create or replace noneditionable function unix_to_oracle(in_number NUMBER) return date is
begin
  return(TO_DATE('19700101','yyyymmdd') + in_number/86400 +TO_NUMBER(SUBSTR(TZ_OFFSET(sessiontimezone),1,3))/24);
end unix_to_oracle;
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http://www.cndba.cn/hbhe0316/article/116471
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 http://www.cndba.cn/hbhe0316/article/116471
 http://www.cndba.cn/hbhe0316/article/116471
http://www.cndba.cn/hbhe0316/article/116471
 http://www.cndba.cn/hbhe0316/article/116471
http://www.cndba.cn/hbhe0316/article/116471
http://www.cndba.cn/hbhe0316/article/116471
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