Tuesday, April 12, 2011

What are user defined datatypes and when you should go for them?

User defined datatypes let you extend the base SQL Server datatypes by providing a descriptive name, and format to the database. Take for example, in your database, there is a column called Flight_Num which appears in many tables. In all these tables it should be varchar(8). In this case you could create a user defined datatype called Flight_num_type of varchar(8) and use it across all your tables.

at
Labels:

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)
  • Add two integers together
    Module Tester     Sub  Main ()        Dim  firstNumber, secondNumber  As  String        Dim  number1, number2, sumOfNumbers  As  Intege...
  • Turn Explicit off to use variable without declaration
    Option Explicit Off Module Module1      Sub  Main ()          EmployeeName =  "Buddy Jamsa"          EmployeePhoneNumber =  ...
  • Cause compiler error when Option Strict On
    Module Module1         Sub  Main ()      Dim  AnInt  As  Integer =  5      Dim  ALong  As  Long =  7      ALong = AnInt      'ca...