Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 27 Sep 2017 My Price 8.00

values of columns

Consider Figure 2.1. In addition to constraints relating the values of columns in one table to columns in another table, there are also constraints that impose restrictions on values in a column or a combination of columns within a table. One such constraint dictates that a column or a group of columns must be unique across all rows in the table. For example, in the STUDENT table, the Student number column must be unique (to prevent two different students from having the same Student number). Identify the column or the group of columns in the other tables that must be unique across all rows in the table.

Figure 2.1

 

 

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Maurice Tutor
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Status NEW Posted 27 Sep 2017 03:09 PM My Price 8.00

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