vb.net 2d barcode dll View Creation in Java

Painting Data Matrix in Java View Creation

10.2 View Creation
Creating ECC200 In Java
Using Barcode generation for Android Control to generate, create DataMatrix image in Android applications.
www.OnBarcode.com
Generate Barcode In Java
Using Barcode encoder for Android Control to generate, create Barcode image in Android applications.
www.OnBarcode.com
You can create views with the CREATE VIEW command. Figure 10-1 shows the corresponding syntax diagram.
Create Quick Response Code In Java
Using Barcode printer for Android Control to generate, create QR image in Android applications.
www.OnBarcode.com
Barcode Creation In Java
Using Barcode drawer for Android Control to generate, create Barcode image in Android applications.
www.OnBarcode.com
Figure 10-1. A CREATE VIEW syntax diagram The OR REPLACE option allows you to replace an existing view definition. This is especially useful if you have granted various privileges on your views. View privileges are not retained when you use the DROP VIEW / CREATE VIEW command sequence (as explained later in this section), but a CREATE OR REPLACE VIEW command does preserve them. The FORCE option doesn t check whether the underlying base tables (used in the view definition) exist or whether you have sufficient privileges to access those base tables. Obviously, these conditions must eventually be met at the time you start using your view definition. Normally, views inherit their column names from the defining query. However, you should be aware of some possible complications. For example, you might have a query result on your screen showing multiple columns with the same name, and you may have column headings showing functions or other arbitrary column expressions. Obviously, you cannot use query results with these problems as the basis
UPC - 13 Creation In Java
Using Barcode generator for Android Control to generate, create EAN13 image in Android applications.
www.OnBarcode.com
GS1 - 12 Creation In Java
Using Barcode generation for Android Control to generate, create UPC Symbol image in Android applications.
www.OnBarcode.com
VIEWS
Data Matrix Drawer In Java
Using Barcode encoder for Android Control to generate, create DataMatrix image in Android applications.
www.OnBarcode.com
Create 2/5 Industrial In Java
Using Barcode encoder for Android Control to generate, create 2 of 5 Industrial image in Android applications.
www.OnBarcode.com
for a view definition. Views have the same column naming rules and constraints as regular tables: column names must be different, and they cannot contain characters such as brackets and arithmetic operators. You can solve such problems in two ways: You can specify column aliases in the SELECT clause of the defining query, in such a way that the column headings adhere to all column naming rules and conventions. In this book s examples, we use this method as much as possible. You can specify explicit column aliases in the CREATE VIEW command between the view name and the AS clause (see Figure 10-1).
ECC200 Encoder In Objective-C
Using Barcode creator for iPad Control to generate, create DataMatrix image in iPad applications.
www.OnBarcode.com
Data Matrix Printer In Java
Using Barcode encoder for Java Control to generate, create ECC200 image in Java applications.
www.OnBarcode.com
The WITH CHECK OPTION and WITH READ ONLY options influence view behavior under data manipulation activity, as described later in this chapter, in Section 10-4. Listing 10-1 shows two very similar SQL statements. However, note the main difference; the first statement creates a view, and the second statement creates a table. Listing 10-1. Views vs. Tables SQL> create view dept20_v as 2 select * from employees where deptno = 20; View created. SQL> create table dept20_t as 2 select * from employees where deptno = 20; Table created. SQL> The contents of the view DEPT20_V will always be fully dependent on the EMPLOYEES table. The table DEPT20_T uses the current EMPLOYEES table as only a starting point. Once created, it is a fully independent table with its own contents.
Print Barcode In Java
Using Barcode creation for Java Control to generate, create Barcode image in Java applications.
www.OnBarcode.com
Generate Barcode In Java
Using Barcode printer for Eclipse BIRT Control to generate, create Barcode image in BIRT reports applications.
www.OnBarcode.com
Creating a View from a Query
Creating QR Code In Objective-C
Using Barcode encoder for iPhone Control to generate, create QR Code JIS X 0510 image in iPhone applications.
www.OnBarcode.com
Make ECC200 In VS .NET
Using Barcode maker for ASP.NET Control to generate, create ECC200 image in ASP.NET applications.
www.OnBarcode.com
Listing 10-2 shows an example of a regular query with its result. The query is a join over three tables, providing information about all employees and their departments. Note that we use an alias in the SELECT clause (see line 6) to make sure that all columns in the query result have different names. See line 2, where you select the ENAME column, too.
Create PDF417 In VS .NET
Using Barcode creation for .NET framework Control to generate, create PDF-417 2d barcode image in .NET applications.
www.OnBarcode.com
EAN / UCC - 13 Decoder In Visual Basic .NET
Using Barcode scanner for .NET framework Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
VIEWS
Drawing Matrix 2D Barcode In .NET Framework
Using Barcode drawer for VS .NET Control to generate, create Matrix image in Visual Studio .NET applications.
www.OnBarcode.com
Generating Code 128C In Java
Using Barcode maker for BIRT reports Control to generate, create Code 128 Code Set C image in BIRT applications.
www.OnBarcode.com
Listing 10-2. A Regular Query, Joining Three Tables SQL> 2 3 4 5 6 7 8 9 10 11 select , , , , , from e.empno e.ENAME e.init d.dname d.location m.ENAME as MANAGER employees e join departments d using (deptno) join employees m on (e.empno = d.mgr); INIT ----N JAM TF JM P R AB SCJ CC JJ AA R MG TJA DNAME ---------TRAINING SALES SALES TRAINING SALES SALES ACCOUNTING TRAINING ACCOUNTING SALES TRAINING SALES TRAINING ACCOUNTING LOCATION -------DALLAS CHICAGO CHICAGO DALLAS CHICAGO CHICAGO NEW YORK DALLAS NEW YORK CHICAGO DALLAS CHICAGO DALLAS NEW YORK MANAGER ------JONES BLAKE BLAKE JONES BLAKE BLAKE CLARK JONES CLARK BLAKE JONES BLAKE JONES CLARK
Code 39 Full ASCII Generation In Objective-C
Using Barcode generator for iPhone Control to generate, create ANSI/AIM Code 39 image in iPhone applications.
www.OnBarcode.com
QR-Code Generator In None
Using Barcode printer for Software Control to generate, create Denso QR Bar Code image in Software applications.
www.OnBarcode.com
EMPNO -------7369 7499 7521 7566 7654 7698 7782 7788 7839 7844 7876 7900 7902 7934
Copyright © OnBarcode.com . All rights reserved.