birt code 128

birt code 128

birt code 128

birt code 128

birt code 128

birt code 128,
birt code 128,
birt code 128,
birt code 128,

birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,

birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,

birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
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birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
birt code 128,
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birt code 128,
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birt code 128,

The ATO can make recommendations to modify the structure (both the syntax and semantics) of poorly performing SQL statements. The ATO considers issues such as the following: Design mistakes; for example, performing full table scans because you didn t create indexes. Using inefficient SQL; for example, the NOT IN construct, which is known to be much slower than the NOT EXISTS construct in general.

The ATO only identifies poorly written SQL, but it won t rewrite it for you. You will know your application better than the ATO, so Oracle only provides advice, which you can implement or not.

Control: Which process is in charge of the interaction Which one is responsible for initiating it Can the interaction be aborted If so, by which process Is one of the processes responsible for monitoring the progress of the interaction Which process decides when the interaction terminates Timing: When sending messages, can the sender wait forever for a response Can the sender continue with other work while waiting for a response Does the sender require a response within a certain time frame Can the receiver accept other messages while processing a prior one Flow: Is information sent in a single exchange, or it is broken down into an iteration of smaller ones If an iterative flow is used, how is the end of the iteration signaled Looking at different kinds of software systems, it becomes apparent that there are recurring ways that processes interact in terms of communication mechanics, assumptions made by the communicating parties, goals of the sender, overall timing, and so on.

Here are some recommendations that the SQL Tuning Advisor will give you: Creating indexes will speed up access paths. Using SQL profiles will allow you to generate a better execution plan. Gathering optimizer statistics for objects that do not have any, or renewing stale statistics, will be of benefit. Rewriting SQL as advised will improve its performance.

You can use the SQL Tuning Advisor through packages or through the web interface of the OEM Database Control.

The main SQL package for tuning SQL statements is DBMS_SQLTUNE. The first example will be creating and managing tasks that tune SQL statements.

I ll call these recurrences interaction patterns, and I ll show that they describe situations that are extremely common, not just in software systems but in everyday life The patterns presented in this chapter are based on a paper I presented at a patterns workshop in the summer of 19981 I ve renamed some patterns to give them a broader characterization In keeping with the conventions adopted by popular patterns handbooks, I ll begin each pattern with a synopsis box, describing the context in which the pattern applies A list of forces follows, describing the system constraints that the pattern must deal with Each pattern has at least two examples, depicting an occurrence in everyday life and in a software system..

You must have the ADVISOR privilege to use the DBMS_SQLTUNE package. Ensure that you do before running any of the following examples.

Here s how to tune SQL statements using the DBMS_SQLTUNE package: 1. Create a task: The CREATE_TUNING_TASK procedure creates a task to tune a single statement or several statements (a SQL tuning set or STS). You can also use a SQL statement (using the SQL identifier) from the AWR or from the cursor cache. In the following example, I show how to create a task using a single SQL statement as input. First, I pass the SQL statement as a CLOB argument, as shown here:

1. Ted Faison, Interaction Patterns for Communicating Processes (proceedings of PLoP98, Pattern Languages of Programs, Monticello, IL, August 1998, http://citeseer.ist.psu.edu/faison98interaction.html).