2、SQLDatabaseSequentialChain SQLDatabaseChain会将数据库所有的表信息发送给大模型,如果数据库的表比较多且复杂,构造的prompt会很长,这样会超过一些大模型的token长度限制,而有些问题其实不需要把所有表发送给大模型,也会造成资源浪费。 SQLDatabaseSequentialChain会先进性一次判断,
INSERTINTOsequential_chain (id,data, next_id) VALUES(2,'Data 2',3); INSERTINTOsequential_chain (id,data, next_id) VALUES(3,'Data 3',NULL); 步骤3:访问数据项 可以使用SQL的SELECT语句来访问顺序链表中的数据项。通过指定条件和使用JOIN语句,可以在链表中定位和访问特定的数据项。 SELECT*FROMsequent...
Issue with current documentation: when I write the following code from langchain_experimental.sql import SQLDatabaseSequentialChain I get the following error: Cannot find reference 'SQLDatabaseSequentialChain' in 'init.py' Idea or reques...
Sure, I can provide an example of how to use theSQLDatabaseSequentialChainclass to reduce the number of tokens for llms. This class is particularly useful when the number of tables in the database is large. It first determines which tables to use based on the query, and then calls the ...
sql_query_chain 方式将生成sql和执行两步分开,你可以在中间加入自定义功能,比如sql安全检查,权限控制等功能 sql_chain 方式将生成sql和执行合并,使用方式简单,提供优化的SQLDatabaseSequentialChain,但是没对sql做检查控制,会有安全风险 sql_agent 方式自由组合tools,可以自定义tool来实现sql的检查控制,agent_type只支...
For example, a product ID uniquely identifies products in the Production.Product table in the AdventureWorks2022 database. Queries in which a sequential search is specified, such as WHERE ProductID BETWEEN 980 and 999, would benefit from a clustered index on ProductID. This is because the...
《数据库系统实现原理》或者叫做《Database System implementation》一书中对表的存储方式应该有更详尽的描...
Scrollable cursors are cursors in which fetches and DML operations do not need to be forward sequential only. Interfaces exist to fetch previously fetched rows, to fetch the nth row in the result set, and to fetch the nth row from the current position in the result set.See Also: Oracle ...
Azure Data Studio: used for database management and querying Node.js: runtime environment that powers the backend services of My Smart Memory Express: web framework, supporting routes and controllers on Node.js Playwright: used for content scraping LangChain: used for text splitting and chunki...
Pythondatabase: db_user: root db_password: your password db_host: bj-cynosdbmysql-grp-kjfaeho8.sql.tencentcdb.com db_port: 22696 db_name: shophai: model: llama3.1:8b base_url: http://62.234.25.23:6399/ Pythonfrom langchain_community.utilities import SQLDatabasefrom langchain_core.prompts...