6. SQL Basics

This chapter describes the basic elements of SQL.

Organization of this chapter

• 6.1 SQL writing conventions

• 6.2 Data types

• 6.3 Literals

• 6.4 Datetime information acquisition functions

• 6.5 User information acquisition function

• 6.6 Variables (dynamic parameters)

• 6.7 Null value

• 6.8 Scope variables

• 6.9 Derived column names

• 6.10 Reserved words

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