Oracle SQL Internals Handbook phần 4 docx

... a performance improvement factor is typically associated 48 Oracle SQL Internals Handbook Trees in SQL CHAPTER 5 Trees in SQL: Nested Sets and Materialized Path Relational databases ... structure is: create table emp ( ename varchar2(100), mgrname varchar2(100) ); 44 Oracle SQL Internals Handbook Each record of the emp table identified by ename is re...

Ngày tải lên: 08/08/2014, 20:21

... of SQL tuning, and they don't require a through understanding of the internals of Oracle SQL. Let's begin with an overview of the Oracle SQL optimizers. 74 Oracle SQL Internals Handbook ... Internals Handbook Oracle SQL Tuning Tips CHAPTER 7 SQL tuning Oracle SQL tuning is a phenomenally complex subject, and entire books have been devoted t...

Ngày tải lên: 08/08/2014, 20:21

... SIZE (MB) BUILD TIME (mi:ss) T1 845 16:12 I1 (sex) 11 1:39 I2 (eyes) 16 1 :43 I2 (hair) 37 2:17 I4 (town) 40 2:25 I5 (age) 42 2:28 I6 (work) 45 2 :42 T1 845 16:12 Note particularly the ... column with 640 different values hardly seems to qualify, at first sight, for the description of "low distinct cardinality." 96 Oracle SQL Internals Handbook Refere...

Ngày tải lên: 08/08/2014, 20:21

... table. In Oracle 9i we use table function instead: 2 Oracle SQL Internals Handbook Environment 148 The Tests 148 Java: 149 PL /SQL: 149 Multiple Statements 149 Java: 149 PL /SQL: ... vs. PL /SQL: Where Do I Put the SQL? by Dave Moore 143 The Power of a Package 144 The Flexibility of Java 146 Performance 147 vi Oracle SQL Internals Handbook...

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... order by 4, 2; SID PARSE_CNT CACHE_CNT PCT 150 261 38 14. 55 175 85 19 22.35 12 710399 344 762 48 .53 28 2661 146 9 55.2 107 62762 3 648 7 58.13 236 510 339 66 .47 205 37379 249 81 66.83 ... 3 32 (a=1 or b=1) and (y=3 or z=1) AND 2 49 z=3 and y>7 61 64 y>7 53 56 z=3 46 49 x=5 38 41 c=1 28 31 z=1 21 24 y=3 11 14 b=1 4 7 a=1 How would we...

Ngày tải lên: 08/08/2014, 20:21

... decision. 34 Oracle SQL Internals Handbook SQL, reduce the overheads, and allow you greater flexibility in testing, manipulating and installing stored outlines. 30 Oracle SQL Internals Handbook ... settable at both index and session level, allow even more 36 Oracle SQL Internals Handbook SQL Tuning Using dbms_stats CHAPTER 4 Query Tuning Using DBMS...

Ngày tải lên: 08/08/2014, 20:21

... Oracle SQL Internals Handbook References Oracle 9i Release 2 Datawarehousing Guide, Chapter 17. Oracle 9i Release 2 Supplied Types and PL /SQL packages, Chapter 90 (DBMS_xplan). $ORACLE_ HOME/rdbms/admin ... skip scans, and btree to bitmap conversions. References Oracle 9i Release 2 Datawarehousing Guide, Chapter 6. 1 04 Oracle SQL Internals Handbook...

Ngày tải lên: 08/08/2014, 20:21

... completely. Figure 4 gives the definition for this index: Figure 4: Creating a more subtle bitmap join index. 1 24 Oracle SQL Internals Handbook Embedding SQL in Java & PL /SQL CHAPTER ... V_192216 243 _F_5_E_9_9_0 The problem of incomprehensibility can be addressed by running script otrcsyn .sql in directory $ORACLE_ HOME/otrace/demo. 138 Oracle S...

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... specify parameters in the PreparedStatement SQL string, but not in a Statement SQL string. Single statement: 148 Oracle SQL Internals Handbook SQL with Keyword Searches CHAPTER 15 Keyword ... JAVA ORACLE PACKAGE Single statement 286 113 Multiple statements 1662 506 TRUNCATE 217 332 152 Oracle SQL Internals Handbook Matrix Transposition in Oracle...

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... user_outline_hints 24, 78, 81, 83, 84 user_outlines 24 user_source 20 V v$event_name 1 34 v$session_wait 132 v $sql_ plan 65, 70, 116 v $sql_ plan_statistics 70 v $sql_ plan_statistics_all . 70 v$sqlarea ... 117 oracle_ trace_collection_ name 135 depth-first convergence point 52, 56 oracle_ trace_collection_ path 135 F oracle_ trace_collection_size 135 filter_predicate...

Ngày tải lên: 08/08/2014, 20:21