What Is SQL guides beginners, experts, and intermediate readers through the most important aspects of declarative and procedural SQL. Knowledge gained includes the following: Designing, building, and querying relational databases in the latest versions of oracle and SQL server databases Performing data-quality operations that eliminate corrupted data from databases Extending the functionality of SQL using PL/SQL and programmable T-SQL Building and loading data warehouses without using an expensive ETL tool Troubleshooting and tuning SQL code and database designs Extensive use of built-in...