fix: db2 sql 数据集抽取错误

backend/src/main/java/io/dataease/provider/query/db2/Db2QueryProvider.java

@@ -681,7 +681,7 @@ public class Db2QueryProvider extends QueryProvider {
     public String createRawQuerySQL(String table, List<DatasetTableField> fields, Datasource ds) {
         String[] array = fields.stream().map(f -> {
             StringBuilder stringBuilder = new StringBuilder();
-            stringBuilder.append("\"").append(f.getOriginName()).append("\" AS ").append(f.getDataeaseName());
+            stringBuilder.append(" \"").append(f.getOriginName()).append("\"");
             return stringBuilder.toString();
         }).toArray(String[]::new);
         if(ds!= null){