diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/EnrollmentDAOImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/EnrollmentDAOImpl.java
index f3a5a585117..61e99798023 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/EnrollmentDAOImpl.java
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/EnrollmentDAOImpl.java
@@ -71,6 +71,7 @@ public class EnrollmentDAOImpl implements EnrollmentDAO {
         PreparedStatement stmt = null;
         ResultSet rs = null;
         int status = -1;
+        int rows;
         try {
             conn = this.getConnection();
             String sql = "UPDATE DM_ENROLMENT SET OWNERSHIP = ?, STATUS = ?, " +
@@ -85,12 +86,12 @@ public class EnrollmentDAOImpl implements EnrollmentDAO {
             stmt.setString(6, enrolmentInfo.getOwner());
             stmt.setInt(7, tenantId);
             stmt.setInt(8, enrolmentInfo.getId());
-            stmt.executeUpdate();
+            rows = stmt.executeUpdate();
 
-            rs = stmt.getGeneratedKeys();
-            if (rs.next()) {
+            if (rows > 0) {
                 status = 1;
             }
+
             return status;
         } catch (SQLException e) {
             throw new DeviceManagementDAOException("Error occurred while updating enrolment configuration", e);
diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/CommandOperationDAOImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/CommandOperationDAOImpl.java
index d65835a7608..e5663b38445 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/CommandOperationDAOImpl.java
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/CommandOperationDAOImpl.java
@@ -59,7 +59,7 @@ public class CommandOperationDAOImpl extends OperationDAOImpl {
         try {
             Connection connection = OperationManagementDAOFactory.getConnection();
             stmt = connection.prepareStatement(
-                    "UPDATE DM_COMMAND_OPERATION O SET O.ENABLED = ? WHERE O.OPERATION_ID = ?");
+                    "UPDATE DM_COMMAND_OPERATION SET ENABLED = ? WHERE OPERATION_ID = ?");
             stmt.setBoolean(1, operation.isEnabled());
             stmt.setInt(2, operation.getId());
             stmt.executeUpdate();
diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/ConfigOperationDAOImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/ConfigOperationDAOImpl.java
index be3b1ab7880..f56bbff51b4 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/ConfigOperationDAOImpl.java
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/ConfigOperationDAOImpl.java
@@ -82,8 +82,8 @@ public class ConfigOperationDAOImpl extends OperationDAOImpl {
         try {
             super.updateOperation(operation);
             Connection connection = OperationManagementDAOFactory.getConnection();
-            stmt = connection.prepareStatement("UPDATE DM_CONFIG_OPERATION O SET O.OPERATION_CONFIG = ? " +
-                    "WHERE O.OPERATION_ID = ?");
+            stmt = connection.prepareStatement("UPDATE DM_CONFIG_OPERATION SET OPERATION_CONFIG = ? " +
+                    "WHERE OPERATION_ID = ?");
             bao = new ByteArrayOutputStream();
             oos = new ObjectOutputStream(bao);
             oos.writeObject(operation);
diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/OperationDAOImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/OperationDAOImpl.java
index 97e140fd909..90c0565c2eb 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/OperationDAOImpl.java
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/OperationDAOImpl.java
@@ -70,8 +70,8 @@ public class OperationDAOImpl implements OperationDAO {
         PreparedStatement stmt = null;
         try {
             Connection connection = OperationManagementDAOFactory.getConnection();
-            stmt = connection.prepareStatement("UPDATE DM_OPERATION O SET O.RECEIVED_TIMESTAMP=? " +
-                    "WHERE O.ID=?");
+            stmt = connection.prepareStatement("UPDATE DM_OPERATION SET RECEIVED_TIMESTAMP=? " +
+                    "WHERE ID=?");
             stmt.setTimestamp(1, new Timestamp(new Date().getTime()));
             stmt.setInt(2, operation.getId());
             stmt.executeUpdate();
@@ -87,8 +87,8 @@ public class OperationDAOImpl implements OperationDAO {
         PreparedStatement stmt = null;
         try {
             Connection connection = OperationManagementDAOFactory.getConnection();
-            stmt = connection.prepareStatement("UPDATE DM_ENROLMENT_OP_MAPPING O SET O.STATUS=? " +
-                    "WHERE O.ENROLMENT_ID=? and O.OPERATION_ID=?");
+            stmt = connection.prepareStatement("UPDATE DM_ENROLMENT_OP_MAPPING SET STATUS=? " +
+                    "WHERE ENROLMENT_ID=? and OPERATION_ID=?");
             stmt.setString(1, status.toString());
             stmt.setInt(2, enrolmentId);
             stmt.setInt(3, operationId);
diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/PolicyOperationDAOImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/PolicyOperationDAOImpl.java
index 1bff85ae61c..6b2a848809e 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/PolicyOperationDAOImpl.java
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/PolicyOperationDAOImpl.java
@@ -90,8 +90,8 @@ public class PolicyOperationDAOImpl extends OperationDAOImpl {
         try {
             super.updateOperation(operation);
             Connection connection = OperationManagementDAOFactory.getConnection();
-            stmt = connection.prepareStatement("UPDATE DM_POLICY_OPERATION O SET O.OPERATION_DETAILS=? " +
-                    "WHERE O.OPERATION_ID=?");
+            stmt = connection.prepareStatement("UPDATE DM_POLICY_OPERATION SET OPERATION_DETAILS=? " +
+                    "WHERE OPERATION_ID=?");
             bao = new ByteArrayOutputStream();
             oos = new ObjectOutputStream(bao);
             oos.writeObject(operation);
diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/ProfileOperationDAOImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/ProfileOperationDAOImpl.java
index 04e39eef98a..a82e7c5e5f4 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/ProfileOperationDAOImpl.java
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/ProfileOperationDAOImpl.java
@@ -90,8 +90,8 @@ public class ProfileOperationDAOImpl extends OperationDAOImpl {
         try {
             super.updateOperation(operation);
             Connection connection = OperationManagementDAOFactory.getConnection();
-            stmt = connection.prepareStatement("UPDATE DM_PROFILE_OPERATION O SET O.OPERATION_DETAILS=? " +
-                    "WHERE O.OPERATION_ID=?");
+            stmt = connection.prepareStatement("UPDATE DM_PROFILE_OPERATION SET OPERATION_DETAILS=? " +
+                    "WHERE OPERATION_ID=?");
 
             bao = new ByteArrayOutputStream();
             oos = new ObjectOutputStream(bao);