a/c first appeared in homes in the 14th century.
a/c first appeared in homes in the 14th century.
when did a/c first appear in homes?
14th century
Na
Na
section::::implementation.:join ordering.









































the performance of a query plan is determined largely by the order in which the tables are joined. for example, when joining 3 tables a, b, c of size 10 rows, 10,000 rows, and 1,000,000 rows, respectively, a query plan that joins b and c first can take several orders-of-magnitude more time to execute than one that joins a and c first. most query optimizers determine join order via a dynamic programming algorithm pioneered by ibm's system r database project . this algorithm works in two stages:
query optimization