By Steven Holzner, Bob Howell
Written for builders who have to wake up to hurry on ADO.NET, this publication covers the ADO.NET item version from begin to end, from database instruments to making facts items, from developing net providers to constructing multi-tier database functions. It additionally covers every little thing from home windows varieties periods and information binding to making ASP.NET net purposes. greater than a reference booklet, the authors mix own event and most sensible practices with sensible how-to wisdom. in contrast to another books, this ebook used to be written utilizing the legitimate liberate of visible Studio.NET specialist, so all examples and code are absolutely modern.
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This differs from a floating-point value that is a real number and has no integral value. A scaled integer is an integer with the decimal point arbitrarily moved to the left a set number of places. • Money A numeric with the decimal point set at position 4. • Float/Real True fractions or real numbers. Used mainly for scientific applications. Do not use reals to store monetary amounts or quantities. Use int or numeric for this. It is possible for two reals with the same apparent value to fail equality tests because they are not really the same number.
The Connection object manages database connections and transactions. • The Command object encapsulates SQL statements and manages access to stored procedures. It contains a Parameters collection to manage passing data into and out of stored procedures. • The RecordSet object holds the results of SQL queries and implements methods for navigating through the rows and for adding, deleting, and updating rows. In its native connected mode, when you update the RecordSet, the results are immediately updated in the underlying database as well.
The last item is Create Clustered. This selection can be applied to only one index per table at a time. This causes SQL Server to sort the actual rows according to the sort order of the index. This speeds up sequential access to the data dramatically, but slows down inserting and updating because SQL Server must insert or move the row into the correct position instead of just appending it to the end of the table. The last item, Do Not Automatically Recompute Statistics, should be left unchecked.
ADO.NET Programming in Visual Basic .NET by Steven Holzner, Bob Howell