In Feburary 2016 20,
Click the Windows 'Start' button and click 'All Programs.' Click 'MySQL' and then click 'MySQL Workbench' to open your main console.
Click 'Edit SQL Script' in the main console window. This opens a SQL editor where you create the foreign key.
Type the following code into your editor:alter table table_name add constraint key_name foreign keyreferences tbl_name primary_keyThe first line sets the foreign key. Replace 'table_name' with the name of your table. 'Key_name' is the name of the column in your table you want to set as the foreign key. The second line is the primary key information to link to the foreign key. Replace 'tbl_name' with the table that contains the primary key and 'primary_key' with the primary key column name.
Click 'Run' to run your SQL statement. The foreign key is created, and your tables are set up with the linked attributes.
In Feburary 2016 20,
Showing posts with label alter. Show all posts
Showing posts with label alter. Show all posts
Saturday, 20 February 2016
Wednesday, 3 February 2016
The Advantages Disadvantages of Proprietary OpenIn Feburary 2016 03,
In Feburary 2016 03,
Open-source database systems such as MySQL provide access to their source code. This means that anyone can see and edit the source code as well as using it in its compiled executable form. Proprietary databases tend to be closed source, so when you purchase a proprietary database system, for example Oracle or Microsoft Access, you are effectively purchasing the right to use the software rather than the software itself. Although the ability to access the source code used in a database system may not matter to the end user in many cases, it can affect the quality of the code because the open-source communities are able to report and in some cases fix bugs. Because an open-source database can be edited, organizations can alter it to suit their own particular needs.
Releases
Open-source systems tend to be updated more regularly than proprietary systems. This is partly because where proprietary systems are only accessed and worked on by a limited development team within the company responsible for the database product, open-source systems are worked on by an entire community, sometimes on a global scale. This means that bugs tend to be fixed faster and security issues addressed more promptly with open-source systems. Security vulnerabilities are also more visible with an open-source system than with a proprietary system, where only employees of the organization can view the code.
Costs
Proprietary database systems are charged at a commercial rate. Such rates vary for different types of account and usage. In most cases, an organization must purchase a license for each computer or account they plan on using the database system on. With an open-source database system, there is typically no cost and no restriction on the number of computers or users the database may be installed on or accessed by. The costs associated with proprietary database systems vary significantly for different system variants and account types. In some cases, the costs are so great that only large organizations can consider the database an option.
Support
Support is one of the few aspects sometimes considered an advantage with certain proprietary systems. With open-source database systems, support is usually not sourced from a single location or organization, but is sourced from the community as a whole. With a proprietary database system, customers can purchase a license with some level of support included. In such cases the customer can be more assured that the support they require will be made available to them on agreed terms, where the support with an open-source system may be less predictable.
In Feburary 2016 03,
Open-source database systems such as MySQL provide access to their source code. This means that anyone can see and edit the source code as well as using it in its compiled executable form. Proprietary databases tend to be closed source, so when you purchase a proprietary database system, for example Oracle or Microsoft Access, you are effectively purchasing the right to use the software rather than the software itself. Although the ability to access the source code used in a database system may not matter to the end user in many cases, it can affect the quality of the code because the open-source communities are able to report and in some cases fix bugs. Because an open-source database can be edited, organizations can alter it to suit their own particular needs.
Releases
Open-source systems tend to be updated more regularly than proprietary systems. This is partly because where proprietary systems are only accessed and worked on by a limited development team within the company responsible for the database product, open-source systems are worked on by an entire community, sometimes on a global scale. This means that bugs tend to be fixed faster and security issues addressed more promptly with open-source systems. Security vulnerabilities are also more visible with an open-source system than with a proprietary system, where only employees of the organization can view the code.
Costs
Proprietary database systems are charged at a commercial rate. Such rates vary for different types of account and usage. In most cases, an organization must purchase a license for each computer or account they plan on using the database system on. With an open-source database system, there is typically no cost and no restriction on the number of computers or users the database may be installed on or accessed by. The costs associated with proprietary database systems vary significantly for different system variants and account types. In some cases, the costs are so great that only large organizations can consider the database an option.
Support
Support is one of the few aspects sometimes considered an advantage with certain proprietary systems. With open-source database systems, support is usually not sourced from a single location or organization, but is sourced from the community as a whole. With a proprietary database system, customers can purchase a license with some level of support included. In such cases the customer can be more assured that the support they require will be made available to them on agreed terms, where the support with an open-source system may be less predictable.
In Feburary 2016 03,
How to Change PHP Settings on PleskIn Feburary 2016 03,
In Feburary 2016 03,
Log in to your Plesk control panel as the administrator.
Click 'Domains,' then open the domain with the PHP settings you want to alter.
Click 'Web Directories,' and then select 'Preferences.'
Press 'OK,' and then click the 'PHP settings' button.
Make the changes you wish to make in the onscreen editor, then click the 'Save' button to apply them and then restart the Apache Web server.
In Feburary 2016 03,
Log in to your Plesk control panel as the administrator.
Click 'Domains,' then open the domain with the PHP settings you want to alter.
Click 'Web Directories,' and then select 'Preferences.'
Press 'OK,' and then click the 'PHP settings' button.
Make the changes you wish to make in the onscreen editor, then click the 'Save' button to apply them and then restart the Apache Web server.
In Feburary 2016 03,
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