In your new job as a software developer, you are tasked to write a report that will utilize

several long running SQL statements. For example, you are required to read a large table

using multiple SQL statements. You start to think about the other users of the DB and

how they are actively changing the database while your multiple SQL statements are

running. For each question below, discuss how each consistency levels $($read

uncommitted, read committed, repeatable read, and serializable $)$ could impact the results

$($include $1$ to $2$ sentences for each these levels and for each problem$).$ BE SPECIFIC to

this situation $($do not repeat what Wikipedia tells you, tell me how each level could

impact the results here$).$

a$)$ Should you be concerned that the data within a single SQL statement will contain work

that is not committed?

b$)$ Should you be concerned that rows that were committed $($by other transactions$)$ during

the execution of your first SQL statement will be visible when the second SQL statement

starts? Why$/$why not