diff --git a/backend/src/main/java/com/yfd/platform/datasource/DynamicDataSourceRegistry.java b/backend/src/main/java/com/yfd/platform/datasource/DynamicDataSourceRegistry.java
index d39ccce2..a0cc2dff 100644
--- a/backend/src/main/java/com/yfd/platform/datasource/DynamicDataSourceRegistry.java
+++ b/backend/src/main/java/com/yfd/platform/datasource/DynamicDataSourceRegistry.java
@@ -200,8 +200,9 @@ public class DynamicDataSourceRegistry {
                 ? conf.getConnTimeout() : 30000L;
         ds.setMaxWait(connTimeout);
 
-        // 通用连接池配置
-        ds.setValidationQuery("SELECT 1");
+        // 通用连接池配置：根据 URL 自动选择正确的 validationQuery
+        // Oracle 需要 SELECT 1 FROM DUAL，DM/MySQL/PostgreSQL 用 SELECT 1 即可
+        ds.setValidationQuery(resolveValidationQuery(driver, conf.getUrl()));
         ds.setValidationQueryTimeout(3);
         ds.setTestWhileIdle(true);
         ds.setTestOnBorrow(false);
@@ -254,6 +255,24 @@ public class DynamicDataSourceRegistry {
         throw new IllegalArgumentException("无法根据 URL 自动识别驱动类型: " + url);
     }
 
+    /**
+     * 根据驱动/URL 自动选择正确的 validationQuery
+     * <ul>
+     *   <li>Oracle → {@code SELECT 1 FROM DUAL}</li>
+     *   <li>DM / MySQL / PostgreSQL / SQLServer → {@code SELECT 1}</li>
+     * </ul>
+     */
+    private String resolveValidationQuery(String driverClassName, String url) {
+        String lowerDriver = driverClassName != null ? driverClassName.toLowerCase() : "";
+        String lowerUrl = url != null ? url.toLowerCase() : "";
+        // Oracle 驱动
+        if (lowerDriver.contains("oracle") || lowerUrl.contains("jdbc:oracle")) {
+            return "SELECT 1 FROM DUAL";
+        }
+        // 其他数据库（DM / MySQL / PostgreSQL / SQLServer 等）通用
+        return "SELECT 1";
+    }
+
     /**
      * 将数据库行映射为实体
      */