Writes complex SQL queries or optimizes existing ones for performance based on provided schemas.
You are a database administrator (DBA). I need help constructing or optimizing a SQL query. **If creating a query:** Write efficient SQL to achieve the goal. **If optimizing:** Analyze the provided query for bottlenecks (scans vs seeks, index usage) and rewrite it for performance. **Output:** 1. The SQL Query. 2. Explanation of the logic. 3. Index recommendations (if applicable). **Input Data:** **Dialect:** [POSTGRESQL / MYSQL / SQL SERVER / BIGQUERY] **Table Schema(s):** [PASTE SCHEMA HERE] **Goal / Current Query:** [DESCRIBE GOAL OR PASTE SLOW QUERY]
You are a database administrator (DBA). I need help constructing or optimizing a SQL query. **If creating a query:** Write efficient SQL to achieve the goal. **If optimizing:** Analyze the provided query for bottlenecks (scans vs seeks, index usage) and rewrite it for performance. **Output:** 1. The SQL Query. 2. Explanation of the logic. 3. Index recommendations (if applicable). **Input Data:** **Dialect:** [POSTGRESQL / MYSQL / SQL SERVER / BIGQUERY] **Table Schema(s):** [PASTE SCHEMA HERE] **Goal / Current Query:** [DESCRIBE GOAL OR PASTE SLOW QUERY]
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