If a piece of data is stored in two places in the database then

changing the data is one spot will cause data inconsistency

The shortest distance between two places measured along the surface of the earth is

Length of the arc of the great circle passing through them

Length of the equator between their longitudes

Length of the parallel between their longitudes

length of the arc of the great circle passing through them

length of the equator between their longitudes

length of the parallel between their longitudes

T is immediately to the left of P or P is immediately to the right of Q

P is immediately to the right of R

T is immediately to the left of P

U is immediately to the right of R or P is immediately to the left of T

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