为 SQLite 生成 SQL，使用其他 LLM 和 Vanna 托管向量数据库（推荐）¶
本 Notebook 将详细介绍如何使用 vanna Python 包通过 AI（RAG + LLM）生成 SQL，包括连接到数据库和进行训练。如果您还没准备好在自己的数据库上进行训练，仍然可以使用示例 SQLite 数据库 尝试。
您想使用哪个 LLM？
您想将“训练”数据存储在哪里？
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[已选择] Vanna 托管向量数据库（推荐）免费使用 Vanna.AI 的托管向量数据库 (pgvector)。这可在不同机器上使用，无需额外设置。
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ChromaDB免费在本地使用 ChromaDB 的开源向量数据库。无需额外设置 -- 所有数据库文件将在本地创建和存储。
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Marqo免费在本地使用 Marqo。需要额外设置。或者使用他们的托管选项。
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其他向量数据库使用任何其他向量数据库。需要额外设置。
设置¶
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%pip install vanna
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from vanna.vannadb.vannadb_vector import VannaDB_VectorStore
from vanna.base import VannaBase
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class MyCustomLLM(VannaBase):
def __init__(self, config=None):
pass
def generate_plotly_code(self, question: str = None, sql: str = None, df_metadata: str = None, **kwargs) -> str:
# Implement here
def generate_question(self, sql: str, **kwargs) -> str:
# Implement here
def get_followup_questions_prompt(self, question: str, question_sql_list: list, ddl_list: list, doc_list: list, **kwargs):
# Implement here
def get_sql_prompt(self, question: str, question_sql_list: list, ddl_list: list, doc_list: list, **kwargs):
# Implement here
def submit_prompt(self, prompt, **kwargs) -> str:
# Implement here
class MyVanna(VannaDB_VectorStore, MyCustomLLM):
def __init__(self, config=None):
VannaDB_VectorStore.__init__(self, vanna_model=MY_VANNA_MODEL, vanna_api_key=MY_VANNA_API_KEY, config=config)
MyCustomLLM.__init__(self, config=config)
vn = MyVanna()
您想查询哪个数据库？
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Postgres
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Snowflake
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BigQuery
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[已选择] SQLite
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其他数据库使用 Vanna 为任何 SQL 数据库生成查询
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vn.connect_to_sqlite('my-database.sqlite')
训练¶
您只需要训练一次。除非您想添加更多训练数据，否则无需再次训练。
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df_ddl = vn.run_sql("SELECT type, sql FROM sqlite_master WHERE sql is not null")
for ddl in df_ddl['sql'].to_list():
vn.train(ddl=ddl)
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# The following are methods for adding training data. Make sure you modify the examples to match your database.
# DDL statements are powerful because they specify table names, colume names, types, and potentially relationships
vn.train(ddl="""
CREATE TABLE IF NOT EXISTS my-table (
id INT PRIMARY KEY,
name VARCHAR(100),
age INT
)
""")
# Sometimes you may want to add documentation about your business terminology or definitions.
vn.train(documentation="Our business defines OTIF score as the percentage of orders that are delivered on time and in full")
# You can also add SQL queries to your training data. This is useful if you have some queries already laying around. You can just copy and paste those from your editor to begin generating new SQL.
vn.train(sql="SELECT * FROM my-table WHERE name = 'John Doe'")
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# At any time you can inspect what training data the package is able to reference
training_data = vn.get_training_data()
training_data
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# You can remove training data if there's obsolete/incorrect information.
vn.remove_training_data(id='1-ddl')
提问 AI¶
每当您提出一个新问题时，它会找到 10 条最相关的训练数据，并将其作为 LLM 提示的一部分用于生成 SQL。
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vn.ask(question=...)
启动用户界面¶
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from vanna.flask import VannaFlaskApp
app = VannaFlaskApp(vn)
app.run()
