使用 GMP The GNU Multiple Precision Arithmetic Libraryhttps://gmplib.org/我很討厭這種先輸入...
-- 查看時區設定 SELECT current_setting('TIMEZONE'); +-----------------+ | current_set...
-- 使用 PostgreSQL -- create trigger 時有 for each row -- 這樣就能避免上面的情況 -- 提供你參考 cre...
select concat( trunc( random() * 254 ), '.' ,trunc( random() * 25...
input <- sample(c(25:75)) input isGood <- function(x) { if (x>50)...
collected_list = [ [('0.017', '0.107'), ('0.018', '0.115'), ('0.019', '0.113'),...
select substring('1-22 Nov 2017, 2:34 PM' from 3)::date as datestyle , subs...
create table ithelp171214 ( id serial primary key , shop char(1) not null , bu...
create table ithelp170811 ( id int not null , c1 char(1) , c2 int , c3 int , c...
create table ithelp171024 ( id int not null , mclass char(1) not null , phone...
一級屠豬士的鐵人檔案