Examlex
The difference between value-based constraints and value-neutral constraints is that value-based constraints are based on the comparison of columns while value-neutral constraints are based on the comparison of a column to constant using a comparison operator.
Variance
A statistical measurement of the dispersion of a set of data points, reflecting how much each number in the set differs from the mean.
Governor Cut-out
Governor cut-out is a mechanism in compressors or engines designed to disengage or reduce fuel supply once a predetermined speed or pressure is reached, to prevent over-speeding.
Governor Cut-in
The point at which a governor device starts to regulate or limit the speed, pressure, or other operational parameters to prevent system overloads.
Tractor Protection Valve
A safety device in air-braked vehicles that preserves air for the tractor in case of a trailer brake system failure.
Q18: The following SQL2 command is executed: CREATE
Q21: In the database development process,the _ phase
Q22: The table STUDENTC contains many more
Q30: A(n)_ is also known as a dirty
Q34: Which of the following is the reason
Q35: Because they are commonly occur,and contain columns
Q47: A table is in _ if every
Q53: An unknown value,or a value that does
Q53: The ideal Btree structure is wide,i.e.it has
Q61: The broadest goal of database development is