Add a query count method to SQLHelper

src/db/SQLHelper.h

@@ -7,6 +7,7 @@
 
 class QSqlDatabase;
 #include "CenterAlignSqlTableModel.h"
+
 #include <QString>
 #include <QHash>
 
@@ -15,6 +16,7 @@ public:
     static bool Open();
     static bool Open(QSqlDatabase* base);
     static void Close();
+    static int QueryCount(QString sql);
     static QSqlTableModel* getTable(const QString & tableName);
 private:
     static QSqlDatabase*  defaultDatabase;