What are your strategies for debugging SQL queries?
Describe a systematic, PostgreSQL-focused approach using the provided execution and validation records. Write a query that surfaces executions requiring investigation, including failed executions and successful executions with failed validation checks.
execution_id, query_name, status, error_message, and failed_check_count.failed_check_count descending, execution timestamp descending, and execution_id ascending.| Column | Type | Description |
|---|---|---|
| execution_idPK | INT | Unique query execution identifier |
| query_name | VARCHAR(100) | Name of the executed SQL query |
| executed_at | TIMESTAMP | Timestamp when execution started |
| status | VARCHAR(20) | Execution status |
| returned_rows | INT | Number of rows returned by the query |
| error_message | VARCHAR(255) | Database error message when execution fails |
| Column | Type | Description |
|---|---|---|
| check_idPK | INT | Unique validation check identifier |
| execution_id | INT | Referenced query execution |
| check_name | VARCHAR(100) | Name of the validation check |
| status | VARCHAR(20) | Validation result status |
| observed_value | DECIMAL(12,2) | Value observed by the check |
| expected_value | DECIMAL(12,2) | Expected value for the check |
| notes | VARCHAR(255) | Additional validation details |