Tài liệu creating views doc

... view. 5. Remove all views from the data dictionary. Confirm that no views exist in the data dictionary. Creating Views 14Ć9 Creating a View continued There are two classifications for views: simple ... read-only Introduction to Oracle: SQL and PL/SQL Using Procedure Builder14Ć4 Creating Views 14 Creating Views 14Ć11 Creating a View continued Control the column names by in...

Ngày tải lên: 21/12/2013, 06:17

... PL/SQL Using Procedure Builder13Ć16 Creating Sequences 13Ć11 Creating a Sequence continued Confirming Sequences Once you have created your sequence, it is documented in the data dictionary. Since ... CURRVAL pseudocolumns. D Retrieve the next number in the sequence by referencing sequence.NEXTVAL. D Return the current available number by referencing sequence.CURRVAL. Creating Sequences...

Ngày tải lên: 10/12/2013, 16:16

... that the Oracle7 Server does not enforce the constraint and simply documents it. Enable the constraint by using the ENABLE clause. Creating Tables 9Ć35 Summary The Oracle7 Server stores data in tables. ... Procedure Builder9Ć38 Introduction to Oracle: SQL and PL/SQL Using Procedure Builder9Ć8 Creating Tables 9Ć25 Creating a Table from a Table Instance Chart Create your tables, based on...

Ngày tải lên: 10/12/2013, 17:15

... NONUNIQUE S_EMP_USERID_UK USERID 1 UNIQUE Creating Indexes 15Ć23 Practice Overview In this practice you will create an index on the WORKER table. Practice Contents D Creating non-unique indexes D Displaying ... stored in uppercase in the data dictionary. Creating Indexes 15Ć3 Objectives If you want to improve the performance of some queries, you should consider creating an index. You...

Ngày tải lên: 21/12/2013, 06:17

... Creating Interfaces Inheriting from a class is a powerful mechanism, but the real power of inheritance ... example: interface IComparable { int CompareTo(object obj); } TIP The Microsoft .NET Framework documentation recommends that you preface the name of your interfaces with a capital I. This convention

Ngày tải lên: 24/12/2013, 09:16

... var syntax when you're creating an array on an object unless you're building your own custom class of objects. This concept is discussed in Lesson 7 , " ;Creating Custom Classes."

Ngày tải lên: 21/01/2014, 13:20

... double-clicking the function command. Syntax 2 This code represents the second syntax for creating functions: myFunction = function (parameter1:DataType,parameter2:DataType,etc.) ... or to define your own custom method of an object (which we'll discuss in Lesson 7 , " ;Creating Custom Classes"). The only difference between this syntax and Syntax 1 is in the .....

Ngày tải lên: 26/01/2014, 11:20

... < Day Day Up > Creating Variables You have created many variables in Lessons 1 –5. Here in Lesson 6, we formally ... names—monikers you cannot change, though you can alter their contents. Here's the syntax for creating a variable: var myFullName:String = "Jobe Makar"; The script declares ... myFullName = "Jobe Makar"; This script is a va...

Ngày tải lên: 26/01/2014, 11:20

... topics: • Creating a simple view • Creating a complex view • Creating a view with a check constraint • Attempting to modify data in the view • Displaying view definitions • Removing views 11-13 Copyright ... 11-6 Copyright © Oracle Corporation, 2001. All rights reserved. Simple Views and Complex Views Feature Simple Views Complex Views Number of tables One One or more Conta...

Ngày tải lên: 17/02/2014, 14:20

... select On or After [ Team LiB ] Creating Custom Views The power of views comes not from the predefined views, but from the ability to create your own custom views. You can customize the current ... Figure 3.11. Use the Custom View Organizer to create new views, and to copy, modify, delete, and reset existing views. When modifying views, select the view by name if you want t...

Ngày tải lên: 26/01/2014, 04:20