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Programming Visual Basic [Book]
Download Full PDF Package. This paper. A short summary of this paper. 12 Full PDFs related to this paper. READ PAPER. Programming Visual Basic. Download. Programming Visual Basic by Tim Patrick. Released May Publisher (s): O'Reilly Media, Inc. ISBN: Explore a preview version of Programming Visual Basic right now. O’Reilly members get unlimited access to live online training experiences, plus books, videos, and digital content from + publishers 3/6/ · Programming Visual Basic PDF Download Free | Tim Patrick | O'Reilly Media | | | MB | blogger.com Applications with
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It just kind of makes sense. If you have data, you need to put it somewhere. What a shock. All my disk files are organized for easy access. My saved emails can be sorted by subject or date received or sender, so they must be in a database, 9780596518431 pdf download. Even this document can be searched and sorted in any manner I wish.
Is it a database? Perhaps that definition is too broad. The relational databases 9780596518431 pdf download most programmers use collect data in tableseach of which stores a specific set of unordered records. For convenience, tables are presented as a grid of data values, 9780596518431 pdf download, with each row representing a single record and 9780596518431 pdf download column representing a consistent field that appears in each record.
Table presents a table of orders, with a separate record for each line item of the order. Putting all of your information in a table is really convenient. Unfortunately, this table of orders has a lot of repetition. Customer names and product names repeat multiple times. Codd, the brilliant computer scientist that he was, saw these problems, too.
But instead 9780596518431 pdf download just sitting around and complaining about them like I do, he came up with a solution: normalization. For the sample orders in Table9780596518431 pdf download, the data could be normalized into three separate tables: one for order line items, one for customers, and one 9780596518431 pdf download products see TableTableand Tablerespectively.
To get combined results from multiple tables at once, join or link their matching fields, 9780596518431 pdf download. For instance, you can link the Customer ID field in the table of line items with the matching Customer ID primary key field in the table of customers. Once joined, the details for a single combined line item record can be presented with the matching full customer name.
Figure shows the relationships between the customer, product, and order line tables. To join tables together, relational databases 9780596518431 pdf download query languages that allow you to manipulate the data using relational algebra from which the term relational database derives. The most popular of these languages, SQL, uses simple English-like sentences to join, order, summarize, and retrieve just the data values you need.
The primary statement, SELECTprovides basic data selection and retrieval features. Three other common statements, INSERTUPDATEand DELETElet you manipulate the records stored 9780596518431 pdf download each table. Together, these four statements make up the primary data manipulation language DML commands of SQL. SQL also includes data definition language DDL statements that let you design the tables used to hold the data, as well as other database features.
They also battle one another over important features such as data replication, crash-proof data integrity, the speed at which complex queries return the requested results, and who has the biggest private jet.
Although it began its life as a derivative of Sybase another relational databaseit has been given the Microsoft touch. Although Microsoft was somewhat late in joining the relational database game, it has done a pretty good job at playing catch-up. Oracle still gets high marks for at least its perception of being the most robust, the most stable, 9780596518431 pdf download, and the most platform-independent of the various players.
But SQL Server scores big as well, especially with its somewhat lower costs and its more intuitive visual tools. Originally, Microsoft touted SQL Server as a business-minded tool for business-minded people with their business-minded agendas and their business-minded three-piece poly-knit double-breasted suits, and it is still viewed in this way.
But Microsoft is increasingly identifying the database as a development tool, especially with the release. It was no coincidence that Microsoft chose to debut that version of SQL Server November 7,the same day as the release of Visual Studio All flavors of Visual Studio now include some version of SQL Server—even the low-end Visual Studio Express Edition products have access to a SQL Server Express Edition complement.
NET applications, 9780596518431 pdf download, but SQL Server now allows you to craft embedded stored procedures using. NET code, along with the native and more traditional T-SQL scripting language. Microsoft announced the release of SQL Serverthe latest version of its star database product, in tandem with Visual Studio However, although the two products share a common launch date, the actual availability dates of the two products are months apart, with SQL Server coming out after Visual Studio.
Almost everything you read about SQL Server in this book will work identically in SQL Server If you choose to use the version of the product, you should have no difficulties in following the discussion in this book. It runs in the background on a system and communicates with you, the user, by having you first establish a standard network connection with the server engine.
This is true even if the SQL Server engine runs on your own workstation. Watching a server product is about as exciting as reading some of those other Visual Basic tutorial books that you wisely avoided, 9780596518431 pdf download, so Microsoft provides various client tools that let you manage databases, tables, and other relational database properties.
SQL Server Management Studio is the standard enterprise-level client tool for managing SQL Server databases, 9780596518431 pdf download. For SQL Server Express Edition, Microsoft supplies a reduced yet friendlier tool, SQL Server Management Studio Express see Figure This tool lets you manage databases and process DDL and DML statements.
Management Studio Express is not included in SQL Server Express Edition; you must download or obtain it separately from Microsoft. Because some readers of Programming Visual Basic may only have access to SQL Server Express Edition and the related SQL Server Management Studio Express toolall examples in this book are designed for use with that edition of the database engine.
This only impacts the few times when I refer specifically to the client tools. Although Microsoft continues to update and sell Microsoft Access, it is recommending more and more that professional developers use and distribute databases in SQL Server format. Microsoft will even permit you to redistribute SQL Server Express Edition with your application. Conducting business 9780596518431 pdf download Japan is pretty easy—once you know the language, 9780596518431 pdf download.
In this 9780596518431 pdf download, the 9780596518431 pdf download is SQL, or Structured Query Language. Originally developed by IBM, SQL has since become a standard across the database industry.
Well, kind of. The core parts of the SQL language are pretty consistent between vendors, but each supplier adds a lot of extra features and syntax variations designed by Edgar Codd wannabes. This section describes those DDL and DML statements that will be most useful in our development of the Library program.
Upper- and lowercase distinctions are ignored; SELECT is the same as select is the same as SeLeCt, 9780596518431 pdf download. Traditional SQL code is mostly uppercase. I use uppercase for all keywords, and mixed case for tables, fields, and other custom items. Whatever you choose, consistency is important. Also, 9780596518431 pdf download, employ whitespace as you see fit.
You can put statements on one gigantic line, or put every word on a separate line. SQL statements normally end with a semicolon, but some tools do not require you to include the semicolon, and other tools require that you exclude it. SQL statements used in Visual Basic code never include semicolons.
Later, when you look at a SQL script I wrote, 9780596518431 pdf download will see the word GO from time to time. This may come as a shock to you, but before you can store any data in a table, you have to create that table. SQL has just the tool to do this: the CREATE TABLE statement, 9780596518431 pdf download. The basic syntax is pretty straightforward:. Table and field names are built from letters and digits; you can include spaces and some other special characters, but it makes for difficult coding later 9780596518431 pdf download. Extensions to the syntax let you set up constraints that apply to the entire table, indexes which let you sort or search a specific column more quicklyand data storage specifics.
The IDENTITY keyword lets SQL Server take charge of filling the RecordID field with data; it 9780596518431 pdf download use a sequential counter to supply a unique RecordID value with each new record. The PRIMARY KEY clause identifies the RecordID field as the unique identifying value for each record in the table. The bigint and smallint data types indicate appropriately sized integer fields, and the varchar type provides space for text, up to the maximum length specified in the parentheses 20 characters.
CustomerID field match the key values from the Customers. CustomerID field. It shows up everywhere in SQL. References between tables are also known as foreign references. If you need to make structure or option changes to a table or its fields after it is created, SQL includes an ALTER TABLE statement that can change almost everything in the table. Additionally, 9780596518431 pdf download, there is a related DROP TABLE statement used to get rid of a table and all of its data. You might want to avoid this statement on live production data, as users tend to get a bit irritable when their data suddenly disappears off the surface of the earth.
Table summarizes the available data types used in SQL Server. Fixed-length binary data, up to 8, bytes in length. You specify the length through a parameter, as in binary Supports three possible values: 10or NULL. Generally used for Boolean values, 9780596518431 pdf download. Internally, SQL Server stores multiple bit fields from a single record in a merged integer field.
Fixed-length standard char or Unicode nchar strings, up 9780596518431 pdf download 8, characters in length. You specify the length through a parameter, as in char A general date and time field for dates ranging from January 1, AD to December 31, AD, 9780596518431 pdf download.
Time accuracy for any given value is within 3. SQL Server adds several new 9780596518431 pdf download data types: date dates without timestime times without datesdatetime2 same as datetimebut with a larger range and accurate to nanosecondsand datetimeoffset date and time ranges, 9780596518431 pdf download.
A fixed-precision and scale decimal field. You specify the maximum number of digits to appear on both sides of the decimal point the precision and the maximum number of those digits that can appear on the right side of the decimal point the scale. For instance, a setting of decimal 10,4 creates a field with up to 10 total digits, 9780596518431 pdf download, four of which may appear after the decimal point.
The maximum precision value is numeric is a synonym for decimalas is dec.
9780596518431 pdf download
Management Studio Express is not included in SQL Server Express Edition; you must download or obtain it separately from Microsoft. As of this writing, it is available at no cost from Microsoft’s web site. Figure SQL Server Management Studio Express. Tip. Because some readers of Programming Visual Basic may only have access to SQL Server Express Edition (and the related 3/6/ · Programming Visual Basic PDF Download Free | Tim Patrick | O'Reilly Media | | | MB | blogger.com Applications with Download Full PDF Package. This paper. A short summary of this paper. 12 Full PDFs related to this paper. READ PAPER. Programming Visual Basic. Download.
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