The Source Code - Multilevel Security for Relational Databases - page 163

Figure 9.3 The concurrency control form.

• Text box: used for writing the SQL query statement
• Data grid: used for viewing the result of the SQL query
statement (Figure 9.3)

This screen helps the user in executing the SQL query statement
and in simulating the concurrency control in the multilevel database
security. This form contains the following:

• Execution button: used for simulating the concurrency control
in the multilevel database security
• Selective radio button: used for selecting concurrency control
models in the multilevel database security model
• Text box: used for writing the number of the concurrent
transaction in the same time

9.3 Source Code of the Microsoft SQL Server

The source code of the Microsoft SQL server will be divided into
four parts:

• Create some tables that define the security classification levels
of the data in the multilevel relational database.