Open Source C# SQL Clients

SQL Notebook is a free Windows application for querying and analyzing data across multiple sources, including SQLite, PostgreSQL, Excel, and CSV files. It combines a SQL editor with a notebook interface, allowing for data exploration, transformation, and visualization in one place. SQL Notebook is ideal for analysts and data enthusiasts.

SqlKata is a powerful and elegant SQL query builder for .NET that provides a fluent, expressive syntax to construct complex SQL queries programmatically. It supports multiple database engines and can compile queries to raw SQL with parameters, making it easy to integrate with Dapper or ADO.NET. SqlKata emphasizes flexibility and readability, enabling developers to write maintainable and reusable query logic.

https://sourceforge.net/projects/in2sql Video for best usage https://rb.gy/tvl8lk This Excel Addin helps SQL analytic create an Excel report based on ODBC relational data. *Creates table base on data from a relational database *Generate a pivot report using the same external connection (1) *Some ad-hoc tools are available - like "keep only" and "remove only" *you can use the row limit option for exploring the largest dataset *The ODBC connection manager is available *auto-build query tool can create SQL select statement by using different database tables with matching them by column name * creating connections for PowerQuery news and updates -- change list -- v05 beta export tables and SQL to CSV files treat CSV like relational tables -- add Cloud ClickHouse Source resolve the problem with an untrusted source changed Sql Editor fixed behavior for "update rows"

Convert Sql server databases to SQLite format.

Evolve is a lightweight database migration tool for .NET applications, compatible with PostgreSQL, MySQL, SQLite, and SQL Server. Designed with simplicity and speed in mind, it runs SQL scripts in order and tracks their history to keep database schema consistent. Evolve integrates easily with .NET projects for version-controlled schema updates.

NEW version 1.0.6!!! is released. Bugs fixed related to system thread. Database Management Control for FireBird database developed using .NET (C#) .

Sql editor, simular to the Microsoft Query Analyzer, in a Visual Studio type of enviroment. QueryCommander includes features like IntelliSense, automatic comment header, xml-documentation, xml2data etc. 100% of all donations go to Plan International.

This program connects to a users MSSQL Database, and searches it entirely for a search string. When finished, the results are populated in the log as preformatted queries that can be copy/pasted into SSMS for additional analysis.

Feature rich web based SQL Server Explorer and Management Tool. Dynamic forms, DDL/Data script generator and Structure and data comparision tool. Tabbed AJAX/Atlas driven smart web based SQL Editor.

A small .NET application that allows you to connect to the Microsoft Access database files (*. mdb) and execute SQL-queries to them. More information in russian can be fount here - http://2lx.ru/2009/02/mdb-sql-client/