diff --git a/Hadoop/ZKLT.Hadoop/TableService.cs b/Hadoop/ZKLT.Hadoop/TableService.cs
index daf6ee9..676f11c 100644
--- a/Hadoop/ZKLT.Hadoop/TableService.cs
+++ b/Hadoop/ZKLT.Hadoop/TableService.cs
@@ -46,12 +46,12 @@ namespace ZKLT.Hadoop
                                 if (row![_column.Key!] != null) {
                                     var _betweendata = JsonConvert.DeserializeObject<object[]>(JsonConvert.SerializeObject(row![_column.Key!]));
                                     if (_betweendata != null) {
-                                        if (_betweendata[0] != null)
+                                        if (_betweendata[0] != null && _betweendata[0].ToString() != "")
                                         {
                                             _wherestr.Append($@" AND `{_column.Key!}` >= @{_column.Key!}0");
                                             param.Add(_column.Key! + "0", _betweendata[0]);
                                         }
-                                        if (_betweendata[1] != null)
+                                        if (_betweendata[1] != null && _betweendata[1].ToString() != "")
                                         {
                                             _wherestr.Append($@" AND `{_column.Key!}` <= @{_column.Key!}1");
                                             param.Add(_column.Key! + "1", _betweendata[1]);