Simple SQL Retrieval
This chapter begins a sequence of chapters that focus on SQL retrieval statements. This chapter covers specifying columns for display, and choosing rows from one table at a time. It introduces the construction of SQL predicates using relationship operators, logical operators, and SQL’s special operators.
As we’ve said several times earlier, retrieval is what databases are all about: We put the data in so we can get them out in some meaningful way. There are many ways to formulate a request for data retrieval, but when it comes to relational databases, SQL is the international standard. It may not seem very “modern” because it’s a text-based language, ...
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