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大牛寫(xiě)的這兩段SQL實(shí)在是太銷(xiāo)魂了，實(shí)在是忍不住要轉(zhuǎn)載過(guò)來(lái)，留著以后慢慢看，太牛了……
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with a as (select distinct round(a.x + b.x) x,round(a.y + b.y) y from
(select (sum(x) over(order by n)) x,
? ?? ?? ?? ?? ?? ?? ?? ?? ? round(sum(y) over(order by n)) y
? ?? ?? ?? ???from (select n, cos(n/30 * 3.1415926)*2??x,
? ?? ?? ?? ?? ?? ?? ?? ?? ?sin(n/30 * 3.1415926) y
? ?? ?? ?? ?? ?? ?? ?? ?? ?from (select rownum - 1 n from all_objects where rownum <= 30 +30))) a,
? ?? ?? ?? ?(select n, (sum(x) over(order by n)) x,
? ?? ?? ?? ?? ?? ?? ?? ?? ? round(sum(y) over(order by n)) y
? ?? ?? ?? ???from (select n,
? ?? ?? ?? ?? ?? ?? ?? ?? ?cos( m /3 * 3.1415926) * 2 * 15 x,
? ?? ?? ?? ?? ?? ?? ?? ?? ?sin( m /3 * 3.1415926)* 15 y
? ?? ?? ?? ?? ?? ?? ? from (select case when rownum <= 2 then 3
? ?? ?? ?? ?? ?? ?? ? when rownum = 3 then -2 else -6 end m, rownum - 1 n
? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?from all_objects where rownum <= 5))) b
? ?? ?? ? )
select replace(sys_connect_by_path(point, '/'), '/', null) star
??from (select b.y, b.x, decode(a.x, null, ' ', '*') point
? ?? ?? ? from a,
? ?? ?? ?? ?? ?(select *
? ?? ?? ?? ?? ?? ?from (select rownum - 1 + (select min(x) from a) x
? ?? ?? ?? ?? ?? ?? ?? ???from all_objects
? ?? ?? ?? ?? ?? ?? ?? ? where rownum <= (select max(x) - min(x) + 1 from a)),
? ?? ?? ?? ?? ?? ?? ???(select rownum - 1 + (select min(y) from a) y
? ?? ?? ?? ?? ?? ?? ?? ???from all_objects
? ?? ?? ?? ?? ?? ?? ?? ? where rownum <= (select max(y) - min(y) + 1 from a))) b
? ?? ?? ?where a.x(+) = b.x
? ?? ?? ???and a.y(+) = b.y)
where x = (select max(x) from a)
start with x = (select min(x) from a)
connect by y = prior y
? ?? ? and x = prior x + 1;
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with a as (
??????????? select distinct round(sum(x) over(order by n)) x,
??????????????????????????? round(sum(y) over(order by n)) y
????????????? from (select n,
?????????????????????????? cos(trunc(n / 20) * (1-1/5) * 3.1415926) * 2 x,
?????????????????????????? sin(trunc(n / 20) * (1-1/5) * 3.1415926) y
????????????????????? from (select rownum - 1 n from all_objects where rownum <= 20 * 5))
????????? )
select replace(sys_connect_by_path(point, '/'), '/', null) star
? from (select b.y, b.x, decode(a.x, null, ' ', '*') point
????????? from a,
?????????????? (select *
????????????????? from (select rownum - 1 + (select min(x) from a) x
????????????????????????? from all_objects
???????????????????????? where rownum <= (select max(x) - min(x) + 1 from a)),
?????????????????????? (select rownum - 1 + (select min(y) from a) y
????????????????????????? from all_objects
???????????????????????? where rownum <= (select max(y) - min(y) + 1 from a))) b
???????? where a.x(+) = b.x
?????????? and a.y(+) = b.y)
where x = (select max(x) from a)
start with x = (select min(x) from a)
connect by y = prior y
?????? and x = prior x + 1;
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-The End-