Find the second most successful coach in regular seasons in history. The level o

Question

Find the second most successful coach in regular seasons in history. The level of success of a coach is measured as season_win /(season_win + season_loss). Note that you have to count in all seasons a coach attended to calculate this value.

schema

create table teams (tid varchar(30), location varchar(30), name varchar(30),league varchar(30), primary key (tid, league));

create table coaches_season (cid varchar(30), year int, yr_order int,firstname varchar(30), lastname varchar(30), season_win int, season_loss int,playoff_win int, playoff_loss int, tid varchar(30), primary key (cid, year,yr_order));

create table draft (draft_year int, draft_round int, selection int, tidvarchar(30), firstname varchar(30), lastname varchar(30), ilkid varchar(30),draft_from varchar(100), league varchar(30));

create table players (ilkid varchar(30), firstname varchar(30), lastnamevarchar(30), position varchar(1), first_season int, last_season int, h_feet int,h_inches real, weight real, college varchar(100), birthday varchar(30), primarykey (ilkid));

create table player_rs_career (ilkid varchar(30), firstname varchar(30),lastname varchar(30), league varchar(10), gp int, minutes int, pts int, drebint, oreb int, reb int, asts int, stl int, blk int, turnover int, pf int, fgaint, fgm int, fta int, ftm int, tpa int, tpm int);

create table player_rs (ilkid varchar(30), year int, firstname varchar(30),lastname varchar(30), tid varchar(30), league varchar(10), gp int, minutes int,pts int, dreb int, oreb int, reb int, asts int, stl int, blk int, turnover int,pf int, fga int, fgm int, fta int, ftm int, tpa int, tpm int, primary key(ilkid,year, tid));

Answer in sql please thanks

Explanation / Answer

select cid,firstname,lastname, (season_win /(season_win + season_loss)) as successlevel from coaches_season where rownum=2 group by cid order by successlevel;

This query will give the second most successfull coach calculating all seasons.

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