Database Design And Implementation

Done so far… Started a design of your own data model In Software Engineering, recognised the processes that occur in the system.

To do… Implement the data model using CREATE statements –In SQL Server –In Oracle Populate the data model using inserts Design –Queries that will be relevant to the system –Transactions that will cause the data to flow through the system.

Data model –Give the attributes: data types Check constraints –Note any checks that need to be done that cannot be done in the CREATE statement. Later, these can be implemented through triggers. –Decide on the sample of data you want to use to populate your model.

Implementing your model in SQL Server Keep your SQL Server SQL separate from your Oracle SQL. –Set up a SQL Server implementation directory for your.SQL files. E.g. U:\databases\SQLServer\MYMODEL.SQL –Implement the CREATEs in SQL Server –Populate the model using ‘INSERT’ statements.

Implementing your model in SQL Server Keep your SQL Server SQL separate from your Oracle SQL. –Set up a SQL Server implementation directory for your.SQL files. E.g. U:\databases\SQLServer\MYMODEL.SQL –Implement the CREATEs in SQL Server –Populate the model using ‘INSERT’ statements.

Copy to Oracle Set up an Oracle implementation directory –E.g. U:\databases\Oracle\ Copy the SQL from your SQL Server directory Note the differences in syntax between Oracle create and SQL Server create. Change the Oracle SQL.

Design your processes Using the processes uncovered in Software Engineering –Design transactions to implement those processes Design queries that would be useful in your system. –When you think about this, it can help you to decide what data you want in your system.

More Data Manipulation language We have done: –Insert –Select To do: –Delete –Update

Delete To delete from a table: –Delete from where E.g.(see handout) –Delete from STUDENT where MINIT like ‘B’; Note: –1. This may not work. Look at the handout and decide why.

Update set = Where e.g. Update student set FNAME = ‘Sidney’ Where SID = 2222;