Oracle Database 12c includes over 500 new features designed to support cloud computing, big data, security, and availability. Key features include support for up to 4096 pluggable databases, hot cloning without placing the source database in read-only mode, sharding capabilities, in-memory column storage, application containers, improved resource management isolation, and AWR support on Active Data Guard databases. Other notable features include enhanced JSON support, data redaction for security, row limits and offsets for queries, invisible columns, SQL text expansion, PL/SQL from SQL, session-level sequences, extended data types up to 32K, multiple indexes on the same columns, READ privileges without row locking ability, session private statistics for global temporary tables,
Oracle Data Redaction is a new feature in Oracle Database 12c that enables protection of data shown to users in real time without requiring application changes. It redacts data using methods like full, partial, random, or regular expression redaction and was backported to Oracle Database 11.2.0.4. The feature is part of the Advanced Security option and helps securely redact sensitive data for different user groups.
Oracle Database 12c New Features for Developers and DBAs - OTN TOUR LA 2015Alex Zaballa
Oracle Database 12c includes over 500 new features designed for cloud computing, big data, security, and availability. Key features include Multitenant architecture which allows multiple databases to share a single database instance, In-Memory which stores frequently accessed data in memory for faster queries, and new security features like data redaction and encryption. Additional features improve performance, manageability, and flexibility of the database like JSON support, heat map statistics, and identity columns.
Oracle Database 12.1.0.2 introduced several new features including approximate count distinct, full database caching, pluggable database (PDB) improvements like cloning and state management, JSON support, data redaction, SQL query row limits and offsets, invisible columns, SQL text expansion, calling PL/SQL from SQL, session level sequences, and extended data types support.
DBA Brasil 1.0 - DBA Commands and Concepts That Every Developer Should KnowAlex Zaballa
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Flex Cluster e Flex ASM - GUOB Tech Day - OTN TOUR LA Brazil 2014Alex Zaballa
The document discusses Oracle Flex Cluster and Flex ASM configurations. A Flex Cluster allows running Oracle databases on hub and leaf nodes, where leaf nodes do not require direct access to storage. It also discusses converting existing clusters to Flex Clusters and Flex ASM. Key aspects covered include the use of Grid Naming Service for Flex Clusters, capabilities of hub and leaf nodes, and enhancements in Flex ASM such as larger LUN size support and password file storage in ASM.
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Oracle Database 12c includes many new tuning features for developers and DBAs. Some key features include:
- Multitenant architecture allows multiple pluggable databases to consolidate workloads on a single database instance for improved utilization and administration.
- In-memory column store enables real-time analytics on frequently accessed data held entirely in memory for faster performance.
- New SQL syntax like FETCH FIRST for row limiting and offsetting provides more readable and intuitive replacements for previous techniques.
- Adaptive query optimization allows queries to utilize different execution plans like switching between nested loops and hash joins based on runtime statistics for improved performance.
This presentation explains all of the new features that are relevant for developers in Oracle 12c. It's been out for a couple of years, but many companies haven't updated to 12c. So, if you're looking to update soon, or are just interested in what the new features are, look at this presentation.
The full post is available at http://www.completeitprofessional.com/oracle-12c-new-features-for-developers
Oracle Database 12c includes many new features across SQL, PL/SQL, database management, partitioning, patching, compression, Data Guard, and pluggable databases. Key features include increased datatype size limits, identity columns, implicit result sets in PL/SQL, adaptive plans, row pattern matching, pluggable databases that can be plugged into and unplugged from container databases, and many enhancements to compression, partitioning, Data Guard, and patching functionality.
Oracle Data Redaction allows protecting data shown to users in real time without changing applications. It applies redaction at query execution through policies that redact selected data. Redaction methods include full, partial, random, and no redaction. While stored data remains unchanged, redaction occurs before results are returned. Data Redaction is available in Oracle Database 11.2.0.4 and later, and is part of the Advanced Security option. It provides an additional layer of security without impacting application functionality.
Design and develop with performance in mind
Establish a tuning environment
Index wisely
Reduce parsing
Take advantage of Cost Based Optimizer
Avoid accidental table scans
Optimize necessary table scans
Optimize joins
Use array processing
Consider PL/SQL for “tricky” SQL
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This presentation gives an overview of the enhancements of Data Pump and Transportable Tablespaces. The following list is an excerpt of the points I will talk about
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- Parallelized import of metadata during a TTS import operation
- Checksum support for dump files
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DBA Commands and Concepts That Every Developer Should KnowAlex Zaballa
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Oracle Data Redaction allows protecting data shown to users in real time without changing applications. It applies redaction at query execution through policies that define which data to redact for which users. Redaction occurs just before returning results and does not alter stored data. Methods include full, partial, random redaction. It introduces minimal overhead but does not prevent privileged users like DBAs from accessing raw data.
The document discusses using Statspack and AWR (Automatic Workload Repository) to analyze SQL performance and identify poorly performing queries. It provides examples of Statspack reports and how to interpret them to find SQL statements that are doing full table scans, experiencing buffer cache misses, or are inefficient due to lack of bind variables. The document also discusses how to identify SQL statements that are causing excessive sorting.
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Oracle Database 12c introduces many new features for developers and DBAs. These include native support for JSON, data redaction capabilities, improved SQL query functionality using row limits and offsets, and new PL/SQL features like calling functions from SQL. The presentation provides demonstrations of these new features.
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Kellyn Pot’Vin-Gorman presented a comparison of indexing in Oracle and SQL Server databases. They loaded test data into indexes in each platform, altered the fill factor/pctfree settings, and measured performance of data loads, updates, deletes and index storage. SQL Server exhibited page splits when indexes became fragmented, while Oracle showed leaf block splits. Rebuilding indexes with high pctfree in Oracle had significantly worse performance than rebuilding with lower fillfactor in SQL Server. Overall, Oracle generally outperformed SQL Server for indexing and was less prone to fragmentation issues.
DBA Brasil 1.0 - DBA Commands and Concepts That Every Developer Should KnowAlex Zaballa
This document summarizes a presentation on DBA commands and concepts that every developer should know. The presentation covers topics such as:
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- Leveraging parallelism to improve query performance
- Using Flashback Query and Flashback Table to view and recover past data
- Performing table recovery with RMAN
- Managing database schemas and statistics
- Implementing security with Virtual Private Database
This document provides an overview of new features in SQL Server 2005, including SQLCLR which allows writing functions, procedures and triggers in .NET languages. It discusses how to install and debug SQLCLR assemblies, and create user-defined data types and aggregates that can extend the functionality of SQL Server. Key enhancements to T-SQL are also summarized, such as common table expressions, ranking commands, and exception handling.
This document discusses SQLcl, a command line interface similar to SQL*Plus but built in Java. It summarizes key features of SQLcl including how to install it, command line editing capabilities, formatting query output, defining aliases for SQL and PL/SQL, and calling PL/SQL functions from SQL queries more efficiently in Oracle 12c and beyond by defining functions using subquery factoring or the PRAGMA UDF.
This is one of the 15 minute "TED" style talk presented as part of the Database Symposium at the ODTUG Kscope18 conference. In this presentation @SQLMaria shares details on 4 useful supplied PL/SQL package with the Oracle Database
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Tony Jambu (obscure) tools of the trade for tuning oracle sq lsInSync Conference
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Exploring plsql new features best practices september 2013Andrejs Vorobjovs
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OTN TOUR 2016 - DBA Commands and Concepts That Every Developer Should KnowAlex Zaballa
The document provides an overview of DBA commands and concepts that every developer should know. It includes sections on availability of Oracle Database 12c, parallel queries, row chaining and migration, explain plans, Oracle Flashback Query and Table, schema management, rollbacks, pending statistics, bulk processing vs row-by-row, Virtual Private Database, extended data types, SQL text expansion, identity columns, and virtual columns. The presentation aims to help developers better understand database administration tasks and functionality.
This document provides an overview of some of the key differences between SQL Server and Oracle databases. It discusses differences in syntax for common SQL statements like joins, subqueries, deletes and data types. It also covers conceptual differences like the connect concept in Oracle and powerful new features in Oracle like regular expressions. The document is intended as a light introduction for SQL Server users moving to Oracle.
This document provides an overview of some of the key differences between SQL Server and Oracle databases. It discusses differences in syntax for common SQL statements like joins, subqueries, deletes and inserts. It also covers conceptual differences like the database/schema structure and data types. The document provides examples to illustrate equivalent syntax between the two database platforms.
Performance tuning involves improving the performance of computer systems, typically databases. It involves identifying high load or inefficient SQL statements, verifying execution plans, and implementing corrective actions. Tuning goals include reducing workload through better queries and plans, balancing workload between peak and off-peak times, and parallelizing workload. High load statements can be identified through SQL tracing tools, and TKProf can analyze trace files to identify top SQL and plans.
This document summarizes a comparison of indexing between Oracle and SQL Server databases. It describes how indexes are structured differently in each platform, with Oracle using PCTFREE to control free space in blocks and SQL Server using FILLFACTOR. Tests were conducted inserting and deleting data in each to observe how indexes are impacted. The results showed that Oracle indexes were less affected by fragmentation while SQL Server indexes experienced more page splits leading to fragmentation issues. Maintaining indexes also differed, with SQL Server potentially facing more challenges with its clustered index structure.
Oracle goldengate 11g schema replication from standby databaseuzzal basak
GoldenGate can replicate database schemas between an Oracle source and target database. It was configured to replicate the SCOTT schema from a source Oracle 11gR2 database in standby mode to a target Oracle 11gR2 database. The key steps included enabling supplemental logging on the source, setting up the GoldenGate user and processes on both databases, and defining the extract, pump and replicate processes to copy data and DDL changes from the source to the target schema.
07 Using Oracle-Supported Package in Application Developmentrehaniltifat
This document discusses using Oracle-supplied packages for application development. It describes the UTL_MAIL package for managing email, including procedures for sending messages with and without attachments. It also covers the DBMS_SCHEDULER package for automating jobs, including how to create, run, stop, and drop jobs. Finally, it discusses dynamic SQL and executing SQL statements programmatically using native dynamic SQL statements or the DBMS_SQL package.
SQL Server is a relational database management system developed by Microsoft that supports the SQL language. It has various editions like Enterprise, Standard, and Web. SQL Server allows running multiple instances of the same version on a single machine for benefits like installation of different versions, maintenance of environments, and reducing temporary problems. Key features include creating, altering, and dropping databases and tables. Data can be manipulated using insert, update, and delete commands. Primary keys, foreign keys, unique constraints, and indexes can be defined to enforce data integrity and improve query performance.
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3. Worked for 7 years in Brazil as an Oracle Developer.
2000 - 2007
Worked for 8 years in Angola as an Oracle DBA
for the Ministry of Finance.
2007 - 2015
9. “With more than 500 new features, Oracle
Database 12c is designed to give Oracle
customers exactly what they’ve told us they
need for cloud computing, big data, security,
and availability.”
10. Oracle Announces Beta Availability of Oracle Database 12c Release 2 - Oct 26,
2015
• PLUGGABLE DATABASES
From 252 to 4096
• HOT CLONING
Don’t need to put the source in read-only for cloning
• SHARDING
It’s like partitioning in a shared nothing database
The data is split into multiple databases
• In-Memory
In-Memory column Store on Active Data Guard
Heat Map
• APPLICATION CONTAINER
Pluggable Databases will share application objects
• More isolation, resource manager will limit the memory in addition to CPU and I/O.
• AWR will work on Active Data Guard Database: you can tune your reporting database
11. Availability of Oracle Database 12.2
Source: https://blogs.oracle.com/UPGRADE/entry/oracle_database_12_2_just
14. JSON
OTN Article by Alex Zaballa
http://www.oracle.com/technetwork/pt/articles
/sql/json-oracle-database-12c-2378776-
ptb.html
15. JSON
• Oracle Database 12.1.0.2 has now native
support for JSON.
• “JSON (JavaScript Object Notation) is a
lightweight data-interchange format. It is easy
for humans to read and write. It is easy for
machines to parse and generate.”
Source: http://json.org/
19. Data Redaction
OTN Article in English by Alex Zaballa
http://www.oracle.com/technetwork/articles/d
atabase/data-redaction-odb12c-2331480.html
20. Data Redaction
• One of the new features introduced in Oracle
Database 12c
• Part of the Advanced Security option
• Enables the protection of data shown to the
user in real time, without requiring changes to
the application
25. SQL Query Row Limits and Offsets
create table tabela_teste (id number, name varchar2(20), salary number);
insert into tabela_teste values (1,'Alex' ,100);
insert into tabela_teste values (2,'Joao' ,200);
insert into tabela_teste values (3,'Maria' ,300);
insert into tabela_teste values (4,'Pedro',400);
insert into tabela_teste values (5,'Paulo',500);
insert into tabela_teste values (6,'Fernando',600);
insert into tabela_teste values (7,'Rafael',700);
insert into tabela_teste values (8,'Samuel',700);
insert into tabela_teste values (9,'Daniel',800);
insert into tabela_teste values (10,'Luciano',1000);
26. SQL Query Row Limits and Offsets
Top-N Queries – Pré 12c
select * from ( select id, name, salary
from tabela_teste
order by salary desc)
where rownum <= 5;
27. SQL Query Row Limits and Offsets
select id, name, salary
from tabela_teste
order by salary desc
FETCH FIRST 5 ROWS ONLY;
28. SQL Query Row Limits and Offsets
select id, name, salary
from tabela_teste
order by salary
FETCH FIRST 30 PERCENT ROWS ONLY;
29. SQL Query Row Limits and Offsets
select id, name, salary
from tabela_teste
order by salary desc
OFFSET 2 ROWS FETCH NEXT 2 ROWS ONLY;
31. Invisible Columns
CREATE TABLE tabela_teste
(
coluna1 NUMBER,
coluna2 NUMBER,
coluna3 NUMBER INVISIBLE,
coluna4 NUMBER
);
SQL> desc tabela_teste
Name
-----------------------------------------
COLUNA1 NUMBER
COLUNA2 NUMBER
COLUNA4 NUMBER
32. Invisible Columns
INSERT INTO tabela_teste
(coluna1,coluna2,coluna3,coluna4) VALUES
(1,2,3,4);
INSERT INTO tabela_teste VALUES (1,2,4);
33. Invisible Columns
SET COLINVISIBLE ON
SQL> desc tabela_teste
Name
-----------------------------------------
COLUNA1 NUMBER
COLUNA2 NUMBER
COLUNA4 NUMBER
COLUNA3 (INVISIBLE) NUMBER
39. PL/SQL From SQL
with
function Is_Number
(x in varchar2) return varchar2 is
Plsql_Num_Error exception;
pragma exception_init(Plsql_Num_Error, -06502);
begin
if (To_Number(x) is NOT null) then
return 'Y';
else
return '';
end if;
exception
when Plsql_Num_Error then
return 'N';
end Is_Number;
select rownum, x, is_number(x) is_num from t;
41. Session Level Sequences
Session level sequences are used to produce
unique values in a session. Once the session
ends, the sequence is reset.
Generating Primary Keys for a Global Temporary
Table would be a field where those kinds of
sequences could be used.
45. Extended Data Types
SQL> create table tabela_teste(campo01
varchar2(4001));
*
ERROR at line 1:
ORA-00910: specified length too long for its
datatype
46. Extended Data Types
- VARCHAR2 : 32767 bytes
- NVARCHAR2 : 32767 bytes
- RAW : 32767 bytes
47. Extended Data Types
SHUTDOWN IMMEDIATE;
STARTUP UPGRADE;
ALTER SYSTEM SET max_string_size=extended;
@?/rdbms/admin/utl32k.sql
SHUTDOWN IMMEDIATE;
STARTUP;
**Once you switch to extended data types you can't switch back
49. Multiple Indexes on the same set of
Columns
Pre 12c:
ORA-01408: such column list already indexed
error.
50. Multiple Indexes on the same set of
Columns
Is the ability to create more than one index on
the same set of columns in 12c.
**Only one of these indexes can be visible at a
time
51. Multiple Indexes on the same set of
Columns
Why would you want to do that?
• Unique versus nonunique
• B-tree versus bitmap
• Different partitioning strategies
53. READ Object Privilege and READ ANY
TABLE System Privilege
What is the difference to SELECT and SELECT
ANY TABLE?
54. READ Object Privilege and READ ANY
TABLE System Privilege
SELECT and SELECT ANY TABLE provides the
ability to lock rows:
LOCK TABLE table_name IN EXCLUSIVE MODE;
SELECT ... FROM table_name FOR UPDATE;
55. READ Object Privilege and READ ANY
TABLE System Privilege
SQL> grant select on scott.emp to teste;
Grant succeeded.
SQL> lock table scott.emp in exclusive mode;
Table(s) Locked.
56. READ Object Privilege and READ ANY
TABLE System Privilege
SQL> grant read on scott.emp to teste;
Grant succeeded.
SQL> lock table scott.emp in exclusive mode;
lock table scott.emp in exclusive mode
*
ERROR at line 1:
ORA-01031: insufficient privileges
58. Session private statistics for Global
Temporary Tables
Pre 12c, statistics gathered for global temporary
tables (GTTs) were common to all sessions.
59. Session private statistics for Global
Temporary Tables
BEGIN
DBMS_STATS.set_global_prefs (
pname => 'GLOBAL_TEMP_TABLE_STATS',
pvalue => 'SHARED');
END;
/
BEGIN
DBMS_STATS.set_global_prefs (
pname => 'GLOBAL_TEMP_TABLE_STATS',
pvalue => 'SESSION');
END;
/
60. Session private statistics for Global
Temporary Tables
BEGIN
dbms_stats.set_table_prefs('SCOTT','GTT_TESTE','G
LOBAL_TEMP_TABLE_STATS','SHARED');
END;
BEGIN
dbms_stats.set_table_prefs('SCOTT','GTT_TESTE','G
LOBAL_TEMP_TABLE_STATS','SESSION');
END;
62. Temporary Undo
Global Temporary Tables (GTT) hold the data in a
temporary tablespace. The data in GTTs are either
deleted after commit or kept until the session is
connected depending of the definition of the
GTT.(ON COMMIT PRESERVE OR DELETE ROWS ).
DMLs in a Global Temporary Tables do not generate
REDO, but generate UNDO and this will result in
REDO generating.
65. Statistics During Loads
The ability to gather statistics automatically
during bulk loads:
- CREATE TABLE AS SELECT
- INSERT INTO ... SELECT into an empty table
using a direct path insert
67. Partial Indexes for Partitioned Table
• You can create local and global indexes on a
subset of the partitions of a table, enabling
more flexibility in index creation.
• This feature is not supported for unique
indexes, or for indexes used for enforcing
unique constraints.
72. SQL*Loader Express
[oracle@oracle01 tmp]$ sqlldr teste/teste TABLE=EMPRESA
SQL*Loader: Release 12.1.0.1.0 - Production on Sat Jan 11 12:16:28 2014
Copyright (c) 1982, 2013, Oracle and/or its affiliates. All rights reserved.
Express Mode Load, Table: EMPRESA
Path used: External Table, DEGREE_OF_PARALLELISM=AUTO
Table EMPRESA:
9 Rows successfully loaded.
Check the log files:
EMPRESA.log
EMPRESA_%p.log_xt
for more information about the load.
77. Limit the PGA
SQL> show parameter pga
NAME TYPE VALUE
-------------------------- ------------- ----------------------
pga_aggregate_limit big integer 2G
78. Limit the PGA
PGA_AGGREGATE_LIMIT is set to the greater of:
- 2 GB (default value)
- 200% of PGA_AGGREGATE_TARGET
- 3 MB times the PROCESSES parameter
79. Full Database Caching
Can be used to cache the entire database in
memory. It should be used when the buffer
cache size of the database instance is greater
than the whole database size.
80. RMAN Table Recovery in 12c
RMAN enables you to recover one or more
tables or table partitions to a specified point in
time.
81. RMAN Table Recovery in 12c
RMAN> RECOVER TABLE HR.REGIONS
UNTIL TIME "TO_DATE('01/10/2013
09:33:39','DD/MM/RRRR HH24:MI:SS')"
AUXILIARY DESTINATION '/tmp/backups'
82. In-Database Archiving
SQL> create table tabela_teste(coluna1 number)
row archival;
insert into tabela_teste values(1);
insert into tabela_teste values(2);
insert into tabela_teste values(3);
86. Heat Map, Automatic Data
Optimization and ILM
OTN Article in Portuguese by Daniel Da Meda and Alex Zaballa
http://www.oracle.com/technetwork/pt/articles
/database-performance/ilm-e-automatic-data-
optimization-2601873-ptb.html
87. Heat Map, Automatic Data
Optimization and ILM
• Heat Map: Oracle Database 12c feature that stores system-
generated data usage statistics at the block and segment
levels. Automatically tracks modification and query
timestamps at the row and segment levels.
• Automatic Data Optimization (ADO): automatically moves
and compresses data according to user-defined policies
based on the information collected by Heat Map
• ILM: Heat Map and Automatic Data Optimization make
Oracle Database 12c ideal for implementing ILM
88. Heat Map, Automatic Data
Optimization and ILM
Enabling Heat Map
SQL> alter system set heat_map = on;
89. Heat Map, Automatic Data
Optimization and ILM
Heat Map statistics can be viewed graphically
through EM Cloud Control:
90. Heat Map, Automatic Data
Optimization and ILM
Creating ADO policies
Compress the tablespace USER_DATA and all its residing
segments at OLTP level after 30 days of low access:
ALTER TABLESPACE USER_DATA ILM ADD POLICY
ROW STORE COMPRESS ADVANCED
SEGMENT AFTER 30 DAYS OF LOW ACCESS;
91. Heat Map, Automatic Data
Optimization and ILM
Creating ADO policies
Compress the table ORDER_ITEMS including any
SecureFile LOBs at OLTP level after 90 days of no
modification:
ALTER TABLE ORDER_ITEMS ILM ADD POLICY
ROW STORE COMPRESS ADVANCED
GROUP AFTER 90 DAYS OF NO MODIFICATION;
107. In-Memory
Alter table hr.EMPLOYEES inmemory;
ALTER TABLE sales MODIFY PARTITION SALES_Q1_1998
NO INMEMORY;
ALTER TABLE sales INMEMORY NO INMEMORY(prod_id);
CREATE TABLESPACE tbs_test
DATAFILE '+DG01 SIZE 100M
DEFAULT INMEMORY;