The last chapter concluded with the mechanics of how to call
Select, how to handle the errors, and how to access the returned items. This chapter continues that discussion with a walkthrough of the query language used in
The chapter starts by walking through the five clauses that make up the
Select query language; some are required or conditionally required. Following that is the section on data formatting. Nowhere in SimpleDB is the storage format of your data more important than in the realm of queries. We then get into the nitty-gritty details of what SimpleDB allows when forming expressions and predicates. The comparisons and operators and how they interrelate is the real heart of
Select. The chapter concludes ...