6

我发现这个答案很有用： Accent and case insensitive COLLATE equivalent in Oracle，但我的问题是关于使用版本 9 Oracle db 进行 LIKE 搜索。

我试过这样的查询：

SELECT column_name
FROM table_name
WHERE NLSSORT(column_name, 'NLS_SORT = Latin_AI')
LIKE NLSSORT('%somethingInDB%', 'NLS_SORT = Latin_AI')

但从未返回任何结果。

我创建了一个小 Java 文件来测试：

import org.apache.commons.dbcp.BasicDataSource;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

public class DbCollationTest
{
 public static void main(String[] args) throws SQLException
 {
  BasicDataSource dataSource = new BasicDataSource();
  dataSource.setDriverClassName("oracle.jdbc.driver.OracleDriver");
  dataSource.setUrl("url");
  dataSource.setUsername("usr");
  dataSource.setPassword("pass");

  Connection conn = null;
  PreparedStatement createStatement = null;
  PreparedStatement populateStatement = null;
  PreparedStatement queryStatement = null;
  PreparedStatement deleteStatement = null;
  ResultSet rs = null;

  try
  {
   conn = dataSource.getConnection();

   createStatement = conn.prepareStatement("CREATE TABLE CollationTestTable ( Name varchar(255) )");
   createStatement.execute();

   String[] names = { "pepe", "pépé", "PEPE", "MEME", "mémé", "meme" };
   int i = 1;

   for (String name : names)
   {
    populateStatement = conn.prepareStatement("INSERT INTO CollationTestTable VALUES (?)");
    populateStatement.setString(1, name);
    populateStatement.execute();
   }

   queryStatement = conn.prepareStatement("SELECT Name FROM CollationTestTable WHERE NLSSORT(NAME, 'NLS_SORT = Latin_AI') LIKE NLSSORT('%pe%', 'NLS_SORT = Latin_AI')");
   rs = queryStatement.executeQuery();

   while (rs.next())
   {
    System.out.println(rs.getString(1));
   }

   deleteStatement = conn.prepareStatement("DROP TABLE CollationTestTable");
   deleteStatement.execute();
  }
  finally
  {
   //DBTools.tidyUp(conn, null, rs);
   //DBTools.tidyUp(createStatement);
   //DBTools.tidyUp(populateStatement);
   //DBTools.tidyUp(queryStatement);
   //DBTools.tidyUp(deleteStatement);
  }
 }
}

我没有任何成功的谷歌搜索，有人有任何解决方案吗？

我想对名称的一部分执行搜索并返回使用不区分大小写和重音的匹配结果。

4

1 回答 1

11

一种方法是修改您的会话参数NLS_SORT和NLS_COMP：

SQL> SELECT Name FROM CollationTestTable WHERE NAME LIKE '%pe%';

NAME
--------------------------------------------------------------------------------
pepe

SQL> alter session set nls_sort=Latin_AI;

Session altered

SQL> alter session set nls_comp=linguistic;

Session altered

SQL> SELECT Name FROM CollationTestTable WHERE NAME LIKE '%pe%';

NAME
--------------------------------------------------------------------------------
pepe
pépé
PEPE

如另一个 SO所示，您不能使用 LIKE 运算符NLSSORT（这是因为NLSSORT 返回将用于排序的字节字符串，而 LIKE 仅适用于字符字符串）

更新：虽然设置 NLS 参数是我的第一选择，但您也可以使用内置函数来实现相同的结果。几个例子：

SQL> SELECT Name
  2    FROM CollationTestTable
  3   WHERE upper(convert(NAME, 'US7ASCII'))
  4         LIKE upper(convert('%pe%', 'US7ASCII'));

NAME
--------------------------------------------------------------------------------
pepe
pépé
PEPE

SQL> SELECT Name
  2    FROM CollationTestTable
  3   WHERE upper(translate(NAME, 'àâéèêìîòôùûÿ', 'aaeeeiioouuy'))
  4         LIKE upper(translate('%pe%', 'àâéèêìîòôùûÿ', 'aaeeeiioouuy'));

NAME
-----------------------------------
pepe
pépé
PEPE
于 2009-10-15T14:35:57.120 回答