diff --git a/chat2db-server/chat2db-plugins/chat2db-oracle/src/main/java/ai/chat2db/plugin/oracle/OracleDBManage.java b/chat2db-server/chat2db-plugins/chat2db-oracle/src/main/java/ai/chat2db/plugin/oracle/OracleDBManage.java
index f6a86878..6d246a78 100644
--- a/chat2db-server/chat2db-plugins/chat2db-oracle/src/main/java/ai/chat2db/plugin/oracle/OracleDBManage.java
+++ b/chat2db-server/chat2db-plugins/chat2db-oracle/src/main/java/ai/chat2db/plugin/oracle/OracleDBManage.java
@@ -21,9 +21,9 @@ public class OracleDBManage extends DefaultDBManage implements DBManage {
         }
         String schemaName = connectInfo.getSchemaName();
         try {
-            SQLExecutor.getInstance().execute(connection, "ALTER SESSION SET CURRENT_SCHEMA = \"" + schemaName + "\";");
+            SQLExecutor.getInstance().execute(connection, "ALTER SESSION SET CURRENT_SCHEMA = \"" + schemaName + "\"");
         } catch (SQLException e) {
-
+            e.printStackTrace();
         }
     }
 
diff --git a/chat2db-server/chat2db-plugins/chat2db-oracle/src/main/java/ai/chat2db/plugin/oracle/type/OracleIndexTypeEnum.java b/chat2db-server/chat2db-plugins/chat2db-oracle/src/main/java/ai/chat2db/plugin/oracle/type/OracleIndexTypeEnum.java
index f408f189..ae150f1c 100644
--- a/chat2db-server/chat2db-plugins/chat2db-oracle/src/main/java/ai/chat2db/plugin/oracle/type/OracleIndexTypeEnum.java
+++ b/chat2db-server/chat2db-plugins/chat2db-oracle/src/main/java/ai/chat2db/plugin/oracle/type/OracleIndexTypeEnum.java
@@ -81,7 +81,7 @@ public enum OracleIndexTypeEnum {
         for (TableIndexColumn column : tableIndex.getColumnList()) {
             if (StringUtils.isNotBlank(column.getColumnName())) {
                 script.append("\"").append(column.getColumnName()).append("\"");
-                if (!StringUtils.isBlank(column.getAscOrDesc())) {
+                if (!StringUtils.isBlank(column.getAscOrDesc()) && !PRIMARY_KEY.equals(this)) {
                     script.append(" ").append(column.getAscOrDesc());
                 }
                 script.append(",");
@@ -111,7 +111,8 @@ public enum OracleIndexTypeEnum {
 
     private String buildDropIndex(TableIndex tableIndex) {
         if (OracleIndexTypeEnum.PRIMARY_KEY.getName().equals(tableIndex.getType())) {
-            return StringUtils.join("DROP PRIMARY KEY");
+            String tableName = "\"" + tableIndex.getSchemaName() + "\"." + "\"" + tableIndex.getTableName() + "\"";
+            return StringUtils.join("ALTER TABLE ",tableName," DROP PRIMARY KEY");
         }
         StringBuilder script = new StringBuilder();
         script.append("DROP INDEX ");
diff --git a/chat2db-server/chat2db-plugins/chat2db-sqlserver/pom.xml b/chat2db-server/chat2db-plugins/chat2db-sqlserver/pom.xml
index d040a7fe..9d926c4d 100644
--- a/chat2db-server/chat2db-plugins/chat2db-sqlserver/pom.xml
+++ b/chat2db-server/chat2db-plugins/chat2db-sqlserver/pom.xml
@@ -17,12 +17,12 @@
             <groupId>ai.chat2db</groupId>
             <artifactId>chat2db-spi</artifactId>
         </dependency>
-        <dependency>
-            <groupId>com.microsoft.sqlserver</groupId>
-            <artifactId>mssql-jdbc</artifactId>
-            <version>11.2.1.jre17</version>
-            <scope>test</scope>
-        </dependency>
+<!--        <dependency>-->
+<!--            <groupId>com.microsoft.sqlserver</groupId>-->
+<!--            <artifactId>mssql-jdbc</artifactId>-->
+<!--            <version>11.2.1.jre17</version>-->
+<!--            <scope>test</scope>-->
+<!--        </dependency>-->
     </dependencies>
 
 </project>
\ No newline at end of file