Yes, there is Oracle SQL Developer, which is maintained by Oracle. Oracle SQL Developer is a free graphical tool for database development. With SQL Developer, you can browse database objects, run SQL statements and SQL scripts, and edit and debug PL/SQL statements. Oracle Database 11g Express Edition is a free program that provides a browser-based interface to administer databases.
Looking for a best RDBMS (Relational Database Management System) then download Oracle 11g Free Full version from Softvela. Several new features and updates makes it different from the oracle 10g version which was a really big hit by this company. The Complete standalone and offline setup of 11g Oracle version ISOis given at the end of this review which is completely compatible with 32 Bit as well 64 Bit operating system. Let’s explore some of the awesome features and updates it brings.
Technical Details for Oracle 11g ISO Download Version:
Complete Overview of Oracle 11g download ISO Version:
This is one of the most successful hit after the release of 10g version, if you have already tested that version then you may be aware of what means by “G” word. If you don’t know then “G” word means the Grid Computation as todays world data is processed in the forms of grids. So this whole database system is relational based system which means that all of your data will be stored in the tables and grids. Because for the purpose of fast performance and small sizes for huge data.
If you are currently running the small to medium type of corporation then you might need database. I will certainly advice you to setup your database with the oracle because it is way more secure than other databases in the market today like mongodb etc. New Tools are present for those who are quite new in the business of making databases. With the usage of those feature you can make some advance type of database where there will be no compromise in the database as well in their security.
In the fast all the databases stored their data in the form of a tree like structures where every node or item will be depended over other one. There are so many disadvantages for those system and most of the time those systems may crash because of the poor backend implementation. With the RDBMS you are accessing and storing all of your data in the tables. These tables are then stored in your databases, as the database is the combination of all these tables. They form a relation which is completely logical.
Oracle SQL Developer:
Oracle SQL developer is one of the latest feature for all the developers and makers of databases from the fast few decades. With the help of this you can manage and direct all the queries coming from the client side as well from the employees side. The command windows is just aweomse from the previous version. There are some shortcuts available in the help list as well. Please check it out from the official site.
Automatic Maintenance Task Management:![]()
With the help of this feature you will be able to maintain all the tasks at one place. Remember that you can manage their time, space and size as well. Some of them are to be given some specific time interval for their processing. With this feature you can allocate the CPU time to different resources available on the server as well. Some kind of dynamic features are present in the latest version. Go For Photoshop CS6 Portable Extended OROracle Windows Server 2016 ISO
You will explore the automatic diagnostic respiratory system which is one of the hottest feature in the 11g version. There are some new algorithms being implemented in this version for making it more secure and stable. You will experience that this system have the ability to store and organize the error diagnostic data and trace files from the servers. Note that all of your data and files are places at one special location.
More Features to explore:
You can also limit all of your employees from getting them enter to the server or database for making them to some kind of amendment in the data. In fact you can automate a function to be executed whenever there are some kind of amendment in the DB data. The Configuration manager will let you manage all of your access algorithms and data safe and configured as well.
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Systems Requirements for this Software:
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This section describes the storage structures of your database, and explains how to monitor and manage the amount of storage that is in use and available for the database and its backups. It contains the following topics:
About the Database Storage Structures
Oracle Database Express Edition (Oracle Database XE) is composed of the following storage structures:
Oracle Database XE completely automates the management of its logical and physical structures and flash recovery area storage. You use the Oracle Database XE graphical user interface to monitor these structures, mostly to understand how much storage your applications have used so far, how much free storage remains, and whether more space is needed for backups.
The following sections provide a closer look at the database and its storage structures. Refer to Figure 6-1 as you review these sections.
Figure 6-1 Database Storage Structure
Description of 'Figure 6-1 Database Storage Structure' Database
The database is the collection of logical and physical structures that together contain all the data and metadata for your applications. The database also contains control structures (such as control files) that it needs for startup and operation. All of these structures are described in subsequent sections, and are summarized in Figure 6-1.
The Oracle Database XE instance (which consists of the Oracle Database XE background processes and allocated memory) works with a single database only. Rather than enabling you to create multiple databases to accommodate different applications, Oracle Database XE uses a single database, and accommodates multiple applications by enabling you to separate data into different schemas. See 'About User Accounts' for more information about schemas.
The maximum database size in Oracle Database XE is 5 gigabytes (GB). This includes between 0.5 and 0.9 GB for the data dictionary, internal schemas, and temporary space, which leaves just over 4.0 GB for user data.
See Also:
See 'Internal User Accounts' for information about internal schemas, and 'Tablespaces' for information about temporary space.
Tablespaces
A database consists of one or more tablespaces. A tablespace is a logical grouping of one or more physical datafiles or tempfiles, and is the primary structure by which the database manages storage.
There are various types of tablespaces, including the following:
Table 6-1 describes the tablespaces included in Oracle Database XE.
Table 6-1 Tablespaces and Descriptions
Note:
You can create additional permanent tablespaces in Oracle Database XE, although typically there is no need to do so. One situation where you may have to create new permanent tablespaces is if you are importing objects from another Oracle database and the import file specifies tablespace names. See the CREATE TABLESPACE command in Oracle Database SQL Language Reference, and 'Exporting and Importing Data' for more information.
Datafiles and Tempfiles
Datafiles are the operating system files that hold database data. The data is written to these files in an Oracle-proprietary format that cannot be read by programs other than an Oracle database. Tempfiles are a special class of datafiles that are associated only with temporary tablespaces. Temporary tablespaces provide workspaces to help process queries.
Control File
The control file is a binary file that tracks the names and locations of the physical components of the database, and that maintains other control information, including records of all database backup-related files. It is essential to the functioning of the database.
Server Parameter File
The server parameter file (
SPFILE ) contains initialization parameters that Oracle Database XE uses at startup to determine the settings and run-time resources for the database. Do not attempt to edit this file with a text editor, as it is a binary file. You can change initialization parameter values by submitting ALTER SYSTEM commands with the SQL Command Line. See Oracle Database SQL Language Reference for more information.
You can view current initialization parameter settings with SQL Developer: in the Reports navigator, expand Data Dictionary Reports and then Database Administration, and see the reports under Database Parameters. Reports are available for All Parameters and Non-Default Parameters (the latter identified as 'Modified' in the Parameters display available from the XE Database Home Page), and each report indicates whether each parameter is Session Modifiable and System Modifiable.
Password File
Oracle Database XE uses a password file to authenticate a user who is logging in remotely as user
SYS . The SYS user can then perform administrative functions from a remote workstation. The password file contains the SYS password (encrypted). Whenever you change the password for SYS , the password file is automatically updated.
The password file is automatically created when you install Oracle Database XE. Unlike the other physical structures of the database, the password file is not backed up to the flash recovery area.
Note:
Under typical circumstances, you should never log in to Oracle Database XE as user SYS .
Recovery-Related Structures in the Flash Recovery Area
The flash recovery area is essential for data protection in Oracle Database XE. It is a directory, separate from the database itself, where recovery-related structures are stored. These recovery-related structures include:
The database automatically manages all contents of the flash recovery area. You must not directly manipulate files within the flash recovery area using operating system commands.
Table 6-2 lists the default location for the flash recovery area on each platform.
Table 6-2 Flash Recovery Area Default Locations
Caution:
The default configuration of Oracle Database XE stores the flash recovery area on the same disk as your database files. In this configuration, if a media (disk) failure occurs, you can lose both your database and your backups. For any database where data protection is essential, change the location of the flash recovery area so that it is stored on a different disk. See 'Setting Flash Recovery Area Location and Size' for instructions.
Online Redo Log Files
The most crucial structure for database recovery is a set of redo log files. This set of files is collectively known as the redo log for the database. A redo log is made up of redo entries, which are also called redo records.
The primary function of the redo log is to record all changes made to data in the database. If an Oracle instance failure or operating system failure prevents modified data from being permanently written to the datafiles, the changes can be recovered from the redo log so that committed data updates are not lost.
The database writes to the redo log files in a circular fashion. When the current redo log file fills, the database begins writing to the next available redo log file. (The redo log files that are not current are called inactive.) When the last available redo log file is filled, the database returns to the first redo log file and writes to it (overwriting previous redo entries), starting the cycle again.
Multiplexed Redo Log
To protect against a failure involving the redo log itself, Oracle Database XE allows a multiplexed redo log, meaning that two or more identical copies of the redo log can be automatically maintained in separate locations. For the most benefit, these locations should be on separate disks. Even if all copies of the redo log are on the same disk, however, the redundancy can help protect against I/O errors, file corruption, and so on.
Multiplexing is implemented by creating groups of redo log files. A group consists of a redo log file and its multiplexed copies. Each identical copy is said to be a member of the group. When the database writes to the current log file, all members in that log file's group are updated so that they remain identical. Each redo log group is defined by a number, such as group 1, group 2, and so on.
The current and inactive redo log files—that is, the current and inactive log groups and all their members—taken together, are called the online redo log files, to distinguish them from archived redo log files, which are described later in this section.
The default installation of Oracle Database XE configures two redo log groups of one member each. Thus, the default configuration for the redo logs does not use multiplexing. As shown in Figure 6-1, both single-member redo log groups are stored in the flash recovery area.
You may want to multiplex the redo logs to protect against failures. Again, the ideal configuration is to separate members of the same log group onto different disks to protect against disk failure. Assuming that you decided to configure two members per group, the best practice for Oracle Database XE would be the following:
Table 6-3 Datafile Locations
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Moving the flash recovery area to a different disk is preferred over leaving the flash recovery where it is and creating the second group member on a different disk. This is because the flash recovery area also contains database backups, and backups are best placed on a disk other than the disk that contains the datafiles.
Note:
When you multiplex the redo log, the database must increase the amount of I/O that it performs. Depending on your configuration, this may affect overall database performance.
See Also:
Archived Redo Log Files
Oracle Database XE can be configured so that a background archiving process makes copies of filled, inactive redo log files in the flash recovery area before they are reused. Redo log files copied in this way are called archived redo log files.
Note:
When the redo log is multiplexed, the database selects one member of that log file's group to archive. If a member is damaged or unavailable, the database attempts to archive another member.
A database configured to archive redo logs is said to be in
ARCHIVELOG mode. (A database not configured to archive redo logs is said to be in NOARCHIVELOG mode.)
The advantages of running in
ARCHIVELOG mode are the following:
In
ARCHIVELOG mode, the archived redo log files require disk space in the flash recovery area, and the flash recovery area requires monitoring to ensure that it does not fill completely.
Log archiving is disabled by default, to simplify the management of your database. Thus, the default configuration of Oracle Database XE protects your database from instance failure or operating system failure, but does not protect your database from media failure. Oracle therefore recommends that you do the following for complete data protection:
Note:
If you enable ARCHIVELOG mode, you must perform regular backups of the database to avoid completely filling the flash recovery area. A completely filled flash recovery area can lead to database failure.
See Also:
Monitoring Storage Space Usage
Because Oracle Database Express Edition (Oracle Database XE) is limited to just over four gigabytes (GB) of user data, your most important storage management task is monitoring the amount of free storage space and storage space used for any tablespaces used for storing user data.
To check this usage information:
If you notice that space remaining is becoming low, you can attempt to free some space by doing the following:
Note:
If you log in to the database and connect as SYSDBA , you can purge the entire recycle bin (all schemas simultaneously). See Oracle Database Administrator's Guide
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If this procedure does not free a significant amount of space and you expect space requirements to continue to grow, you must consider upgrading to Oracle Database Standard Edition or Enterprise Edition.
See Also:
Compacting Storage
If you notice that space remaining in the database is becoming low, you can compact storage. Compacting storage attempts to recover unused fragmented free space in the database. Depending on the state of the database, compacting storage may or may not recover unused space.
Compacting and other options for reclaiming space are explained in the chapter about reclaiming waster space in Oracle Database Administrator's Guide.
See Also:
Viewing Tablespaces
You can use the Oracle Database XE graphical user interface to view a list of tablespaces in the database, view tablespace properties, and view datafile properties.
To view Oracle Database XE tablespaces:
See Also:
Viewing Redo Log Files
You can use the DBA navigator in SQL Developer to view location and status information for the online redo log files.
See 'Online Redo Log Files' for more information on redo log groups and log group members.
Note:
The display does not include information on archived redo log files. In addition, the default configuration of Oracle Database XE does not include redo log multiplexing.
See Also:
'Recovery-Related Structures in the Flash Recovery Area'
Managing the Flash Recovery Area
Oracle Database Express Edition (Oracle Database XE) stores database backups, online redo log files, and archived redo log files in the flash recovery area. The primary management tasks related to the flash recovery area are the following:
The flash recovery area is a fixed-size storage area. The default size is 10 gigabytes (GB). Because Oracle Database XE storage is limited to 5 GB, two backups of the database are expected to fit in the flash recovery area. However, when running in
ARCHIVELOG mode, you may need to allocate extra space for archived redo log files, and you must monitor flash recovery area available space more closely. (See 'Archived Redo Log Files' for information about ARCHIVELOG mode.)
This section contains the following topics:
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See Also:
Monitoring Space in the Flash Recovery Area
You must run a SQL query to determine the current available space in the flash recovery area.
To view current available space in the flash recovery area:
The query results should look something like this:
Interpret the results as follows:
If the
PERCENT_FULL value is approaching 100% (for example, is 85% or more), and log archiving is enabled (the database is in ARCHIVELOG mode), it may be time to back up the database. Backing up the database deletes archived log files and frees space in the flash recovery area.
If the
PERCENT_FULL value is frequently close to 100% after several recent backups, consider allocating more space for your flash recovery area as described in 'Setting Flash Recovery Area Location and Size', or, if in ARCHIVELOG mode, taking backups more frequently to reduce the size of the retained archived log files.
See Also:
Setting Flash Recovery Area Location and Size
This section explains the procedures for setting the flash recovery area location and for changing the flash recovery area size. The flash recovery area location and size are specified by the initialization parameters
DB_RECOVERY_FILE_DEST and DB_RECOVERY_FILE_DEST_SIZE .
Setting the Flash Recovery Area Location
Table 6-2 shows the default flash recovery area locations on both platforms.
To change the flash recovery area location:
Note:
After you change the location of the flash recovery area, Recovery Manager (RMAN) can still use the backups and archived logs in the old location until they become obsolete. The old backups cannot be moved to the new flash recovery area location.
Do not manually delete the contents of the old flash recovery area using operating system utilities. Instead, make the backups in the old flash recovery area location obsolete by backing up your database twice after you change the location of the flash recovery area.
Each time that you back up the database as described in 'Backing Up the Database', obsolete backups and archived logs are deleted so that only the two most recent backups and accompanying archived redo logs are retained. Thus, after the new flash recovery area contains two recent backups, all files are deleted from the old location.
See Also:
Changing the Flash Recovery Area Size
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To change the flash recovery area size:
See Also:
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Oracle 11g Express Edition Free For Mac Download
movelogs.sql Script
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The following is a listing of the movelogs.sql script, which you must run after changing the location of the flash recovery area. The script moves the online redo log files to the new flash recovery area location and drops the log files from the old location.
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