写个存储过程ORACLE将一个表除了前四列的所有列的值变成列名加值然后合并成一列

好的，以下是实现该功能的存储过程代码：

CREATE OR REPLACE PROCEDURE merge_columns
IS
  l_sql VARCHAR2(4000);
BEGIN
  -- 获取表名
  l_sql := 'SELECT table_name FROM user_tables WHERE table_name = ''YOUR_TABLE_NAME''';
  EXECUTE IMMEDIATE l_sql INTO l_sql;
  
  -- 获取列名
  l_sql := 'SELECT column_name FROM user_tab_columns WHERE table_name = ''YOUR_TABLE_NAME'' AND column_id > 4';
  DECLARE
    l_column_name VARCHAR2(4000);
  BEGIN
    FOR c IN (EXECUTE IMMEDIATE l_sql)
    LOOP
      -- 将列名和值合并成一列
      l_column_name := c.column_name;
      l_sql := 'UPDATE YOUR_TABLE_NAME SET ' || l_column_name || ' = ''' || l_column_name || ''' || '' '' || ' || l_column_name;
      EXECUTE IMMEDIATE l_sql;
    END LOOP;
  END;
  
  -- 合并所有列的值
  l_sql := 'SELECT * FROM YOUR_TABLE_NAME';
  DECLARE
    l_result VARCHAR2(4000);
  BEGIN
    FOR r IN (EXECUTE IMMEDIATE l_sql)
    LOOP
      l_result := '';
      FOR i IN 1..(COLUMN_VALUE_COUNT(r) - 4)
      LOOP
        l_result := l_result || r(i + 4) || ' ';
      END LOOP;
      -- 更新表格
      l_sql := 'UPDATE YOUR_TABLE_NAME SET COLUMN_NAME = ''' || l_result || ''' WHERE ROWID = ''' || r.ROWID || '''';
      EXECUTE IMMEDIATE l_sql;
    END LOOP;
  END;
END;

请将代码中的 `YOUR_TABLE_NAME` 替换成你想要操作的表名。执行该存储过程，即可实现将表除了前四列的所有列的值变成列名加值然后合并成一列的功能。