From d2c3907b5f1c0f6cbefb62ab685bb9065b415fe3 Mon Sep 17 00:00:00 2001
From: sunkaixuna <610262374@qq.com>
Date: Sat, 4 Sep 2021 08:49:39 +0800
Subject: [PATCH] Update  dm  db.Updateable

---
 .../SqlSugar/Realization/Dm/SqlBuilder/DmUpdateBuilder.cs  | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Src/Asp.Net/SqlSugar/Realization/Dm/SqlBuilder/DmUpdateBuilder.cs b/Src/Asp.Net/SqlSugar/Realization/Dm/SqlBuilder/DmUpdateBuilder.cs
index 247ac6045..c4cb28bb1 100644
--- a/Src/Asp.Net/SqlSugar/Realization/Dm/SqlBuilder/DmUpdateBuilder.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/Dm/SqlBuilder/DmUpdateBuilder.cs
@@ -27,7 +27,12 @@ namespace SqlSugar
                 i++;
                 return string.Format("{0} {1} WHERE {2};", updateTable, setValues, string.Join("AND", whereList));
             }).ToArray()));
-            return sb.ToString();
+            var result= sb.ToString();
+            if (result == "\r\n") 
+            {
+                return null;
+            }
+            return result;
         }
 
         private string GetOracleUpdateColums(int i, DbColumnInfo m)