CHAPTER 3
Procedural Code
T-SQL has always included support for procedural programmingCASE expressions in the form of control-of-flow statements and cursors. One thing that throws developers from other languages off their guard when migrating to SQL is the peculiar three-valued logic (3VL) we enjoy. Chapter 1 introduced you to SQL 3VL, and this chapter expands further on this topic. SQL 3VL is different from most other programming languages’ simple two-valued Boolean logic. This chapter also discusses T-SQL control-of-flow constructs, which allow you to change the normally sequential order of statement execution. Control-of-flow statements let ...
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