How to determine inefficient query in teradata?

@domenico 

There are several ways to determine inefficient queries in Teradata:

1. Use Teradata's query logging feature: Teradata provides a feature called Query Log that tracks the execution of all queries. By analyzing the log, you can identify queries that are taking longer to execute, consuming more resources, or returning a large number of rows. This can help you pinpoint inefficient queries that need to be optimized.
2. Monitor system performance: Keep an eye on system performance metrics such as CPU usage, I/O throughput, and query response times. If you notice a sudden spike in resource consumption or query execution times, it could be a sign of inefficient queries running on the system.
3. Use Teradata Visual Explain: Teradata Visual Explain is a tool that provides a graphical representation of the query execution plan. By analyzing the execution plan, you can identify any inefficiencies such as missing indexes, unnecessary table scans, or suboptimal join strategies.
4. Analyze query statistics: Teradata provides query-level statistics such as CPU time, I/O time, and row count for each query executed on the system. By analyzing these statistics, you can identify queries that are consuming a disproportionate amount of resources and may need optimization.
5. Use Teradata's query profiling tools: Teradata provides tools such as Query Capture and Query Spotlight that can help you identify and analyze inefficient queries. These tools can capture and analyze query performance metrics in real-time, allowing you to quickly pinpoint and optimize inefficient queries.

By using these methods, you can identify inefficient queries in Teradata and take steps to optimize them for better performance.