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Found 65 Skills
Expert-level Snowflake data warehouse platform, virtual warehouses, data sharing, streams, tasks, and SQL optimization
Provides data-retrieval best practices, tool selection guidance, and performant SQL query syntax for BigQuery telemetry across INFORMATION_SCHEMA, Cloud Monitoring, and the REST API. Use when the telemetry to fetch is already known, selecting telemetry tools, writing performant INFORMATION_SCHEMA queries, retrieving telemetry for diagnosing single-job performance bottlenecks, investigating slot contention, job concurrency and queue latency, analyzing reservation capacity, utilization and autoscaling saturation, or auditing capacity-based and on-demand compute and storage resource billable usage. Don't use for root-cause diagnosis or symptom troubleshooting when the cause is unknown (use bigquery-troubleshooting first), or for writing or optimizing business logic SQL (use bigquery-optimization).
Designs database schemas, indexing strategies, query optimization, and migration patterns for SQL and NoSQL databases. Use when designing tables, optimizing queries, fixing N+1 problems, planning migrations, or when asked about database performance, normalization, ORMs, or data modeling.
Identify performance issues in WooCommerce PHP code. Use when writing or reviewing code that loads collections of post-based objects (products, orders), renders product lists with images, reads multiple options in a loop or method, or writes SQL queries involving joins, aggregates, meta lookups, or range queries.
Use when a query, report or PL/SQL unit is slow, before adding an index or a hint, or when someone says "cham", "toi uu truy van", "optimize this query", "why is this report slow", "full table scan". Measures with the optimizer's own plan and statistics, changes one thing at a time, and proves the gain with the same measurement - license-safe, no AWR/ASH or Tuning Pack.