By Thomas Kyte
This specific signature variation incorporates a CD that features a searchable PDF model of the publication and a pattern bankruptcy from the imminent 10 g version as a way to be published in fall 2005.
This is still the defining ebook at the older eight i Oracle database while you are a developer or DBA who works with Oracle-driven database purposes. you'll stumble upon knowledge on designing, constructing, and administering those purposes from one of many world's most effective Oracle specialists, Thomas Kyte.
The ebook covers each vital function and serve as of the eight i model of Oracle, and it's precise within the technical intensity and perception that it offers on every one subject. This booklet will provide help to expertly application with the database and make the most its function set successfully. the outcome: you are going to construct quickly, powerful, scalable, and safe Oracle applications.
Read Online or Download Expert Oracle, Signature Edition Programming Techniques and Solutions for Oracle 7.3 through 8.1.7 PDF
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Extra info for Expert Oracle, Signature Edition Programming Techniques and Solutions for Oracle 7.3 through 8.1.7
There is more than one way to to configure the AUTOTRACE facility. These are the steps that I use: • cd [ORACLE_HOME]/rdbms/admin • l o g into S Q L * P L U S as SYSTEM • run © u t l x p l a n • run CREATE PUBLIC SYNONYM PLAN_TABLE FOR PLAN_TABLE ; • run GRANT ALL ON PLAN_TABLE TO PUBLIC ; If you wish, y o u can replace the GRANT. . TO PUBLIC with a GRANT to a specific user. By granting the privelege to the PUBLIC role, you are effectively letting anyone trace using SQL*PLUS. This is not a bad thing in my opinion as it prevents each and every user from having to install their own plan table.
S q l script that I used for all examples in this b o o k is as follows: define _editor=vi set serveroutput on size 1000000 set set set set trimspool on long 5000 linesize 100 pagesize 9999 Setting Up column plan_plus_exp format a80 column global_name new_value gname set termout off select lower(user) || || decode (global_name, 1ORACLE8 . 0', 1ORA81. WORLD' , '8i', global_name ) global_name from global_name; set sqlprompt '&gname> 1 set termout on Where: • DEFINE EDITOR=VI sets the default editor for SQL*PLUS.
This query is compiled once and then the query plan is stored in a shared p o o l (the library cache), from which it can be retrieved and reused. The difference between the two in terms of performance and scalability is huge, dramatic even. From the above description it should be fairly obvious that parsing a statement with hard-coded variables (called a hard parse) will take longer and consume many more resources than reusing an already parsed query plan (called a soft parse). What may not be so obvious is the extent to which the former will reduce the number of users your system can support.