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For example, when displaying product information we likely want to list each product s corresponding category and supplier s names. All of the SQL gurus I ve talked to have said roughly the same thing, that it doesn t really matter performance-wise as SQL Server will produce roughly identical execution plans.

Second, change the Object Data Source s table, causing the delete to fail.In this tutorial we compare correlated subqueries and the JOIN syntax before looking at how to create a Table Adapter that includes a JOIN in its main query.With relational databases the data we are interested in working with is often spread across multiple tables. Supplier ID s and correlated subqueries can both be used to retrieve related data from other tables, many developers are left scratching their heads and wondering which approach to use.It merits noting that after imparting this advice these experts immediately express their preference of s over correlated subqueries. The brittleness of the Table Adapter s auto-generated stored procedures and re-run the Table Adapter Configuration wizard without having to fear that the stored procedures will be modified.When building a Data Access Layer using Typed Data Sets, the tools work better when using subqueries. Over the next several steps we will create a Table Adapter that, initially, uses a main query that omits any that returns additional columns from related tables.The second value in each row is 49 because that is the identification number for the supplier, Superior Coffee.The last two values, the entries for the columns , which sends only one command and returns a single update count. )"); String(1, "Amaretto"); Int(2, 49); Float(3, 9.99); Int(4, 0); Int(5, 0); Batch(); String(1, "Hazelnut"); Int(2, 49); Float(3, 9.99); Int(4, 0); Int(5, 0); Batch(); // ...Today we're a full service provider, offering V-Colo virtual private servers (VPS), mailboxes and other email services, assorted domain services, web hosting, real and virtual colocation, Internet access (T3s, T1s, SDSL, ADSL, and national dialup), and web programming and network consulting services.We also specialize in Unix shell access, from anywhere on the Internet, anywhere in the world.In cases where the value is treated as a string anyway, there is no drawback.Furthermore, if you want an application to retrieve values of any standard SQL type other than SQL3 types, use the are the name of the coffee and its price, respectively.

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