problem with WHERE clause matching on Arabic strin

问题:

I have a SQL Server 2005 database in which I have some tables contain Arabic text. The datatype for those fields is NVARCHAR(n).

The Arabic text inside the table is appearing properly, and when selecting, they appear properly.

Th problem is that searching for Arabic text results in 0 rows.

select * from table_name
where name='arabic_text'

This retrieves no rows, where there is a name with this value.

Can you please guide me on how to write the query?

回答1:

Try adding N before the text e.g.

select * from table_name
where name=N'arabic_text'

回答2:

select * from table_name where name like N'%arabic_text%' will work here

回答3:

If you search for word احمد and your records have أحمد your query will return nothing even if you are using like '%احمد%' . It is better to use Full-Text search.

DECLARE @SearchWord nvarchar(100)
SET @SearchWord = 'احمد'

DECLARE @SearchString nvarchar(100)
SET @SearchString = 'FormsOf(INFLECTIONAL, "' + @SearchWord + '")' 
--SET @SearchString =  @SearchWord 

SELECT Ar.[SuraID]
      ,Ar.[VerseID]
      ,Ar.[AyahText] as Arabic
      ,En.[AyahText] as English
  FROM [QuranDb].[dbo].[ArabicQuran] Ar
  join EnglishQuran En on En.ID=Ar.ID
  where   CONTAINS(ar.AyahText, @SearchString) 
 or  CONTAINS(En.AyahText, @SearchString ) 

Query with Full-Text (Inflectional)

Here is other example using CONTAINSTABLE CONTAINSTABLE link

DECLARE @SearchWord nvarchar(100)
SET @SearchWord = 'لا اله الا الله '

DECLARE @SearchString nvarchar(100)
SET @SearchString ='ISABOUT ("'+ @SearchWord+'")' 

SELECT K.RANK, Ar.AyahText,Ya.AyahText
FROM [ArabicQuran] AS Ar  
  INNER JOIN  
  CONTAINSTABLE([ArabicQuran], AyahText, @SearchString, LANGUAGE N'arabic'  ) AS K  
  ON Ar.ID = K.[KEY] 
  join EnQuranYusufAli Ya on ya.ID=Ar.ID
  order by k.RANK desc