases; the other is BasicFiles LOB storage. Several...
For each row in a table, ORA_ROWSCN returns the SCN information of the last change made to that row. This...
Debugging/monitoring can be performed to obtain more detailed information about RMAN processes. This allows us to gain more insight than...
