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SQL query performance is critical in database applications, and query rewriting is a technique that transforms an original query into an equivalent query with a better performance. In a wide range of database-supported systems, there is a…

Databases · Computer Science 2023-05-16 Qiushi Bai , Sadeem Alsudais , Chen Li

While fine-tuned large language models (LLMs) excel in generating grammatically valid SQL in Text-to-SQL parsing, they often struggle to ensure semantic accuracy in queries, leading to user confusion and diminished system usability. To…

Computation and Language · Computer Science 2025-05-20 Jipeng Cen , Jiaxin Liu , Zhixu Li , Jingjing Wang

Natural Language to SQL (i.e., NL2SQL) translation is crucial for democratizing database access, but even state-of-the-art models frequently generate semantically incorrect SQL queries, hindering the widespread adoption of these techniques…

Databases · Computer Science 2025-12-08 Xinyu Liu , Shuyu Shen , Boyan Li , Nan Tang , Yuyu Luo

We present SQL Query Engine, an open-source, self-hosted service that translates natural language questions into validated PostgreSQL queries through a two-stage LLM pipeline. The first stage performs automatic schema introspection and SQL…

Databases · Computer Science 2026-04-21 Muhammad Adeel Ijaz

Query rewriting plays a vital role in enhancing conversational search by transforming context-dependent user queries into standalone forms. Existing approaches primarily leverage human-rewritten queries as labels to train query rewriting…

Human-Computer Interaction · Computer Science 2023-10-19 Fanghua Ye , Meng Fang , Shenghui Li , Emine Yilmaz

With the rapid development of Large Language Models (LLMs), Natural Language Explanations (NLEs) have become increasingly important for understanding model predictions. However, these explanations often fail to faithfully represent the…

Computation and Language · Computer Science 2025-09-09 Yingming Wang , Pepa Atanasova

Query rewriting (QR) is an increasingly important technique to reduce customer friction caused by errors in a spoken language understanding pipeline, where the errors originate from various sources such as speech recognition errors,…

Computation and Language · Computer Science 2020-02-14 Zheng Chen , Xing Fan , Yuan Ling , Lambert Mathias , Chenlei Guo

Natural Language to SQL (NL2SQL) technology empowers non-expert users to query relational databases without requiring SQL expertise. While large language models (LLMs) have greatly improved NL2SQL algorithms, their rapid development…

Databases · Computer Science 2026-04-21 Shizheng Hou , Wenqi Pei , Nuo Chen , Quang-Trung Ta , Peng Lu , Beng Chin Ooi

In addressing the task of converting natural language to SQL queries, there are several semantic and syntactic challenges. It becomes increasingly important to understand and remedy the points of failure as the performance of semantic…

Computation and Language · Computer Science 2023-06-01 Parker Glenn , Parag Pravin Dakle , Preethi Raghavan

Most modern Text2SQL systems prompt large language models (LLMs) with entire schemas -- mostly column information -- alongside the user's question. While effective on small databases, this approach fails on real-world schemas that exceed…

Databases · Computer Science 2025-12-19 Thanh Dat Hoang , Thanh Tam Nguyen , Thanh Trung Huynh , Hongzhi Yin , Quoc Viet Hung Nguyen

Text-to-SQL conversion is a critical innovation, simplifying the transition from complex SQL to intuitive natural language queries, especially significant given SQL's prevalence in the job market across various roles. The rise of Large…

Computation and Language · Computer Science 2024-07-23 Tingkai Zhang , Chaoyu Chen , Cong Liao , Jun Wang , Xudong Zhao , Hang Yu , Jianchao Wang , Jianguo Li , Wenhui Shi

Text-to-SQL, the process of translating natural language into Structured Query Language (SQL), represents a transformative application of large language models (LLMs), potentially revolutionizing how humans interact with data. This paper…

Natural language user interfaces to database systems have been studied for several decades now. They have mainly focused on parsing and interpreting natural language queries to generate them in a formal database language. We envision the…

Databases · Computer Science 2009-09-15 Alkis Simitsis , Yannis Ioannidis

The Natural Language to SQL (NL2SQL) technique is used to convert natural language queries into executable SQL statements. Typically, slot-filling is employed as a classification method for multi-task cases to achieve this goal. However,…

Computation and Language · Computer Science 2023-09-19 Chenduo Hao , Xu Zhang

Translating Natural Language to SQL (NL2SQL) remains a critical bottleneck for democratization of data in enterprises. Although Large Language Models (LLMs) like Gemini 2.5 and other LLMs have demonstrated impressive zero-shot capabilities,…

Artificial Intelligence · Computer Science 2026-03-25 Anshul Solanki , Sanchit Latawa , Koushik Chakraborty , Navneet Kamboj

Despite the remarkable performance of large language models (LLMs) in text-to-SQL (SQL generation), correctly producing SQL queries remains challenging during initial generation. The SQL refinement task is subsequently introduced to correct…

Computation and Language · Computer Science 2026-03-05 Zijin Hong , Hao Chen , Zheng Yuan , Qinggang Zhang , Luyao Zhuang , Qing Liao , Feiran Huang , Yangqiu Song , Xiao Huang

Text-to-SQL enables natural access to databases, yet most benchmarks are English-only, limiting multilingual progress. We introduce MultiSpider 2.0, extending Spider 2.0 to eight languages (English, German, French, Spanish, Portuguese,…

Computation and Language · Computer Science 2025-09-30 Khanh Trinh Pham , Thu Huong Nguyen , Jun Jo , Quoc Viet Hung Nguyen , Thanh Tam Nguyen

The Text-to-SQL task translates natural language questions into SQL queries, enabling intuitive database interaction for non-experts. While recent methods leveraging Large Language Models (LLMs) achieve strong performance, their reliance on…

Computation and Language · Computer Science 2026-01-21 Shengmin Piao , Jieun Lee , Sanghyun Park

Text-to-SQL is a technology that converts natural language queries into the structured query language SQL. A novel research approach that has recently gained attention focuses on methods based on the complexity of SQL queries, achieving…

Computation and Language · Computer Science 2024-06-14 Jiawen Yi , Guo Chen , Zixiang Shen

Converting natural language questions into SQL queries enables non-expert users to interact with relational databases and has long been a central task for natural language interfaces to data. While the WikiSQL dataset played a key role in…

Computation and Language · Computer Science 2025-12-10 Dzmitry Pihulski , Karol Charchut , Viktoria Novogrodskaia , Jan Kocoń