research HELIOS Harmonizing Early Fusion, Late Fusion, and LLM Reasoning for Multi-Granular Table-Text Retrieval KDD Cup 2024 Meta CRAG Three-step Question-Answering Framework for Retrieval-Augmented Generation SPARTA Scalable and Principled Benchmark of Tree-Structured Multi-hop QA over Text and Tables internship Oracle Labs NL2SQL Development of NL2SQL Generation Model for Oracle Database academic DB Log Anomaly Detection Detecting Anomalies in Database Log Data using Enhanced Anomaly Transformer