diff --git a/src/providers/mssql/qgsmssqlprovider.cpp b/src/providers/mssql/qgsmssqlprovider.cpp
index 3e72fe438ce0..ba1a3247ff83 100644
--- a/src/providers/mssql/qgsmssqlprovider.cpp
+++ b/src/providers/mssql/qgsmssqlprovider.cpp
@@ -475,6 +475,32 @@ void QgsMssqlProvider::loadFields()
   }
 }
 
+QString QgsMssqlProvider::quotedValue( const QVariant& value )
+{
+  if ( value.isNull() )
+    return "NULL";
+
+  switch ( value.type() )
+  {
+    case QVariant::Int:
+    case QVariant::LongLong:
+    case QVariant::Double:
+      return value.toString();
+
+    case QVariant::Bool:
+      return value.toBool() ? "1" : "0";
+
+    default:
+    case QVariant::String:
+      QString v = value.toString();
+      v.replace( '\'', "''" );
+      if ( v.contains( '\\' ) )
+        return v.replace( '\\', "\\\\" ).prepend( "N'" ).append( '\'' );
+      else
+        return v.prepend( '\'' ).append( '\'' );
+  }
+}
+
 QVariant QgsMssqlProvider::defaultValue( int fieldId )
 {
   if ( mDefaultValues.contains( fieldId ) )
@@ -1934,3 +1960,321 @@ QGISEXTERN QgsVectorLayerImport::ImportError createEmptyLayer(
            oldToNewAttrIdxMap, errorMessage, options
          );
 }
+QGISEXTERN bool saveStyle( const QString& uri, const QString& qmlStyle, const QString& sldStyle,
+                           const QString& styleName, const QString& styleDescription,
+                           const QString& uiFileContent, bool useAsDefault, QString& errCause )
+{
+  QgsDataSourceURI dsUri( uri );
+  // connect to database
+  QSqlDatabase mDatabase = QgsMssqlProvider::GetDatabase( dsUri.service(), dsUri.host(), dsUri.database(), dsUri.username(), dsUri.password() );
+
+  if ( !QgsMssqlProvider::OpenDatabase( mDatabase ) )
+  {
+    QgsDebugMsg( "Error connecting to database" );
+    QgsDebugMsg( mDatabase.lastError().text() );
+    return false;
+  }
+
+  QSqlQuery query = QSqlQuery( mDatabase );
+  query.setForwardOnly( true );
+  if ( !query.exec( QString( "SELECT COUNT(*) FROM information_schema.tables WHERE table_name= N'layer_styles'" ) ) )
+  {
+    QString msg = query.lastError().text();
+    QgsDebugMsg( msg );
+    return false;
+  }
+  if ( query.isActive() && query.next() && query.value( 0 ).toInt() == 0 )
+  {
+     QgsDebugMsg( "Need to create styles table" );
+     bool execOk = query.exec( QString( "CREATE TABLE [dbo].[layer_styles]("
+               "[id] int IDENTITY(1,1) PRIMARY KEY,"
+               "[f_table_catalog] [varchar](1024) NULL,"
+               "[f_table_schema] [varchar](1024) NULL,"
+               "[f_table_name] [varchar](1024) NULL,"
+               "[f_geometry_column] [varchar](1024) NULL,"
+               "[styleName] [varchar](1024) NULL,"
+               "[styleQML] [text] NULL,"
+               "[styleSLD] [text] NULL,"
+               "[useAsDefault] [int] NULL,"
+               "[description] [text] NULL,"
+               "[owner] [varchar](1024) NULL,"
+               "[ui] [text] NULL,"
+               "[update_time] [datetime] NULL"
+        ") ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]" ));
+    if ( !execOk )
+    {
+      errCause = QObject::tr( "Unable to save layer style. It's not possible to create the destination table on the database. Maybe this is due to table permissions. Please contact your database admin" );
+      return false;
+    }
+    query.finish();
+    query.clear();
+  }
+
+  QString uiFileColumn;
+  QString uiFileValue;
+  if ( !uiFileContent.isEmpty() )
+  {
+    uiFileColumn = ",ui";
+    uiFileValue = QString( ",XMLPARSE(DOCUMENT %1)" ).arg( uiFileContent );
+  }
+  QgsDebugMsg( "Ready to insert new style" );
+  // Note: in the construction of the INSERT and UPDATE strings the qmlStyle and sldStyle values
+  // can contain user entered strings, which may themselves include %## values that would be
+  // replaced by the QString.arg function.  To ensure that the final SQL string is not corrupt these
+  // two values are both replaced in the final .arg call of the string construction.
+
+  QString sql = QString( "INSERT INTO layer_styles"
+                         "(f_table_catalog,f_table_schema,f_table_name,f_geometry_column,styleName,styleQML,styleSLD,useAsDefault,description,owner%11"
+                         ") VALUES ("
+                         "%1,%2,%3,%4,%5,%6,%7,%8,%9,%10%12"
+                         ")" )
+                .arg( QgsMssqlProvider::quotedValue( dsUri.database() ) )
+                .arg( QgsMssqlProvider::quotedValue( dsUri.schema() ) )
+                .arg( QgsMssqlProvider::quotedValue( dsUri.table() ) )
+                .arg( QgsMssqlProvider::quotedValue( dsUri.geometryColumn() ) )
+                .arg( QgsMssqlProvider::quotedValue( styleName.isEmpty() ? dsUri.table() : styleName ) )
+                .arg( QgsMssqlProvider::quotedValue( qmlStyle ) )
+                .arg( QgsMssqlProvider::quotedValue( sldStyle ) )
+                .arg( useAsDefault ? "1" : "0" )
+                .arg(  QgsMssqlProvider::quotedValue( styleDescription.isEmpty() ? QDateTime::currentDateTime().toString() : styleDescription ) )
+                .arg(  QgsMssqlProvider::quotedValue( dsUri.username() ) )
+                .arg( uiFileColumn )
+                .arg( uiFileValue );
+
+  QString checkQuery = QString( "SELECT styleName"
+                                " FROM layer_styles"
+                                " WHERE f_table_catalog=%1"
+                                " AND f_table_schema=%2"
+                                " AND f_table_name=%3"
+                                " AND f_geometry_column=%4"
+                                " AND styleName=%5" )
+                       .arg( QgsMssqlProvider::quotedValue(dsUri.database() ) )
+                       .arg( QgsMssqlProvider::quotedValue(dsUri.schema() ) )
+                       .arg( QgsMssqlProvider::quotedValue(dsUri.table() ) )
+                       .arg( QgsMssqlProvider::quotedValue(dsUri.geometryColumn() ) )
+                       .arg( QgsMssqlProvider::quotedValue(styleName.isEmpty() ? dsUri.table() : styleName  ) );
+
+  if ( !query.exec( checkQuery ) )
+  {
+    QgsDebugMsg( query.lastError().text() );
+    QgsDebugMsg("Check Query failed");
+    return false;
+  }
+  if ( query.isActive() && query.next() && query.value( 0 ).toString() == styleName )
+    {
+      if ( QMessageBox::question( nullptr, QObject::tr( "Save style in database" ),
+                                QObject::tr( "A style named \"%1\" already exists in the database for this layer. Do you want to overwrite it?" )
+                                .arg( styleName.isEmpty() ? dsUri.table() : styleName ),
+                                QMessageBox::Yes | QMessageBox::No ) == QMessageBox::No )
+      {
+        errCause = QObject::tr( "Operation aborted. No changes were made in the database" );
+        QgsDebugMsg("User selected not to overwrite styles");
+        return false;
+      }
+
+    QgsDebugMsg("Updating styles");
+    sql = QString( "UPDATE layer_styles "
+                   " SET useAsDefault=%1"
+                   ",styleQML=%2"
+                   ",styleSLD=%3"
+                   ",description=%4"
+                   ",owner=%5"
+                   " WHERE f_table_catalog=%6"
+                   " AND f_table_schema=%7"
+                   " AND f_table_name=%8"
+                   " AND f_geometry_column=%9"
+                   " AND styleName=%10" )
+          .arg( useAsDefault ? "1" : "0" )
+          .arg( QgsMssqlProvider::quotedValue( qmlStyle ) )
+          .arg( QgsMssqlProvider::quotedValue( sldStyle ) )
+          .arg( QgsMssqlProvider::quotedValue( styleDescription.isEmpty() ? QDateTime::currentDateTime().toString() : styleDescription ) )
+          .arg( QgsMssqlProvider::quotedValue( dsUri.username() ) )
+          .arg( QgsMssqlProvider::quotedValue( dsUri.database() ) )
+          .arg( QgsMssqlProvider::quotedValue( dsUri.schema() ) )
+          .arg( QgsMssqlProvider::quotedValue( dsUri.table() ) )
+          .arg( QgsMssqlProvider::quotedValue( dsUri.geometryColumn() ) )
+          .arg( QgsMssqlProvider::quotedValue( styleName.isEmpty() ? dsUri.table() : styleName ) );
+  }
+  if ( useAsDefault )
+  {
+    QString removeDefaultSql = QString( "UPDATE layer_styles "
+                                        " SET useAsDefault=0"
+                                        " WHERE f_table_catalog=%1"
+                                        " AND f_table_schema=%2"
+                                        " AND f_table_name=%3"
+                                        " AND f_geometry_column=%4" )
+                               .arg( QgsMssqlProvider::quotedValue( dsUri.database() ) )
+                               .arg( QgsMssqlProvider::quotedValue( dsUri.schema() ) )
+                               .arg( QgsMssqlProvider::quotedValue( dsUri.table() ) )
+                               .arg( QgsMssqlProvider::quotedValue( dsUri.geometryColumn() ) );
+    sql = QString( "%1; %2;" ).arg( removeDefaultSql, sql );
+  }
+
+  QgsDebugMsg("Inserting styles");
+  QgsDebugMsg(sql);
+  bool execOk = query.exec( sql );
+
+  if ( !execOk )
+  {
+    errCause = QObject::tr( "Unable to save layer style. It's not possible to insert a new record into the style table. Maybe this is due to table permissions. Please contact your database administrator." );
+  }
+  return execOk;
+}
+
+
+QGISEXTERN QString loadStyle( const QString& uri, QString& errCause )
+{
+  QString style;
+  QgsDataSourceURI dsUri( uri );
+  // connect to database
+  QSqlDatabase mDatabase = QgsMssqlProvider::GetDatabase( dsUri.service(), dsUri.host(), dsUri.database(), dsUri.username(), dsUri.password() );
+
+  if ( !QgsMssqlProvider::OpenDatabase( mDatabase ) )
+  {
+    QgsDebugMsg( "Error connecting to database" );
+    QgsDebugMsg( mDatabase.lastError().text() );
+    return QString();
+  }
+
+  QSqlQuery query = QSqlQuery( mDatabase );
+  query.setForwardOnly( true );
+
+  QString selectQmlQuery = QString( "SELECT top 1 styleQML"
+                                    " FROM layer_styles"
+                                    " WHERE f_table_catalog=%1"
+                                    " AND f_table_schema=%2"
+                                    " AND f_table_name=%3"
+                                    " AND f_geometry_column=%4"
+                                    " ORDER BY useAsDefault desc" )
+                           .arg( QgsMssqlProvider::quotedValue( dsUri.database() ) )
+                           .arg( QgsMssqlProvider::quotedValue( dsUri.schema() ) )
+                           .arg( QgsMssqlProvider::quotedValue( dsUri.table() ) )
+                           .arg( QgsMssqlProvider::quotedValue( dsUri.geometryColumn() ) );
+
+   if ( !query.exec( selectQmlQuery ) )
+   {
+     QgsDebugMsg( query.lastError().text() );
+     QgsDebugMsg("Load of Style failed");
+     return QString();
+   }
+   if ( query.isActive() && query.next())
+   {
+     QString style = query.value( 0 ).toString();
+     return style;
+   }
+   return QString();
+}
+
+QGISEXTERN int listStyles( const QString &uri, QStringList &ids, QStringList &names,
+                           QStringList &descriptions, QString& errCause )
+{
+  QgsDataSourceURI dsUri( uri );
+  // connect to database
+  QSqlDatabase mDatabase = QgsMssqlProvider::GetDatabase( dsUri.service(), dsUri.host(), dsUri.database(), dsUri.username(), dsUri.password() );
+
+  if ( !QgsMssqlProvider::OpenDatabase( mDatabase ) )
+  {
+    QgsDebugMsg( "Error connecting to database" );
+    QgsDebugMsg( mDatabase.lastError().text() );
+    return -1;
+  }
+
+  QSqlQuery query = QSqlQuery( mDatabase );
+  query.setForwardOnly( true );
+
+  // check if layer_styles table already exist
+  if ( !query.exec( QString( "SELECT COUNT(*) FROM information_schema.tables WHERE table_name= N'layer_styles'" ) ) )
+  {
+    QString msg = query.lastError().text();
+    errCause = msg;
+    QgsDebugMsg( msg );
+    return -1;
+  }
+  if ( query.isActive() && query.next() && query.value( 0 ).toInt() == 0 )
+  {
+    QgsDebugMsg( QObject::tr( "No styles available on DB, or there is an error connecting to the database." ) );
+    return -1;
+  }
+
+  QString selectRelatedQuery = QString( "SELECT id,styleName,description"
+                                        " FROM layer_styles "
+                                        " WHERE f_table_catalog=%1"
+                                        " AND f_table_schema=%2"
+                                        " AND f_table_name=%3"
+                                        " AND f_geometry_column=%4" )
+                               .arg( QgsMssqlProvider::quotedValue( dsUri.database() ) )
+                               .arg( QgsMssqlProvider::quotedValue( dsUri.schema() ) )
+                               .arg( QgsMssqlProvider::quotedValue( dsUri.table() ) )
+                               .arg( QgsMssqlProvider::quotedValue( dsUri.geometryColumn() ) );
+  bool queryOk = query.exec(selectRelatedQuery);
+  if(!queryOk)
+  {
+    QgsDebugMsg( query.lastError().text() );
+    return -1;
+  }
+  int numberOfRelatedStyles = 0;
+  while( query.isActive() && query.next())
+  {
+    QgsDebugMsg(query.value(1).toString());
+    ids.append( query.value(0).toString() );
+    names.append(  query.value(1).toString() );
+    descriptions.append(  query.value(2).toString() );
+    numberOfRelatedStyles = numberOfRelatedStyles + 1;
+  }
+  QString selectOthersQuery = QString( "SELECT id,styleName,description"
+                                       " FROM layer_styles "
+                                       " WHERE NOT (f_table_catalog=%1 AND f_table_schema=%2 AND f_table_name=%3 AND f_geometry_column=%4)"
+                                       " ORDER BY update_time DESC" )
+                              .arg( QgsMssqlProvider::quotedValue( dsUri.database() ) )
+                              .arg( QgsMssqlProvider::quotedValue( dsUri.schema() ) )
+                              .arg( QgsMssqlProvider::quotedValue( dsUri.table() ) )
+                              .arg( QgsMssqlProvider::quotedValue( dsUri.geometryColumn() ) );
+  QgsDebugMsg(selectOthersQuery);
+  queryOk = query.exec(selectOthersQuery);
+  if(!queryOk)
+  {
+    QString msg = query.lastError().text();
+    QgsDebugMsg( msg );
+    return -1;
+  }
+  QgsDebugMsg(query.isActive() && query.size());
+  while(query.next())
+  {
+    ids.append( query.value(0).toString() );
+    names.append( query.value(1).toString() );
+    descriptions.append( query.value(2).toString() );
+  }
+  return numberOfRelatedStyles;
+}
+QGISEXTERN QString getStyleById( const QString& uri, QString styleId, QString& errCause )
+{
+  QgsDataSourceURI dsUri( uri );
+  // connect to database
+  QSqlDatabase mDatabase = QgsMssqlProvider::GetDatabase( dsUri.service(), dsUri.host(), dsUri.database(), dsUri.username(), dsUri.password() );
+
+  if ( !QgsMssqlProvider::OpenDatabase( mDatabase ) )
+  {
+    QgsDebugMsg( "Error connecting to database" );
+    QgsDebugMsg( mDatabase.lastError().text() );
+    return QString();
+  }
+
+  QSqlQuery query = QSqlQuery( mDatabase );
+  query.setForwardOnly( true );
+
+  QString style = "";
+  QString selectQmlQuery = QString( "SELECT styleQml FROM layer_styles WHERE id=%1" ).arg( QgsMssqlProvider::quotedValue( styleId ) );
+  bool queryOk = query.exec(selectQmlQuery);
+  if(!queryOk)
+  {
+    QString msg = query.lastError().text();
+    QgsDebugMsg( msg );
+    errCause = query.lastError().text();
+    return QString( );
+  }
+  while(query.next())
+  {
+    style = query.value(0).toString();
+  }
+  return style;
+}
diff --git a/src/providers/mssql/qgsmssqlprovider.h b/src/providers/mssql/qgsmssqlprovider.h
index 5046c97078af..090321f9e702 100644
--- a/src/providers/mssql/qgsmssqlprovider.h
+++ b/src/providers/mssql/qgsmssqlprovider.h
@@ -186,6 +186,11 @@ class QgsMssqlProvider : public QgsVectorDataProvider
      */
     bool isValid() override;
 
+    /**
+     * It returns true. Saving style to db is supported by this provider
+     */
+    virtual bool isSaveAndLoadStyleToDBSupported() override { return true; }
+
     /** Writes a list of features to the database*/
     virtual bool addFeatures( QgsFeatureList & flist ) override;
 
@@ -223,6 +228,9 @@ class QgsMssqlProvider : public QgsVectorDataProvider
     /** Convert a QgsField to work with MSSQL */
     static bool convertField( QgsField &field );
 
+    /** Convert values to quoted values for database work **/
+    static QString quotedValue( const QVariant& value );
+
     /** Returns the default value for field specified by @c fieldId */
     QVariant defaultValue( int fieldId ) override;
 
diff --git a/src/providers/postgres/qgspostgresprovider.h b/src/providers/postgres/qgspostgresprovider.h
index 59f3b63702db..3605da8f0609 100644
--- a/src/providers/postgres/qgspostgresprovider.h
+++ b/src/providers/postgres/qgspostgresprovider.h
@@ -175,7 +175,6 @@ class QgsPostgresProvider : public QgsVectorDataProvider
      */
     bool isValid() override;
 
-
     /**
      * It returns true. Saving style to db is supported by this provider
      */