1. Discuss attribute semantics as an informal measure of goodness for a rela- tion schema.
2. Discuss insertion, deletion, and modification anomalies. Why are they considered bad? Illustrate with examples.

When  attributes are intertwined together they form a relationship, it is believed   that attributes that have one  to one relation have a proper interpretation and better meaning which are assumed to be associated by them .

Tables that does not have a complete  data may encounter  problems called update anomalies, which have different categories  like  insertion, deletion, or modification anomalies

Explanation:

When  attributes are intertwined together they form a relationship, it is believed   that attributes that have one  to one relation have a proper interpretation and better meaning which are assumed to be associated by them . The semantics of a relation is defined as the  the exposition of value    attribute  in a tuple. That is to say a better way of the explanation  of a relations attributes  is a measure of informal well known relation designed.Tables that does not have a complete  data may encounter  problems called update anomalies, which have different categories  like  insertion, deletion, or modification anomalies. For  example of a table with on useful  data data called EMP-Department. There are two categories  of insertion anomalies,  For this method to be useful  for the detail  of a new employee in Emp-Department, we must add either value attribute   for the department that the employee is engaged in  or void. For the second method , an  the attribute value must be entered for the department 2 well so that there will be a  consistent value for department number 5 in other field in  EMP-Department. When a department does not have a new employee It is difficult to insert the department value

B. She participates in religious customs in an unconventional way.

Let’s look at the first stanza:

Some keep the Sabbath going to Church –

I keep it, staying at Home –

With a Bobolink for a Chorister –

And an Orchard, for a Dome –

The first line of the stanza tells readers how some participate in the Sabbath by doing the traditional thing of going to Church (we can assume on Sunday mornings).  However, the poem proceeds by her telling us that she does not go to Church—she stays home as she keeps the Sabbath.  In fact, instead of a traditional choir, she has the song of a bird called a Bobolink.  And, instead of sitting underneath a Church dome, she sits underneath the trees of an orchard.  As such, it can be determined that she, indeed, keeps the Sabbath; however, she does so in her own way which goes against convention.