Sql 按顺序排列的Oracle动态描述和ASC
Order by是动态的,但排序顺序是静态的Sql 按顺序排列的Oracle动态描述和ASC,sql,oracle,Sql,Oracle,Order by是动态的,但排序顺序是静态的 SELECT ... Order By CASE WHEN InputParam = 'PRICE' THEN OFFER_PRICE END DESC, CASE WHEN InputParam = 'ENDING SOON' THEN EXPIRY_DATE END DESC, CASE WHEN InputParam = 'DISCOUNT' THEN DISC_PERCENTAGE END DESC,
SELECT ...
Order By CASE WHEN InputParam = 'PRICE' THEN OFFER_PRICE END DESC,
CASE WHEN InputParam = 'ENDING SOON' THEN EXPIRY_DATE END DESC,
CASE WHEN InputParam = 'DISCOUNT' THEN DISC_PERCENTAGE END DESC,
CASE WHEN InputParam = 'SAVING' THEN SAVING END DESC
现在我需要确保排序顺序也是动态的。在上述查询中,是否有某种方法可以使排序顺序动态化?如果您还想使排序顺序(ASC/DESC)动态化,可以执行以下操作:
SELECT ...
Order By CASE WHEN InputParam = 'PRICE' THEN l_so * OFFER_PRICE END,
CASE WHEN InputParam = 'ENDING SOON'
THEN l_so * (SYSDATE - EXPIRY_DATE) END,
CASE WHEN InputParam = 'DISCOUNT' THEN l_so * DISC_PERCENTAGE END,
CASE WHEN InputParam = 'SAVING' THEN l_so * SAVING END
使用变量l\u so
,该变量包含1或-1,具体取决于所需的排序顺序。这对我很有用:
order by
case when :dir_param = 'ASC' then
case :col_param
when 'col_1_identifier' then col_1_name
when 'col_2_identifier' then col_2_name
...
end
end,
case when :dir_param = 'DSC' then
case :col_param
when 'col_1_identifier' then col_1_name
when 'col_2_identifier' then col_2_name
...
end
end desc
或
将文字、变量和列名替换为特定于您的情况的名称。Oracle似乎对desc sort direction限定符的位置非常挑剔。expiration\u Date是datetime列。上述方法对此不起作用。@Aseem:您可以为日期顺序设置两个case(一个用于ASC,一个用于DESC),或者将日期转换为数字(天数)并使用变量选择正确的顺序。我已经完成了两个case逻辑,但SYSDATE-expiration\u date逻辑非常酷。谢谢
order by
case when :dir_param = 'ASC' and :col_param = 'col_1_identifier' then col_1_name end,
case when :dir_param = 'DSC' and :col_param = 'col_1_identifier' then col_1_name end desc,
case when :dir_param = 'ASC' and :col_param = 'col_2_identifier' then col_2_name end,
case when :dir_param = 'DSC' and :col_param = 'col_2_identifier' then col_2_name end desc