Draw a graph whose line graph is isomorphic to the graph.
Refer to Figure 2.14 for details of the answer.
You might also like to view...
Give an example of a schedule produced by a nonstrict two-phase locking concurrency control that is serializable but not in commit order.
What will be an ideal response?
Consider the three transactions T1, T2, and T3, and the schedules S1 and S2 given below. Draw the serializibility (precedence) graphs for S1 and S2 and state whether each schedule is serializable or not. If a schedule is serializable, write down the equivalent serial schedule(s).
T1: r1(x); r1(z); w1(x) T2: r2(z); r2(y); w2(z); w2(y) T3: r3(x); r3(y); w3(y) S1: r1(x); r2(z); r1(x); r3(x); r3(y); w1(x); w3(y); r2(y); w2(z); w2(y) S2: r1(x); r2(z); r3(x); r1(z); r2(y); r3(y); w1(x); w2(z); w3(y); w2(y)
In SQL, what statement is used to retrieve data from a table?
A) RETRIEVE B) UPDATE C) SELECT D) GET
Another name for a field in a table is a tuple
Indicate whether the statement is true or false