SQuirreLSQL Client is a graphical SQL client written in Java that will allow you to view the structure of a JDBC compliant database, browse the data in tables, issue SQL commands etc.
This project builds upon the MongoDB Java driver to provide a limited JDBC implementation to allow graphical tools such as SQuirreLSQL Client to visualize and manipulate MongoDB collections and documents. It will accept an SQL-like syntax for CRUD operations, where "tables" represent MongoDB collections, and rows are individual documents within a collection. Each row has two columns (ObjectId and Document).
Web-based SquirrelSQL client. it allow you to view database structure, import/export and manage your databases, including create database, table, store procedure, view,trigger and user. it support oracle, db2, mysql, MS SQL server, FireBird,Postgres
DB Copy Plugin is a plugin for the SQuirreLSQL Client (1.2beta6 and 2.0 RC1+) that allows copying database objects (schema def and data) from one session window to another. The sessions can be disparate database vendors (Oracle -> MySQL, for instance).