UPDATE LineItems SET Quantity = Quantity + 1, ProductID = 'BEV02POP' WHERE RecordID = 92231 in VB.NET

Generate QR Code in VB.NET UPDATE LineItems SET Quantity = Quantity + 1, ProductID = 'BEV02POP' WHERE RecordID = 92231

UPDATE LineItems SET Quantity = Quantity + 1, ProductID = 'BEV02POP' WHERE RecordID = 92231
Generate QR Code In Visual Basic .NET
Using Barcode encoder for .NET framework Control to generate, create QR Code image in Visual Studio .NET applications.
www.OnBarcode.com
Scanning QR-Code In VB.NET
Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
As with the DELETE statement, the UPDATE statement may update zero, one, or many records based on which records match the WHERE clause. The final DML statement, and the one most often used, is SELECT.
Creating Matrix Barcode In Visual Basic .NET
Using Barcode generation for Visual Studio .NET Control to generate, create Matrix image in .NET framework applications.
www.OnBarcode.com
Barcode Drawer In VB.NET
Using Barcode maker for Visual Studio .NET Control to generate, create Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
SELECT ProductID, Quantity FROM LineItems WHERE RecordID = 92231
Painting UPC Symbol In Visual Basic .NET
Using Barcode encoder for .NET Control to generate, create UPC-A image in VS .NET applications.
www.OnBarcode.com
Draw Code 128C In VB.NET
Using Barcode generator for .NET framework Control to generate, create USS Code 128 image in .NET applications.
www.OnBarcode.com
SELECT scans a table (LineItems), looking for all records matching a given criterion (RecordID = 92231), and returns a smaller table that contains just the indicated fields (ProductID and Quantity) for the matching records. The most basic query returns all rows and columns.
Make Barcode In VB.NET
Using Barcode creator for Visual Studio .NET Control to generate, create Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
EAN8 Maker In VB.NET
Using Barcode printer for .NET Control to generate, create EAN-8 image in .NET applications.
www.OnBarcode.com
SELECT * FROM LineItems
Reading Quick Response Code In VS .NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
QR Code ISO/IEC18004 Printer In Java
Using Barcode creation for Java Control to generate, create QR Code JIS X 0510 image in Java applications.
www.OnBarcode.com
|
Printing Barcode In VS .NET
Using Barcode encoder for ASP.NET Control to generate, create Barcode image in ASP.NET applications.
www.OnBarcode.com
Making PDF-417 2d Barcode In None
Using Barcode printer for Online Control to generate, create PDF-417 2d barcode image in Online applications.
www.OnBarcode.com
4: Designing the Database
Printing QR Code ISO/IEC18004 In Objective-C
Using Barcode drawer for iPad Control to generate, create QR Code JIS X 0510 image in iPad applications.
www.OnBarcode.com
Code 3/9 Scanner In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
This query returns all records from the table in no particular order. The asterisk (*) means include all fields. The optional ORDER BY clause returns the results in a specific order.
Decode QR Code 2d Barcode In C#
Using Barcode decoder for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Recognize EAN 128 In Visual Basic .NET
Using Barcode scanner for .NET framework Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
SELECT * FROM LineItems WHERE Quantity > 5 ORDER BY ProductID, Quantity DESC
Linear Barcode Maker In Visual C#.NET
Using Barcode printer for Visual Studio .NET Control to generate, create 1D Barcode image in .NET applications.
www.OnBarcode.com
Generate EAN 128 In Java
Using Barcode generation for Java Control to generate, create UCC - 12 image in Java applications.
www.OnBarcode.com
This query returns all records that have a Quantity field value of more than five, and sorts the results first by the ProductID column (in ascending order) and then by the numeric quantity (in descending order, specified with DESC). Aggregate functions and grouping features let you summarize results from the larger set of data. The following query documents the total ordered quantity for each product in the table:
Encode UCC.EAN - 128 In Objective-C
Using Barcode generator for iPhone Control to generate, create GTIN - 128 image in iPhone applications.
www.OnBarcode.com
ECC200 Encoder In Objective-C
Using Barcode encoder for iPhone Control to generate, create ECC200 image in iPhone applications.
www.OnBarcode.com
SELECT ProductID, SUM(Quantity) FROM LineItems GROUP BY ProductID
You can use joins to link together the data from two or more distinct tables. The following query joins the LineItems and Customer tables on their matching CustomerID columns. This SELECT statement also demonstrates the use of table abbreviations (the LI and CU prefixes) added through the AS clauses; they aren t usually necessary, but they can help make a complex query more readable.
SELECT LI.OrderID, CU.CustomerName, LI.ProductID FROM LineItems AS LI INNER JOIN Customer AS CU ON LI.CustomerID = CU.CustomerID ORDER BY LI.OrderID, CU.CustomerName
This table uses an inner join, one of the five main types of joins, each of which returns different sets of records based on the relationship between the first (left) and second (right) tables in the join: Inner join Returns only those records where there is a match in the linked fields. This type of join uses the INNER JOIN keywords. Left outer join Returns every record from the left table and only those records from the right table where there is a match in the linked fields. If a left table record doesn t have a match, it acts as though all the fields in the right table for that record contain NULL values. This type of join uses the LEFT JOIN keywords. One use might be to join the Product and LineItems tables. You could return a list of the full product name for all available products, plus the total quantity ordered for each one. By putting the Product table on the left of a left outer join, the query would return all product names, even if that product had never been ordered (and didn t appear in the LineItems table).
SQL
|
Right outer join This works just like a left outer join, but all records from the right table are returned, and just the left table records that have a match. This type of join uses the RIGHT JOIN keywords. Full outer join Returns all records from the left and right tables, whether they have matches or not. When there is a match, it is reflected in the results. This type of join uses the FULL JOIN keywords. Cross join Also called a Cartesian join. Returns every possible combination of left and right records. This type of join uses the CROSS JOIN keywords. Joining focuses on the relationship that two tables have. (This use of relationship, by the way, is not the basis for the term relational database.) Some tables exist in a parent-child relationship; one parent record has one or more dependent child records in another table. This is often true of orders; a single order header has multiple line items. This type of relationship is known as one-to-many, since one record is tied to many records in the other table. And the relationship is unidirectional; a given child record does not tie to multiple parent records. A one-to-one relationship ties a single record in one table to a single record in another table. It s pretty straightforward, and is often used to enhance the values found in the original record through a supplementary record in a second table. In a many-to-many relationship, a single record in one table is associated with multiple records in a second table, and a single record in that second table is also associated with multiple records in the first table. A real-world example would be the relationship between teachers and students in a college setting. One teacher has multiple students in the classroom, but each student also has multiple teachers each semester. Practical implementations of many-to-many relationships actually require three tables: the two related tables, and a go-between table that links them together. I will show you a sample of such a table in the upcoming Project section of this chapter.
Copyright © OnBarcode.com . All rights reserved.