| 摘要 |
A group query transformation system for transforming structured query langua ge group query windowed aggregates is provided. The group query transformation system comprises a group query analysis module for analyzing one or more structured query language (SQL)/ on-line analytical programming (OLAP) windowed aggregates th at are not supported by a target database system, and a group query transformation module for transforming the one or more SQL/OLAP windowed aggregates into semantically equivalent standard aggregate functions that are supported by the target database system.
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