Left Column the column of the first table, that will always be a primary key. It will receive the one endpoint of the link with the new relation table. Left Table is the first table that is to be linked. It creates a relationship tables having columns derived from the two tables and link them to the tables. The many to many link dialog allows you to:Īdd a many to many relationship between two tables. Referenced Column the column that is being referred. Referenced Table is the table that is being referred and has the one end point. Local Table is the table that references a table and has the many end point. The one to many link dialog allows you to:Īdd a foreign key relationship between two tables. Refer table dialog for information on different fields. Upon double click on the table node or by clicking the edit button from the toolbar, the table dialog opens where you can change the table details. You can click on the node and drag to move on the canvas. If the column is a primary key then it will have lock key icon eg. users in above image.Īll other rows below the table name are the columns of the table along with data type. The first row shows the schema name of the table. you can click on this button to quickly change the note. There is also a note button that is visible only if there is some note added. The top bar has a details toggle button that is used to toggle column details visibility. The table node shows table details in a graphical representation: It can be used edit an existing table or add a new one. It allows you to show few or moreĬlick this button to zoom in/out automatically and fit all the tables to the view.Ĭlick this button to zoom in the diagram.Ĭlick this button to zoom out the diagram. This option will create a new table based on the selected columns for the two relatingĬlick this button to make notes on tables nodes while designing the database.Ĭlick this button to auto align all tables and links to make it look more cleaner.Ĭlick this button to toggle the column details visibility. The selected table becomes the referencing table and will have the many endpoint ofĬlick this button to open a many-to-many relationship dialog to add a relationship between the You need to select a table or link and click onĬlick this button to open a one-to-many relationship dialog to add a relationship between the You can drop a table or link using this button. This will enable when a table is selected.Ĭlick this button to clone the complete table structure, name it with a auto generated name and On clicking, this will open a table dialog On clicking, this will open a table dialogĬlick this button to edit a table on the diagram. With the generated SQL ready for execution.Ĭlick the Download image icon to save the ERD diagram in a image formateĬlick this button to add a new table to the diagram. File Options ¶Ĭlick the Open File icon to load a previously saved diagram.Ĭlick the Save icon to perform a quick-save of a previously saved diagram, or to save theĬlick the Save As to open a new browser dialog and specify a new location to save the diagram.Ĭlick the Generate SQL icon to generate the DDL SQL for the diagram and open a query tool ![]() Hover over an icon on Toolbar to display a tooltip that describes the icon’s functionality. The option is enabled for the highlighted icon and is disabled for the grayed-out icon. The ERD Tool toolbar uses context-sensitive icons that provide shortcuts to frequently performed tasks. ![]() To close a copy of the ERD tool, click the X in the upper-right hand corner of the tab bar. You can open multiple copies of the ERD tool in individual tabs simultaneously. ![]() Generate the database diagram for an existing database.ĭrag and drop tables from browser tree to the diagram. Generate ready to run SQL from the database design. Save the diagram and open it later to continue working on it. The ERD Tool allows you to:ĭesign and visualize the database tables and their relationships.Īuto-align the tables and links for cleaner visualization. ERD can give sufficient information for the database administrator to follow when developing and maintaining the database. The Entity-Relationship Diagram (ERD) tool is a database design tool that provides a graphical representation of database tables, columns, and inter-relationships.
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