SQL is a database language used to build and maintain database objects, and is at the heart of many enterprise applications. If you're involved in software development, you're likely to use some level of SQL. When working with SQL, you need a good syntax reference. Although SQL is a standardized language, the implementation of SQL is not standardized, and there are many differences in software from one vendor to another.

PostgreSQL is a free, open-source relational database management system, known as the most successful database in the world. It has a long history dating back to 1985, started as a research project at the University of California, Berkeley. It not only supports many advanced features, but its performance can even exceed that of most databases in many application scenarios, including commercial databases. In fact, PostgreSQL has been considered one of the most popular databases in the world, one of the most admired databases by developers, and one of the databases with the strongest user demand.

Universal SQL Viewer is a handy and portable database viewing software developed by Arabic Solution from China, supporting Oracle, MSSQL (SQL Server), MySQL and InterBase these 4 major types of database. Its user interface is simple and has only one function, and just because it does not integrate complicated settings, it is so easy to use and takes up very few system resources.

Devart's dbForge Studio is a series of database server all-in-one software from Czech Republic. It can help database developers and administrators efficiently fulfill any complex routine tasks on three primary RDBMS (relational database management system): Microsoft SQL Server, MySQL and Oracle Database.