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@@ -12,7 +12,7 @@ Practical SQL is ideal for beginners as well as those who know some SQL and want
 
 ## Which Database Does The Book Use?
 
-We use [PostgreSQL](https://www.postgresql.org), which is free and open source. PostgreSQL is used by some of the world's largest companies. Its SQL syntax adheres closely to the ANSI SQL standard.
+We use [PostgreSQL](https://www.postgresql.org), which is free and open source. PostgreSQL is used by some of the world's largest companies. Its SQL syntax adheres closely to the ANSI SQL standard, and the concepts you learn will apply to most database management systems, including MySQL, Oracle, SQLite, and others. Note that Microsoft SQL Server employs a variant of SQL called T-SQL, which is not covered by Practical SQL.
 
 ## What's In This Repository?