Question

今天如何在火鸟的YYYYMMDD中获取日期，我看了following，但无法想出如何写这个。

Answer 1

我认为你可以做到：

select replace(cast(cast('Now' as date) as varchar(10)), '-', '')
from rdb$database

Answer 2

这是一个完整版本（整数）

select  Extract(year FROM cast('NOW' as date))*10000 +
        Extract(month FROM cast('NOW' as date))*100 +
        Extract(day  FROM cast('NOW' as date)) from rdb$database

这是一个完整版本（在VARCHAR中）

select  CAST(Extract(year FROM cast('NOW' as date))*10000 +
        Extract(month FROM cast('NOW' as date))*100 +
        Extract(day  FROM cast('NOW' as date)) AS VARCHAR(8)) from rdb$database

Answer 3

IN FIREBIRD v2.5.5：

SELECT    LPAD( EXTRACT( YEAR FROM CURRENT_TIMESTAMP ), 4, '0' ) ||
          LPAD( EXTRACT( MONTH FROM CURRENT_TIMESTAMP ), 2, '0' ) ||
          LPAD( EXTRACT( DAY FROM CURRENT_TIMESTAMP ), 2, '0' ) || ' ' ||
          LPAD( EXTRACT( HOUR FROM CURRENT_TIMESTAMP ), 2, '0' ) ||
          LPAD( EXTRACT( MINUTE FROM CURRENT_TIMESTAMP ), 2, '0' ) || 
          LPAD( TRUNC( EXTRACT( SECOND FROM CURRENT_TIMESTAMP ) ), 2, '0' )
FROM      rdb$database

输出为： YYYYMMDD HHMMSS

Answer 4

这应该有用。

CREATE TABLE tab( t time, d date, ts timestamp );
INSERT INTO tab(t,d,ts) VALUES ('14:59:23', '2007-12-31', '2007-12-31 14:59');

SELECT CAST(CAST(d as varchar(10)))
FROM tab;

如何获得今天在火鸟YYYYMMDD的日期

4 个答案: