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README.md
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# T5 large LM Adapt for Text to SQL
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## Spider and Spider-Syn dataset
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The model was fine-tuned on the training splits of [Spider](https://yale-lily.github.io/spider) and [Spider-Syn](https://github.com/ygan/Spider-Syn/tree/main/Spider-Syn) datasets. Instead of using only the questions, we added the database schema to the question, as we wanted the model to generate a question over a given database
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```
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Question: What is the average, minimum, and maximum age for all French musicians?
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Schema: "stadium" "Stadium_ID" int , "Location" text , "Name" text , "Capacity" int , "Highest" int , "Lowest" int ,
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```
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```
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SELECT avg(age), min(age), max(age) FROM singer WHERE country = 'France'
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```
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When evaluating we query the
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=> _query result_:
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```
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[[34.5, 25, 43]]
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```
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print("SQL Query:")
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print(output_text)
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```
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```
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SQL Query:
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SELECT avg(age), min(age), max(age) FROM singer WHERE country = 'France'
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```
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# T5 large LM Adapt for Text to SQL
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### Tl;dr
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This model is purposed to generate structured SQL queries from the natural-language prompts.
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### Intro
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In the Text2SQL task, the model learns how to generate a SQL query based on the question posed in natural language.
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However, in some cases, the SQL query contains unknown columns etc., and altogether does not take the schema of the specific database into account.
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That is where our approach comes in.
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We incorporated the database schema into the input question while training to specify which columns and relations are available to generate an applicable SQL query.
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The exposition of database schema, together with the prompt, allows the model to learn the mapping of the schema to the expected output.
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This allows the model to better generalize to the schemas that were not present in the training data.
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### Base model
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We fine-tune this model from the [t5-large-LM-adapt](https://huggingface.co/google/t5-large-lm-adapt) checkpoint.
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## Spider and Spider-Syn dataset
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The model was fine-tuned on the training splits of [Spider](https://yale-lily.github.io/spider) and [Spider-Syn](https://github.com/ygan/Spider-Syn/tree/main/Spider-Syn) datasets. Instead of using only the questions, we added the database schema to the question, as we wanted the model to generate a question over a given database
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_Input prompt_:
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```python
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Question: What is the average, minimum, and maximum age for all French musicians?
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Schema: "stadium" "Stadium_ID" int , "Location" text , "Name" text , "Capacity" int , "Highest" int , "Lowest" int ,
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"Average" int , foreign_key: primary key: "Stadium_ID" [SEP] "singer" "Singer_ID" int , "Name" text , "Country" text ,
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"Song_Name" text , "Song_release_year" text , "Age" int , "Is_male" bool ,
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foreign_key: primary key: "Singer_ID" [SEP],
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"concert" "concert_ID" int , "concert_Name" text , "Theme" text , "Year" text , foreign_key: "Stadium_ID" text from "stadium",
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"Stadium_ID" , primary key: "concert_ID" [SEP] "singer_in_concert",
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foreign_key: "concert_ID" int from "concert",
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"concert_ID" , "Singer_ID" text from "singer" "Singer_ID" , primary key: "concert_ID" "Singer_ID"
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```
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_Expected output_:
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```sql
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SELECT avg(age), min(age), max(age) FROM singer WHERE country = 'France'
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```
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When evaluating the output, we query the _SQLite_ database and get:
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```
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[[34.5, 25, 43]]
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```
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print("SQL Query:")
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print(output_text)
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```
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outputs:
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```sql
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SQL Query:
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SELECT avg(age), min(age), max(age) FROM singer WHERE country = 'France'
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```
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