Question

我有兴趣修改外部查询，以一种非常特定的方式扩展查询结果。

我的内部查询创建一个表。外部查询创建从表中删除记录的条件。我希望外部查询删除的记录是单词“ not”与两个查询中的短语都包含在同一句子中的记录（“％postterm％”，“％post__term％”，“ after__term％”等）。 ..）

到目前为止，外部查询仅删除“ not”在短语前两个字符结尾的记录。

“ not”可以出现在此短语之前或之后。我需要的条件是句点之间的短语中是否包含“ not”。

任何帮助将不胜感激！干杯。

SELECT sub.*
FROM(
    SELECT TOP 10000 *
    FROM MyTable N
    WHERE

  (N.[Subject] like '%postterm%')
  OR
  (N.[Content] like '%postterm%')
  ORpos
  (N.[Subject] like '%post_term%')
  OR
  (N.[Content] like '%post_term%')
  Or
  (N.[Subject] like '%post__term%')
  OR
  (N.[Content] like '%post__term%')
  OR
  (N.[Subject] like '%afterterm%')
  OR
  (N.[Content] like '%afterterm%')
  OR
  (N.[Subject] like '%after_term%')
  OR
  (N.[Content] like '%after_term%')
  Or
  (N.[Subject] like '%after__term%')
  OR
  (N.[Content] like '%after__term%')

) sub

WHERE

  (sub.[Subject] not like '%not_postterm%'

    )
      OR

  (sub.[Content] not like '%not_postterm%')
  OR
  (sub.[Subject] not like '%not_post_term%')
  OR
  (sub.[Content] not like '%not_post_term%')
  Or
  (sub.[Subject] not like '%not_post__term%')
  OR
  (sub.[Content] not like '%not_post__term%')
  OR
  (sub.[Subject] not like '%not_afterterm%')
  OR
  (sub.[Content] not like '%not_afterterm%')
  OR
  (sub.[Subject] not like '%not_after_term%')
  OR
  (sub.[Content] not like '%not_after_term%')
  Or
  (sub.[Subject] not like '%not_after__term%')
  OR
  (sub.[Content] not like '%not_after__term%')

Answer 1

这一切都可以在更聪明的查询中完成。 String_Split函数需要是Sql Server 2012或更高版本，否则请查找如何创建自己的函数。

-- Set up the content
declare @T table(ID int, Content varchar(1000))
insert @t values (1, 'Hello. This is not Post Term. Another sentence')
insert @t values (2, 'Another. This is Post Term. Another sentence 2')

-- Define the search terms
declare @check table(Term varchar(100))
insert @check values ('%postterm%'),('%post_term%'),('%post__term%'),('%afterterm%'),('%after_term%'),('%after__term%')

-- This query shows you how how it works
SELECT ID, Content, SPL.value, Term, 
    case when value like '% NOT %' then 1 else 0 end as HasNot
FROM @T  AS PP
CROSS APPLY STRING_SPLIT(Content,'.') AS SPL
left join @check on SPL.Value like term

-- Final result
; with results as (
    SELECT ID, Content, SPL.value, Term, 
        case when value like '% NOT %' then 1 else 0 end as HasNot
    FROM @T  AS PP
    CROSS APPLY STRING_SPLIT(Content,'.') AS SPL
    left join @check on SPL.Value like term
)
select distinct ID,Content 
from results 
where term is not null and HasNot=1

修改棘手的外部SQL查询

1 个答案: