Connect three tables on the necessary columns of pandas, vaex

Task: deploy an LLM service that knows all the company's documentation and answers questions from the sales department managers. Current situation: the client has independently assembled a prototype (a separate project with uploaded company information, hosted on a server), but the information from the database is not transmitted to the model — likely, there is an issue with the API. We will provide the code and access. The first step is an audit: fix the existing setup or justifiably rebuild from scratch. Required functionality: Upload all company documentation: description of each service, regulations, FAQ, pricing (all materials will be provided). Answers strictly based on the uploaded documents (RAG). The model does not invent facts; if the answer is not in the database — it honestly informs about it. Access for managers via a link (web interface), with authorization. Scenarios: the manager asks any question about the company's work; inserts the client's question "as is" and receives a ready answer for sending; finds the necessary regulation/report by request. Knowledge base updates without a developer (uploading files through the interface or a connected folder). English language. History of requests for quality control. Technical expectations: LLM via API (Claude/OpenAI — propose with a cost calculation for tokens), RAG pipeline (vector database, embeddings), hosting on our server or in the cloud, HTTPS. The architecture should allow for future connection of the assistant to the analytical data warehouse (parallel project). In the response, indicate: examples of similar RAG projects, stack, timeline, cost of work, and estimated monthly ownership cost (tokens + hosting).

Hello There is a small department where patients are admitted. It is necessary to develop a simple "database" where consumables, medications, and others can be entered, along with incoming and outgoing records, as well as assigning usage to a specific patient. Required functionality Directories Medications Consumables (manual entry option) Patients (ability to continuously add new ones and delete those who have been discharged) Employees (ability to modify)Movement Accounting A single table (movement log) where everything is registered Incoming and write-off Manual correction option When writing off, the nurse must select: date; patient; medication or material; quantity; her full name. The system automatically reduces the balance. When receiving, the head nurse must be able to enter: Delivery date; Medication/material; Remaining quantity; Source; Expiration dateAutomatic Functionality automatic balance calculation; minimum stock control; expiration date control; low stock warnings; protection against writing off more than is available; drop-down lists; data entry validation; conditional formatting.Reports It is necessary to implement automatic reports: current balances; usage over a period; usage by patient; usage by employee; history of movement of a specific medication.Preferred implementation on Google Sheets; We will fill in the databases ourselves. A template for work is needed. I don't know how much this costs, so let's start with $50, and you can suggest your options, preferably with experience.

C# / .NET WPF Developer – Completion of Migration of a Large Invoicing Program RAFSOFT.NET Sp. z o.o. is looking for a C# / .NET developer to complete the rewriting of a large, long-standing invoicing program to a new technology. The project involves the migration of an extensive desktop application for companies, used for invoicing, handling sales documents, contractors, records, and accounting-tax functions. The new version of the program is being created in C# / .NET, using DevExpress components. The project is already about 70% rewritten. We are looking for someone who can help bring it to completion, organize the missing elements, perform tests, and ensure the new version operates in accordance with the existing program. Scope of Work: completion of the migration of a large desktop application to C# / .NET, recreation of the functionality of the old program in the new version, maintaining as identical logic of operation, appearance, and handling as possible, working with DevExpress components, analyzing existing code and comparing the operation of the old and new versions of the program, fixing bugs, completing missing functions, and testing the application, collaborating on the final preparation of the program for deployment. Requirements: very good knowledge of C# and .NET, experience in creating desktop applications for Windows, knowledge of WPF or WinForms, experience with DevExpress or similar UI component libraries, ability to analyze a large existing project, accuracy and patience in reproducing existing functionality, ability to test one's own changes, very good ability to use AI tools supporting programming, code analysis, refactoring, and testing. Preferred: experience with legacy projects, knowledge of or previous work with Visual Basic 6.0, experience in migrating applications from older technologies to C# / .NET, knowledge of issues related to invoicing, accounting, JPK, or KSeF, experience working with large business applications. Who We Are Looking For: We are looking for a self-sufficient, precise, and technically experienced person who can enter an existing project, understand its logic, and consistently bring it to completion. In this project, it is very important not only to write new code but also to faithfully reproduce the operation of the old program — both in terms of functionality and appearance as well as handling. We also require proficiency in using AI tools in daily programming work. We are looking for someone who can use AI practically: for code analysis, bug finding, speeding up migration, creating tests, and organizing the project. About the Company: RAFSOFT.NET Sp. z o.o. is a Polish company creating software for entrepreneurs, accounting offices, and small and medium-sized enterprises. Our main product is the VAT Invoice program, supporting the daily handling of invoices, sales documents, contractors, records, and settlements in accordance with Polish regulations. We develop our own desktop applications and tools related to invoicing, accounting, KSeF, JPK, and automation of business processes. Our solutions are designed with stability, ease of use, and practical application in users' daily work in mind. Company website: www.rafsoft.net

It is necessary to calculate statistics in a medical project (including correlations). Additionally, there is a request to create a mathematical model for predicting the development of pathologies based on available data.

Hello, I need your help in implementing a task. Fix the bugs on the website page, the page displays a 404 error.