Download e-book for kindle: Advanced SQL: 1999 - Understanding Object-Relational and by Jim Melton

By Jim Melton

ISBN-10: 0080498841

ISBN-13: 9780080498843

ISBN-10: 1558606777

ISBN-13: 9781558606777

Complicated SQL:1999 - figuring out Object-Relational and different complex positive factors is the practitioner's instruction manual to the standard's complicated good points. it isn't a re-presentation of the normal, yet quite an authoritative, in-depth advisor to its functional software. Like its spouse, SQL:1999 - figuring out Relational Language parts, which defined the standard's uncomplicated good points, this e-book will make it easier to make your functions either potent and standard-compliant.This convenient reference has a modular structure so that you can discover particular subject matters conveniently. it truly is both invaluable to these upgrading from past models of SQL and people without prior event. Written by means of the standard's special editor, complicated SQL:1999 will entire your wisdom and aid your talents like no different booklet can. * Focuses solely at the concerns that topic to programmers who're connecting purposes to databases.* info SQL:1999's item amenities, together with based user-defined kinds, typed tables, user-defined workouts, and regimen invocation.* Examines amenities new to SQL, together with these in terms of online analytical processing (OLAP), administration of exterior info (SQL/MED), and Java support.* Covers the continuing improvement of XML support.* comprises appendices that conceal the SQL:1999 annexes, a SQL:1999 instance utilizing UDTs, prestige codes, and invaluable info at the standardization strategy.

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Additional resources for Advanced SQL: 1999 - Understanding Object-Relational and Other Advanced Features (The Morgan Kaufmann Series in Data Management Systems)

Example text

In that expression, "SQRT(2)" is the syntax for an invocation of the function SQRT to which a single argument, the n u m b e r 2, is passed. In SQL, functions have only input parameters; therefore, you cannot return more t h a n a single value from a function. By contrast, procedures are routines that return values only t h r o u g h parameters. 9 Procedures are typically invoked using some form of "CALL" statement. In SQL, procedures can have b o t h input parameters and o u t p u t parameters (and parameters that are b o t h at once).

Of course, we all recognize that some "things" in the real world are incredibly anonymous, such as the ants in our backyards or the cornflakes in the boxes we purchase at the market. " For now, I'll merely say that a row in a typed table is an instance of the structured type on which the table is defined and that gives the instance a unique identity. Once an instance of a structured type has a unique identity, then it really behaves exactly as an object is expected to behave in an object-oriented environment.

As you'll see, these types--called distinct typesmare permitted, but not required, to have user-defined behaviors, which distinguishes them from the other category of user-defined typesmstructured types~that have only user-defined behaviors. Aside from such restricted types, most of what you'll see called user-defined types (or abstract data types, a phrase once employed in SQL:1999 during its develo p m e n t period) are likely to have some structure associated with them (comparable to the C programming language's struct) and also to have several userdefined functions to provide behaviors of the types.

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Advanced SQL: 1999 - Understanding Object-Relational and Other Advanced Features (The Morgan Kaufmann Series in Data Management Systems) by Jim Melton


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