Sure, I'll compile the information into a table for easy reference:
| Name | Description | Link |
|---|---|---|
| LearnSQL.com Blog | Articles on SQL-related topics, industry reports, tips, and news. | LearnSQL.com Blog |
| SQLPad | Centralized platform for learning SQL with categorized topics and interview questions from top companies. | SQLPad |
| HackerRank | Offers innovative and conceptual SQL questions, with tests categorized by difficulty level. | HackerRank |
| LeetCode | Comprehensive platform with a list of topics and sub-topics, solutions for tests, and personalized plans. | LeetCode |
| Mode | SQL Learning plan divided into Basic, Intermediate, and Advanced SQL, with practice papers at each level. | Mode |
| DevSkiller | Industry-driven platform offering SQL Online Tests designed for various roles. | DevSkiller |
| SQLZoo | Wide range of SQL practice exercises from basic SELECT statements to complex queries, with immediate feedback. | SQLZoo |
| SQL Fiddle | Quick generation of sample databases and SQL code writing, with schema, query, and results panels. | SQL Fiddle |
| DB-Fiddle | Create tables, insert data, and run queries, supporting various versions of SQL like MySQL, PostgreSQL, and SQLite. | DB-Fiddle |
| DB<>Fiddle | Fiddle site with sample databases and support for multiple SQL versions, including DB2, Firebird, MariaDB, MySQL, Oracle, PostgreSQL, SQLite, and SQL Server. | DB<>Fiddle |
| SQL Bolt | Teaches SQL concepts and includes exercises with sample data sets and questions. | SQL Bolt |
| Oracle Live SQL | Write and run SQL code against an online Oracle database, with helpful scripts and tutorials. | Oracle Live SQL |
| W3Schools | SQL practice feature using exercises where you fill in the blanks to write queries. | W3Schools |
| W3Resource | Tutorials on SQL and exercises with an SQL editor and solutions, featuring a sample data set. | W3Resource |
| StackOverflow Data Explorer | Write and run queries against StackOverflow's database, which includes a large sample database. | Data Explorer |
| Coding Ground by Tutorials Point | Execute SQL online, similar to SQL Fiddle and DB Fiddle, supporting SQLite. | Coding Ground |
| SQL Course | Tutorial on SQL with exercises at the end of each page, featuring a simple SQL editor. | SQL Course |
| Tech on the Net | Learning site for SQL with several practice exercises, each with a sample database and an editor. | Tech on the Net |
| SQL-ex | Tutorials and exercises on SQL, requiring account creation to access exercises, sample data, and SQL query writing. | SQL-ex |
| Rextester | Simple site for writing and running SQL code, supporting MySQL, Oracle, and PostgreSQL. | Rextester |
| SQLize | Run MySQL queries and see the results with some limitations like max 20 rows and temporary tables only. | SQLize |
| SQL Test | Online SQL practice tool for creating and populating tables, writing queries, and seeing results, supporting several SQL versions like Oracle, MySQL, and SQL Server. | SQL Test |
You can copy this table for your reference. Each entry includes the name, a brief description, and the link to the website.