diff --git a/Src/Asp.Net/SqlSugar/Realization/Dm/SqlBuilder/DmExpressionContext.cs b/Src/Asp.Net/SqlSugar/Realization/Dm/SqlBuilder/DmExpressionContext.cs
index 3ff6f94a7..949fef2d7 100644
--- a/Src/Asp.Net/SqlSugar/Realization/Dm/SqlBuilder/DmExpressionContext.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/Dm/SqlBuilder/DmExpressionContext.cs
@@ -262,7 +262,7 @@ namespace SqlSugar
 
         public override string NewUid(MethodCallExpressionModel mode)
         {
-            return "  SYS_GUID() ";
+            return "   SUBSTR(LOWER(RAWTOHEX(SYS_GUID())), 1, 8) ||\r\n  '-' ||\r\n  SUBSTR(LOWER(RAWTOHEX(SYS_GUID())), 9, 4) ||\r\n  '-' ||\r\n  SUBSTR(LOWER(RAWTOHEX(SYS_GUID())), 13, 4) ||\r\n  '-' ||\r\n  SUBSTR(LOWER(RAWTOHEX(SYS_GUID())), 17, 4) ||\r\n  '-' ||\r\n  SUBSTR(LOWER(RAWTOHEX(SYS_GUID())), 21)  ";
         }
     }
 }
diff --git a/Src/Asp.Net/SqlSugar/Realization/Oracle/SqlBuilder/OracleExpressionContext.cs b/Src/Asp.Net/SqlSugar/Realization/Oracle/SqlBuilder/OracleExpressionContext.cs
index 34c6f1442..f48685169 100644
--- a/Src/Asp.Net/SqlSugar/Realization/Oracle/SqlBuilder/OracleExpressionContext.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/Oracle/SqlBuilder/OracleExpressionContext.cs
@@ -388,7 +388,7 @@ namespace SqlSugar
 
         public override string NewUid(MethodCallExpressionModel mode)
         {
-            return "  SYS_GUID() ";
+            return "   SUBSTR(LOWER(RAWTOHEX(SYS_GUID())), 1, 8) ||\r\n  '-' ||\r\n  SUBSTR(LOWER(RAWTOHEX(SYS_GUID())), 9, 4) ||\r\n  '-' ||\r\n  SUBSTR(LOWER(RAWTOHEX(SYS_GUID())), 13, 4) ||\r\n  '-' ||\r\n  SUBSTR(LOWER(RAWTOHEX(SYS_GUID())), 17, 4) ||\r\n  '-' ||\r\n  SUBSTR(LOWER(RAWTOHEX(SYS_GUID())), 21)  ";
         }
     }
 }