performance tuning in oracle 11g with examples
Tài liệu Oracle SQL Jumpstart with Examples- P1 docx
Ngày tải lên :
24/12/2013, 12:17
... found in Appendix A. In addition, you can find
the scripts listed on a simple menu on my website at the following URL:
1
www.oracledbaexpert.com /oracle/
OracleSQLJumpstartWithExamples/index.html
... Modeling
Specialized Oracle Database Objects. Clustering, presorting, and
physical preconstruction of data. The objective is to avoid repeating
the same tasks, targeting and tuning hard-hitting ... queries using simple facets of Oracle SQL such as the DUAL
table, DISTINCT, and NULLs.
Chapter 5. Filtering Rows
This chapter looks at filtering using the WHERE clause, including a brief
examination...
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Tài liệu Oracle SQL Jumpstart with Examples- P2 ppt
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24/12/2013, 12:17
... possible in Oracle SQL with respect to SQL coding can
now be coded and executed from within PL/SQL. PL/SQL is now
fully syntactically equivalent with Oracle SQL. In other words, all
Oracle SQL ... top menu and invoke the editor. A window
appears with an editing program and the text of the query you
wrote ready for editing. In Windows, the default editor is Note-
pad. In UNIX, Linux, and other ... features available for SQL in both
Oracle Database 10g and Oracle Database 9i.
1.8 Endnotes
1. www.oracledbaexpert.com /oracle/ secure/Normalization.doc
2. Oracle Performance Tuning for 9i and 10g (ISBN:...
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Tài liệu Oracle SQL Jumpstart with Examples- P3 docx
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24/12/2013, 12:17
... particularly when matching
indexes or, more specifically, attempting to utilize and take advantage
of physical data ordering already available in an index. In Oracle
Database 9i, Oracle Database 10g, ... sorts in order of the second column, the third column,
and the first column. What’s that in English? PLAYING_TIME by TITLE
by RECORDING_DATE or RECORDING_DATE sorted within
TITLE, sorted within PLAYING_TIME.
...
If the column containing null values is being sorted in descending
order, the rows with null values are listed at the beginning.
You can reverse either of these rules by using the NULLS FIRST...
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Tài liệu Oracle SQL Jumpstart with Examples- P4 docx
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24/12/2013, 12:17
... using
scripts and variables.
8.2 Using Scripts and Variables
SQL*Plus supports a simple method of defining and prompting for variables
using ampersand characters (&). Any string beginning with ... once again. Add the following line:
ACCEPT CDNUM PROMPT 'What CD number do you want to see? '
Remove the following lines:
DEFINE CDNUM=9
UNDEFINE CDNUM
Change the following line from:
TTITLE ... formatting, including
headings, titles and form feeding.
PAU[SE]
. This command only works in SQL*Plus and performs the
same type of function as the PAUSE or MORE command in various
operating...
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Tài liệu Oracle SQL Jumpstart with Examples- P5 docx
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24/12/2013, 12:17
... to join tables or
row sets together. Now let’s examine different join types in detail and by
example.
10.3 Examining Different Types of Joins
Let’s examine each type of join in turn using ... remaining func-
tions tend to be obscure and seldom used. In fact, some functions included
in this chapter are obscure. Let’s begin with string functions.
9.2.1 String Functions
The string ... tables as with an inner join but
including rows from one or both tables that do not have matching
rows in the other table. Missing values are replaced with null values.
Left outer join.
All...
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Tài liệu Oracle SQL Jumpstart with Examples- P6 pptx
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24/12/2013, 12:17
... MUSIC schema containing songs on other CDs.
The self-join query following lists SONG_ID values appearing on more
than one CD. Note that the line in the WHERE clause containing the ine-
quality operator ... seen.
Windowing Clause. The windowing clause syntax allows placement
of a window or subset picture onto a set of data, applying analysis to
that data window subset only.
In fact, looking at the ... Denormaliza-
tion performance improvement. Some examples of situations in which
self-joins might be useful would be grouping self-joins or hierarchical
(fishhook) self-joins.
Note: A fishhook is a table with...
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Tài liệu Oracle SQL Jumpstart with Examples- P7 pdf
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24/12/2013, 12:17
... ]]]])
. Replaces a string within a string.
Regular expression functions are much like their relative Oracle built -in
string functions. See Chapter 9 for Oracle built -in string functions.
14.2.2 ... allows flashing back to the state that data was in
at a previous point in time. Oracle Database 9
i
allowed AS OF flashback
queries back to a point in time using a timestamp or SCN. Oracle Database
... let’s look at some simple examples of flashback queries.
13.3.3 Using Flashback Queries
First I add a new row to the CONTINENT table.
INSERT INTO CONTINENT VALUES(CONTINENT_ID_SEQ.NEXTVAL
,...
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Tài liệu Oracle SQL Jumpstart with Examples- P8 docx
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24/12/2013, 12:17
... Pointer Datatypes
A reference pointer datatype is used to point to a point in space. Nothing
Einsteinian is implied; the space exists only somewhere in an Oracle data-
base. The reference pointer ...
324
15.3
Adding Data (INSERT)
15.3 Adding Data (INSERT)
Adding new rows into a table is done with the INSERT command. The
INSERT command can be used to add to a single table or multiple ... little to do with actually “doing things” to XML structures, with Oracle
SQL commands. We want to know the “what” and not the “how.” In other
words, what can we do with XML documents in Oracle SQL,...
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Tài liệu Oracle SQL Jumpstart with Examples- P9 ppt
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24/12/2013, 12:17
... partition containing hash subpartitions
within each range partition.
Range-List. A range partition containing list value subpartitions
within each range partition.
18.3.6.1.1 Partition Indexing
Partitions ... Types
18.3.6 Creating Partitioned Tables
Partitioned tables are part and parcel of an add-on option called Oracle Par-
titioning. Oracle Partitioning working in concert with parallel processing
and separate ... database. The index is shown in Figure 18.6. The query used exam-
ines all of a current user’s indexes and is included in Appendix B.
DROP TABLE INSTRUMENTS;
CREATE TABLE INSTRUMENTS OF INSTRUMENTTYPE
OBJECT...
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Tài liệu Oracle SQL Jumpstart with Examples- P10 docx
Ngày tải lên :
21/01/2014, 18:20
... An inline primary key constraint on the ARTIST_ID column.
An inline NOT NULL constraint on the NAME column.
An inline CHECK constraint named STATE that checks the length
of the STATE_PROVINCE ... are views with joins and views
with inline subqueries.
19.3.3.1 Views with Joins
Let’s dive right in by creating a complex view that displays artist guest
appearances and the instrument ... 20.3 Adding, Modifying, and Dropping Constraints
SONGS table. As shown in Figure 20.11, only the primary key on the
SONGS table remains.
Cascading of constraints can also be applied in the DROP...
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Tài liệu Oracle SQL Jumpstart with Examples- P11 doc
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21/01/2014, 18:20
... tables
in the FROM clause, and the WHERE clause performs the join. Voilà! A
bitmap join index.
Now let’s look into changing and dropping indexes.
21.1.4 Changing and Dropping Indexes
The indexes ... of indexes.
USER_IND_EXPRESSIONS. Contains function-based index
expressions.
USER_JOIN_IND_COLUMNS. Join indexes such as bitmap join
indexes.
USER_PART_INDEXES. Index information at the ... column in the index included in the WHERE clause. Consider
the columns used in the WHERE clauses whenever adding more
indexes to a table.
Skip Scanning Indexes. A new feature introduced in Oracle...
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Tài liệu Oracle SQL Jumpstart with Examples- P12 pptx
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21/01/2014, 18:20
... about changing data from within
PL/SQL blocks.
24.5 Changing Data in PL/SQL
Not only can data in tables be changed from within PL/SQL blocks, but
there are some small additions making coding a little ... RETURNING INTO clause, as shown
in the combined syntax for INSERT, UPDATE, and DELETE commands
in Figure 24.10.
In general. the RETURNING INTO clause can be used to return
expressions used in DML ... to PRINCE using this command:
GRANT MUSIC_ACCESS TO PRINCE WITH ADMIN OPTION;
Granting a role to a user has the same syntax as granting system privi-
leges; therefore, you use the WITH ADMIN OPTION...
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Tài liệu Oracle SQL Jumpstart with Examples- P13 docx
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21/01/2014, 18:20
...
VALUES(INSTRUMENT_ID_SEQ.NEXTVAL,NULL,'String');
INSERT INTO INSTRUMENT(INSTRUMENT_ID,SECTION_ID,NAME)
VALUES(INSTRUMENT_ID_SEQ.NEXTVAL,NULL,'Vocals');
INSERT INTO INSTRUMENT(INSTRUMENT_ID,SECTION_ID,NAME)
VALUES(INSTRUMENT_ID_SEQ.NEXTVAL,NULL,'Wind');
INSERT ... watermark.
574
A.5
INSTRUMENT.SQL
INSERT INTO INSTRUMENT(INSTRUMENT_ID,SECTION_ID,NAME)
VALUES(INSTRUMENT_ID_SEQ.NEXTVAL,NULL,'Guitar');
INSERT INTO INSTRUMENT(INSTRUMENT_ID,SECTION_ID,NAME) ...
VALUES(INSTRUMENT_ID_SEQ.NEXTVAL,NULL,'Wind');
INSERT INTO INSTRUMENT(INSTRUMENT_ID,SECTION_ID,NAME)
VALUES(INSTRUMENT_ID_SEQ.NEXTVAL,NULL,'Orchestra');
INSERT INTO INSTRUMENT(INSTRUMENT_ID,SECTION_ID,NAME)...
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Tài liệu Oracle SQL Jumpstart with Examples- P14 pdf
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21/01/2014, 18:20
... watermark.
Index 647
Index
Semicolon (;), 76
Semi-joins. See Subqueries
Sequences, 489–498
accessing, 490
changing, 493–94
creating, 490–93
cycling, 492
defined, 489
dropping, 493–94
features, 494
in INSERT ... 411
removing, 411–12
renaming, 411
selecting, 55
unused, 411
updating, 332
See also
Rows; Tables
Comments
adding, 416–20
inline, 419–20
multiple-line, 419
for schema objects, 416–19
single-line, ... 292
using, 290–92
Constraints, 447–69
adding, to existing tables, 462–63
ALTER TABLE command and, 461–64
applying, 449
cascading of, 468
check, 449, 456–58
defined, 448
dropping, 465–68
dropping, with...
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Tài liệu Oracle SQL Jumpstart with Examples- P15 docx
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21/01/2014, 18:20
... 411
removing, 411–12
renaming, 411
selecting, 55
unused, 411
updating, 332
See also
Rows; Tables
Comments
adding, 416–20
inline, 419–20
multiple-line, 419
for schema objects, 416–19
single-line, ... 464
renaming, 464–65
states, 463–64
types, 448–49
unique, 448, 451–52
uses, 448–49
USING INDEX clause, 464
Constraint views
creating, 429–30
defined, 427
inserted rows requirement, 431
inserting/updating ... 292
using, 290–92
Constraints, 447–69
adding, to existing tables, 462–63
ALTER TABLE command and, 461–64
applying, 449
cascading of, 468
check, 449, 456–58
defined, 448
dropping, 465–68
dropping, with...
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