diff --git a/migration-tool/src/main/java/org/full/migration/jdbc/SqlServerConnection.java b/migration-tool/src/main/java/org/full/migration/jdbc/SqlServerConnection.java
index 5263b82e2441caab85401264ffcfaf8d94d35ad9..758ae08701a50a0768d4eacef91de9739750628a 100644
--- a/migration-tool/src/main/java/org/full/migration/jdbc/SqlServerConnection.java
+++ b/migration-tool/src/main/java/org/full/migration/jdbc/SqlServerConnection.java
@@ -38,11 +38,12 @@ public Connection getConnection(DatabaseConfig dbConfig) throws SQLException {
         String url = String.format(Locale.ROOT, SQLSERVER_URL, dbConfig.getHost(), dbConfig.getPort(),
             dbConfig.getDatabase());
         try {
+            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
             return DriverManager.getConnection(url, dbConfig.getUser(), dbConfig.getPassword());
-        } catch (SQLException e) {
+        } catch (SQLException | ClassNotFoundException e) {
             LOGGER.error("fail to create sql server connection, host:{}, port:{}, please check.", dbConfig.getHost(),
                 dbConfig.getPort());
-            throw e;
+            throw new SQLException(e.getMessage());
         }
     }
 
diff --git a/migration-tool/src/main/java/org/full/migration/source/SourceDatabase.java b/migration-tool/src/main/java/org/full/migration/source/SourceDatabase.java
index d5252fed534b8fae488ac4d6a7a3debb2dda6b08..a43fcba2c47c5f4d869490ff7744a5bdf4970111 100644
--- a/migration-tool/src/main/java/org/full/migration/source/SourceDatabase.java
+++ b/migration-tool/src/main/java/org/full/migration/source/SourceDatabase.java
@@ -250,6 +250,7 @@ public void queryTables(Set<String> schemaSet) {
             if (isDumpJson) {
                 ProgressTracker.getInstance().recordTableProgress();
             }
+            LOGGER.info("success to query all tables...");
         } catch (SQLException e) {
             LOGGER.error("fail to query table list, error message:{}.", e.getMessage());
         }