Read or Download Oracle 9i SQL Reference (8) PDF
Similar databases books
This e-book brings all the parts of database layout jointly in one quantity, saving the reader the time and rate of constructing a number of purchases. It consolidates either introductory and complicated issues, thereby overlaying the gamut of database layout method ? from ER and UML suggestions, to conceptual information modeling and desk transformation, to storing XML and querying relocating gadgets databases.
Oracle Call Interface. Programmer's Guide
The Oracle name Interface (OCI) is an software programming interface (API) that permits purposes written in С or C++ to engage with a number of Oracle database servers. OCI provides your courses the potential to accomplish the total variety of database operations which are attainable with an Oracle database server, together with SQL assertion processing and item manipulation.
Oracle Warehouse Builder 11g: Getting Started
This easy-to-understand educational covers Oracle Warehouse Builder from the floor up, and faucets into the author's huge adventure as a software program and database engineer. Written in a calm variety with step by step reasons, plenty of screenshots are supplied during the ebook. there are many assistance and valuable tricks all through that aren't present in the unique documentation.
Extra resources for Oracle 9i SQL Reference (8)
Example text
At this point we would like to define a history H to be serializable if it is equivalent to some serial history H,. This would be a perfectly reasonable defi- 32 CHAPTER 2 / SERIALIZABILITY THEORY nition if H were a collzplete history. Otherwise there are problems. First, there is an artificia1 problem in that a partial history can never be equivalent to a serial one. This is because serial histories must be complete by definition, and two histories can be equivalent only if they contain the same set of operations.
Ti,,t is a topological sort of SG(H). Let H, be the serial history Ti, TiL . . Ti,,,. We claim that C(H) E H,. To see this, let pi E Ti and qj E Tj, where T,, Tj are committed in H. Suppose pi, qj conflict and pi The value of x returned by Read(x) depends on whether this operation precedes or follows Write(x). We want to formalize the definition of a transaction as a partial ordering of operations. In mathematics, it is common practice to write a partial order as an ordered pair (C, <), where C is the set of elements being ordered and < is the ordering relation. ), where C, is the set of operations of 7-,and