Victor M. Markowitz and Arie Shoshani. An overview of the lawrence berkeley laboratory extended entity-relationship database tools. Technical report, Lawrence Berkeley Laboratory, 1993.  Home/Search   Document Details and Download   Summary   Related Articles

....9 offers an alternative, namely to change the FK instances in the child table due to a PK modification. A generally agreed abstract notation for the relational model does not exist. Each tool which allows modeling or reports at the relational level has its own textual or graphical notation, e.g. [53, 61]. A concise graphical notation of the abstract relational data model which can be used to visualize the schema is needed for this work. The update propagation properties (restrict, cascade, set null and set default) should be visible within the schema. This requires the definition of a new ....

....in [29] Some update propagation actions which could be automatically derived from Subtype Supertype relations are listed in [32, p. 619] and [1, p. 66] An example using the notation of Information Engineering is described in [36, p. 69 81] not available in SQL 92, see Section 2. 5 See [53] for a tool which allows this 42 3. Ambiguous mapping can be a problem when naming conflicts occur while FK attributes are migrated during mapping. Most tools provide an automatic renaming scheme of some kind to tackle the problem. Another problem for ambiguous mapping is the case of a ....

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Victor M. Markowitz and Arie Shoshani. An overview of the lawrence berkeley laboratory extended entity-relationship database tools. Technical report, Lawrence Berkeley Laboratory, 1993.

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