Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] good performance, defining checking against standards knowing what you get knowing what you spend performance goals granularity of locking required by decision support systems table of contents vs. index greatest( ) function group by clauses filtering and use in aggregate statements |