diff --git a/Src/Asp.Net/SqlSugar/Realization/Kdbndp/DbBind/KdbndpBind.cs b/Src/Asp.Net/SqlSugar/Realization/Kdbndp/DbBind/KdbndpBind.cs
index e870c7d2c..17b5763d6 100644
--- a/Src/Asp.Net/SqlSugar/Realization/Kdbndp/DbBind/KdbndpBind.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/Kdbndp/DbBind/KdbndpBind.cs
@@ -99,6 +99,7 @@ namespace SqlSugar
                     new KeyValuePair<string, CSharpDataType>("name",CSharpDataType.@string),
                     new KeyValuePair<string, CSharpDataType>("text",CSharpDataType.@string),
                     new KeyValuePair<string, CSharpDataType>("char",CSharpDataType.@string),
+                    new KeyValuePair<string, CSharpDataType>("nchar",CSharpDataType.@string),
                     new KeyValuePair<string, CSharpDataType>("character",CSharpDataType.@string),
                     new KeyValuePair<string, CSharpDataType>("cidr",CSharpDataType.@string),
                     new KeyValuePair<string, CSharpDataType>("circle",CSharpDataType.@string),
diff --git a/Src/Asp.Net/SqlSugar/Realization/Kdbndp/SqlBuilder/KdbndpExpressionContext.cs b/Src/Asp.Net/SqlSugar/Realization/Kdbndp/SqlBuilder/KdbndpExpressionContext.cs
index 700a58eb5..c4f6f5000 100644
--- a/Src/Asp.Net/SqlSugar/Realization/Kdbndp/SqlBuilder/KdbndpExpressionContext.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/Kdbndp/SqlBuilder/KdbndpExpressionContext.cs
@@ -222,6 +222,10 @@ namespace SqlSugar
 
         public override string Contains(MethodCallExpressionModel model)
         {
+            if (IsSqlServerModel(model)) 
+            {
+                return base.Contains(model);
+            }
             var parameter = model.Args[0];
             var parameter2 = model.Args[1];
             return string.Format(" ({0} like pg_catalog.concat('%',{1},'%')) ", parameter.MemberName, parameter2.MemberName);
@@ -229,6 +233,10 @@ namespace SqlSugar
 
         public override string StartsWith(MethodCallExpressionModel model)
         {
+            if (IsSqlServerModel(model))
+            {
+                return base.StartsWith(model);
+            }
             var parameter = model.Args[0];
             var parameter2 = model.Args[1];
             return string.Format(" ({0} like pg_catalog.concat({1},'%')) ", parameter.MemberName, parameter2.MemberName);
@@ -236,6 +244,10 @@ namespace SqlSugar
 
         public override string EndsWith(MethodCallExpressionModel model)
         {
+            if (IsSqlServerModel(model))
+            {
+                return base.EndsWith(model);
+            }
             var parameter = model.Args[0];
             var parameter2 = model.Args[1];
             return string.Format(" ({0} like pg_catalog.concat('%',{1}))", parameter.MemberName, parameter2.MemberName);
@@ -300,6 +312,10 @@ namespace SqlSugar
         }
         public override string DateAddByType(MethodCallExpressionModel model)
         {
+            if (IsSqlServerModel(model))
+            {
+                return base.DateAddByType(model);
+            }
             var parameter = model.Args[0];
             var parameter2 = model.Args[1];
             var parameter3 = model.Args[2];
@@ -312,6 +328,10 @@ namespace SqlSugar
 
         public override string DateAddDay(MethodCallExpressionModel model)
         {
+            if (IsSqlServerModel(model)) 
+            {
+                return base.DateAddDay(model);
+            }
             var parameter = model.Args[0];
             var parameter2 = model.Args[1];
             return string.Format(" ({0} + ({1}||'day')::INTERVAL) ", parameter.MemberName, parameter2.MemberName);
@@ -494,5 +514,11 @@ namespace SqlSugar
             }
             return $" to_char({dateValue},'{formatString}') ";
         }
+
+        private static bool IsSqlServerModel(MethodCallExpressionModel model)
+        {
+            return model?.Conext?.SugarContext?.Context?.CurrentConnectionConfig?.MoreSettings?.DatabaseModel == DbType.SqlServer;
+        }
+
     }
 }
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