Sqlite er diagram update#

UPDATE CASCASE was chosen to update staffNo whenever the attribute changes in the Staff table. staffNo is NOT NULL as Client has mandatory participation in the Registers relationship. staffNo has been posted into the Client relation from a 1:* Registers relationship where Client was the child and Staff was the parent. prefType has been merged into the Client entity from the Preference entity from a 1:1 States relationship with mandatory participation on both sides. You also need to populate your database (INSERT INTO вЂ¦) with some sample data and perform some simple queries to ensure it works correctly. If want to demonstrate ISO SQL that is not available in SQLite than include as a comment, but ensure that you have correct, runnable SQLite database as well. Include the relevant DROP statements and specify ALL primary and foreign keys. sql) and build the database using capabilities of SQLite. why does it contain a foreign key, can the foreign key be NULL, why has a particular ON UPDATE been chosen, etc), for example: (b) Translate your answer to (a) into SQL (in a file. You need to use the database description language as described in the textbook, for example (from Figure 17.4): You also need to justify the reasoning behind the derivation (e.g. Do not have any multivalued attributes and make any reasonable optimisations. Identify a primary key for each relation and subsequently all foreign keys. (a) Derive relations from the supplied Entity-Relationship Diagram given below into a logical model representation in terms of the relational data model.

Sqlite er diagram