Automatically defining attribute relationships

If you are only given the option of opening Architect in read only mode, this means another user is modifying the project’s schema. Data recovery near me You cannot open Architect in edit mode until the other user is finished with their changes and the schema is unlocked.

For information on how you can use read only mode and edit mode for various schema editors, see Using read only or edit mode for schema editors.

From the Hierarchy View, on the Home tab, in the drop-down list on the Hierarchy area of the toolbar, select System Hierarchy View.


Database job description The system hierarchy is displayed.

Right-click within the area that displays the attributes for your project, and select Recognize Relationships. Data recovery 94fbr The System Hierarchy dialog box opens.

Based on Primary Keys/Foreign Keys: Creates attribute relationships based on the primary keys and foreign keys defined on your tables. Database foreign key Each attribute that acts as a foreign key of a table is defined as a parent attribute of each attribute that acts as a primary key of the same table. Database as a service The attribute relationship is defined as a one-to-many relationship from the foreign key attribute (parent attribute) to the primary key attribute (child attribute).

Based on lookup tables: Creates attribute relationships based on lookup tables that do not include primary key or foreign key information. Iphone 6 data recovery To define a table as a lookup table for an attribute, see Creating attributes. Database google drive Each attribute that defines a table as its lookup table is defined as a child attribute of all other attributes in the same table, that do not define the table as its lookup table. Data recovery geek squad Each attribute relationship is defined as a one-to-many relationship from the parent attribute to the child attribute.

Based on sample data from the table: Creates attribute relationships for attributes that share the same lookup table. Database recovery pending To define a table as a lookup table for an attribute, see Creating attributes.

Architect analyzes sample data for the table. Data recovery prices The attributes with fewer distinct values are defined as parents of the attributes with more distinct values, using a one-to-many relationship from the parent attribute to the child attribute. Database sharding For example, a lookup table includes four rows of data, which include data related to year and quarter. Database keys with example Each row includes the same year (for example, 2009), but the quarter changes for each row (Q1, Q2, Q3, Q4). Data recovery xfs In this case, the Year attribute is created as a parent of the Quarter attribute. Database management systems 3rd edition 7

If you selected the Show preview results check box to preview the results of automatically defining attribute relationships (see Defining project creation and display options) the Results Preview dialog box is displayed. Database engineer salary From this dialog box, you can select which attribute relationships should be created and which attribute relationships should be excluded. Jstor database After you have made all your selections, click OK to allow Architect to automatically define attribute relationships.

If you cleared the Show preview results check box (see Defining project creation and display options) Architect automatically creates all potential attribute relationships without first displaying them in the Results Preview dialog box.

After all relationships are determined by the rules that you selected, Architect performs final analysis on the attribute relationships that are to be created. E m database Any attribute relationships that are found to be redundant are not created. Data recovery richmond va This ensures that attribute relationships are created that properly reflect the design of the data in your data source. Data recovery software For information on modifying the attribute relationships that are created, see Defining attribute relationships.

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