barcode generator in vb.net code project CD_NAME: VARCHAR(60) Patsy Cline: 12 Greatest Hits Out of Africa Fundamental in Software

Drawer Code 39 in Software CD_NAME: VARCHAR(60) Patsy Cline: 12 Greatest Hits Out of Africa Fundamental

CD_NAME: VARCHAR(60) Patsy Cline: 12 Greatest Hits Out of Africa Fundamental
Scan Code39 In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Code 3 Of 9 Creator In None
Using Barcode encoder for Software Control to generate, create Code 3/9 image in Software applications.
MUSIC_TYPE: VARCHAR(15) Country NULL NULL
Recognizing Code 3/9 In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
Generating Code39 In C#.NET
Using Barcode maker for Visual Studio .NET Control to generate, create Code 39 Extended image in .NET applications.
PUBLISHER: VARCHAR(50) MCA Records MCA Records Capitol Records
Making USS Code 39 In .NET
Using Barcode maker for ASP.NET Control to generate, create Code 39 image in ASP.NET applications.
Code39 Generator In .NET
Using Barcode generation for .NET Control to generate, create Code 39 Extended image in Visual Studio .NET applications.
IN_STOCK: INT 32 29 34
Code39 Encoder In VB.NET
Using Barcode printer for .NET framework Control to generate, create Code 3/9 image in .NET applications.
UPC - 13 Generation In None
Using Barcode generation for Software Control to generate, create EAN13 image in Software applications.
Figure 8-3
Making Code 128 Code Set B In None
Using Barcode generator for Software Control to generate, create Code 128 Code Set B image in Software applications.
Code 3/9 Creator In None
Using Barcode drawer for Software Control to generate, create Code 39 Full ASCII image in Software applications.
The CD_INVENTORY table with three rows of data
USS-128 Maker In None
Using Barcode printer for Software Control to generate, create UCC-128 image in Software applications.
Encode UPCA In None
Using Barcode drawer for Software Control to generate, create UPC-A Supplement 2 image in Software applications.
SQL: A Beginner s Guide
Generating Code 11 In None
Using Barcode generator for Software Control to generate, create USD - 8 image in Software applications.
Generating Matrix 2D Barcode In C#
Using Barcode drawer for .NET framework Control to generate, create 2D Barcode image in .NET framework applications.
CD_NAME: VARCHAR(60) Patsy Cline: 12 Greatest Hits Out of Africa Fundamental Orlando
Bar Code Reader In VS .NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
GTIN - 12 Recognizer In Visual Basic .NET
Using Barcode scanner for VS .NET Control to read, scan read, scan image in VS .NET applications.
MUSIC_TYPE: VARCHAR(15) Country NULL NULL Soundtrack
Print Linear In Visual Studio .NET
Using Barcode generation for ASP.NET Control to generate, create 1D image in ASP.NET applications.
Paint GS1 - 12 In Java
Using Barcode drawer for Java Control to generate, create UPC A image in Java applications.
PUBLISHER: VARCHAR(50) MCA Records MCA Records Capitol Records Independent
Encode Bar Code In Java
Using Barcode creation for Eclipse BIRT Control to generate, create barcode image in BIRT applications.
Barcode Drawer In Visual Studio .NET
Using Barcode creation for ASP.NET Control to generate, create bar code image in ASP.NET applications.
IN_STOCK: INT 32 29 34 5
Figure 8-4
The CD_INVENTORY table with four rows of data
If you try to execute an INSERT statement that omits a column that does not permit null values and is not defined with a default value, you will receive an error. When you insert a new row, the RDBMS must get a value for each column from somewhere, so if nulls are not permitted, then the value must come from either a default value (if defined) or the VALUES clause of the INSERT statement.
NOTE
The values that you specify in the VALUES clause must conform to all restrictions placed on a table. This means that the values must conform to the data types or domains associated with a column. In addition, the values are limited by any constraints defined on the table. For example, a foreign key constraint would prevent you from adding any values that violate the constraint, or a check constraint may limit the range of values that can be inserted into the table. Be sure that you re familiar with the restrictions placed on a table before trying to insert data into that table. You can learn more about data types in 3. You can learn more about domains and constraints in 4.
You can, of course, specify all columns in the INSERT INTO clause. If you do this, you must be sure to specify the same number of values, in the same order in which the columns are specified. The following INSERT statement inserts values into all columns of the CD_INVENTORY table:
INSERT INTO CD_INVENTORY ( CD_NAME, MUSIC_TYPE, PUBLISHER, IN_STOCK ) VALUES ( 'Court and Spark', 'Pop', 'Asylum Records', 22 );
When you execute this statement, a row is added to the CD_INVENTORY table, with a value for each column. Figure 8-5 shows the new row, along with the other four rows we have inserted. If you were to omit one of the values from the VALUES clause even if null values were allowed for the related column you would receive an error when you executed that statement.
Inserting Values from a SELECT Statement
Earlier in this chapter, at the beginning of the Insert SQL Data section, I say that the VALUES clause is mandatory and that you need to specify at least one value. There is, however, an alternative to the VALUES clause. You can use a SELECT statement to specify the values that
8:
Modifying SQL Data
CD_NAME: VARCHAR(60) Patsy Cline: 12 Greatest Hits Out of Africa Fundamental Orlando Court and Spark
MUSIC_TYPE: VARCHAR(15) Country NULL NULL Soundtrack Pop
PUBLISHER: VARCHAR(50) MCA Records MCA Records Capitol Records Independent Asylum Records
IN_STOCK: INT 32 29 34 5 22
Figure 8-5
The CD_INVENTORY table with five rows of data
you want to insert into a table. The key to using a SELECT statement, just as with using the VALUES clause, is to make sure that the number of values returned by the SELECT statement matches the required number of values and that those values conform to any restriction on the target table. Let s look at an example. Suppose that, in addition to the CD_INVENTORY table I ve been using in previous examples, your database includes a second table named CD_INVENTORY_2, which includes two columns, as shown in the following table definition:
CREATE TABLE CD_INVENTORY_2 ( CD_NAME_2 VARCHAR(60) IN_STOCK_2 INT NOT NULL, NOT NULL );
The CD_NAME_2 column in the CD_INVENTORY_2 table has the same data type as the CD_NAME column in the CD_INVENTORY table, and the IN_STOCK_2 column in the CD_INVENTORY_2 table has the same data type as the IN_STOCK column in the CD_INVENTORY table. As a result, values taken from the two columns in one table can be inserted into the two columns in the second table.
NOTE
A column in one table does not have to be the same data type as a column in another table for values to be copied from one to the other, as long as the values inserted into the target table conform to the data restrictions of that table.
By using an INSERT statement, you can copy values from the CD_INVENTORY table to the CD_INVENTORY_2 table. The following INSERT statement includes a SELECT statement that queries the CD_INVENTORY table:
INSERT INTO CD_INVENTORY_2 SELECT CD_NAME, IN_STOCK FROM CD_INVENTORY;
Copyright © OnBarcode.com . All rights reserved.