When you use a LIKE clause on a column in a query, and the column has Double-Byte Character Set (DBCS) characters, not all the records that meet the criteria are returned.
All the records meeting the criteria may not be returned if the following conditions are true:
- The database consists of DBCS data, such as Korean or Chinese.
- The column is indexed.
- Alphanumeric characters are the leading characters in the string.
Obtain Microsoft Jet 4.0 Service Pack 4 (SP4) or later, which contains an updated version of the Microsoft Jet 4.0 database engine.
For additional information about how to obtain the latest version of the Jet 4.0 database engine, click the following article number to view the article in the Microsoft Knowledge Base:
How To: Obtain the Latest Service Pack for the Microsoft Jet 4.0 Database Engine
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.