Tham khảo tài liệu 'single row functions', công nghệ thông tin, cơ sở dữ liệu phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 3 Single Row Functions ORACLG Objectives Explain the various types of functions available in SQL. Identify the basic concepts of using functions. Include a variety of character number and data functions in SELECT statements. Explain the conversion functions and how they might be used. 3-2 Introduction to Oracle SQL and PL SQL Using Procedure Builder Objectives Functions make the basic query block more powerful and are used to manipulate data values. This is the first of two lessons that explore functions. You will focus on single row character number and date functions as well as those functions that convert data from one type to another for example character data to numeric. At the end of this lesson you should be able to Explain the various types of functions available in SQL. Identify the basic concepts of using functions. Use a variety of character number and date functions in SELECT statements. Explain the conversion functions and how they might be used. Single Row Functions .
