SQL

UESQLC (Universal Embedded SQL Compiler)
Computers, Programming, Languages, SQL - UESQLC (Universal Embedded SQL Compiler). An embedded SQL-92 precompiler for C++ and Java, designed to be extensible using SGML documents.
https://www.uesqlc.org/
SQL Tutorial - Learn SQL
Computers, Programming, Languages, SQL - SQL Tutorial. SQL tutorial featuring comprehensive guide to SQL language concepts and SQL commands.
http://www.sql-tutorial.net
Database and SQL eLearning
Computers, Programming, Languages, SQL - Database and SQL eLearning. Database theory and an online tutorial interface to an Oracle database system, allowing a user to learn SQL interactively.
https://db.grussell.org/