wendybevier2119 wendybevier2119
  • 26-04-2024
  • Computers and Technology
Answered

If the SQL statement SELECT R1. A, R2. B FROM R1, R2 WHERE R1. K = R2. F AND R2. K = 10 is frequently executed, which indexes will prove most useful?

(a) Index on R1. K and index on R2. K
(b) Index on R1. A and index on R2. B
(c) Index on R1. K and index on R2. F
(d) Composite index on (R2. K, R2. F)



Answer :

Other Questions

at Alan's sports shop, GO FAST trainers cost £40.95 originally and there is a third off in the sale.  At  Irene's sport shop, GO FAST trainers cost £40.00 origi
What does the word tolerance mean in textiles?
When written in symbols, “the product ofr and s, raisedto the fourth power,” is represented as:
How long did king Arthur served
what is 5.36201 rounded to 1 decimal place
where sugar concentration is high, what is the source of water taken in by phloem
One route along flat terrain from Hermansville to Melville is to drive straight north from Hermansville for 120 miles to Jamestown, then, at Jamestown, to drive
If a rectangle measures 20 meters by 48 meters, what is the length, of the diagonal of the rectangle? Can you help me with this one ?
lakes and oceans have different animal life ?
lightning thief: what is percys plan to get past cerberus?why dosnet it work?