diff --git a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs
index 92344e3cb..8d8eb88bf 100644
--- a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs
+++ b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs
@@ -1011,5 +1011,19 @@ namespace SqlSugar
             var parameterNameA = mode.Args[0].MemberName;
             return $" DATE_PART('week', {parameterNameA})+1 ";
         }
+
+        public virtual string TrimEnd(MethodCallExpressionModel mode) 
+        {
+            var parameterNameA = mode.Args[0].MemberName;
+            var parameterNameB= mode.Args[1].MemberName;
+            return $" TRIM(BOTH "+ parameterNameB + " FROM "+ parameterNameA + ") ";
+        }
+        public virtual string TrimStart(MethodCallExpressionModel mode) 
+        {
+
+            var parameterNameA = mode.Args[0].MemberName;
+            var parameterNameB = mode.Args[1].MemberName;
+            return $" LTRIM(BOTH " + parameterNameB + " FROM " + parameterNameA + ") ";
+        }
     }
 }
diff --git a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs
index fb8e084bc..55acf760a 100644
--- a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs
+++ b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs
@@ -114,5 +114,7 @@ namespace SqlSugar
         string Like(MethodCallExpressionModel mode);
         string ToSingle(MethodCallExpressionModel mode);
         string WeekOfYear(MethodCallExpressionModel mode);
+        string TrimEnd(MethodCallExpressionModel mode);    
+        string TrimStart(MethodCallExpressionModel mode);
     }
 }
diff --git a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/SqlFunc.cs b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/SqlFunc.cs
index 571a165ac..e05b3ebe4 100644
--- a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/SqlFunc.cs
+++ b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/SqlFunc.cs
@@ -181,6 +181,14 @@ namespace SqlSugar
         {
             return thisValue == null ? null : thisValue.ToString().Trim();
         }
+        public static string TrimEnd(object thisValue,string trimChar)
+        {
+            throw new NotSupportedException("Can only be used in expressions");
+        }
+        public static string TrimStart(object thisValue, string trimChar)
+        {
+            throw new NotSupportedException("Can only be used in expressions");
+        }
         public static bool Contains(string thisValue, string parameterValue)
         {
             return thisValue.Contains(parameterValue);
@@ -318,6 +326,7 @@ namespace SqlSugar
         public static int BitwiseInclusiveOR(long left, long right) { throw new NotSupportedException("Can only be used in expressions"); }
         public static DateTime Oracle_ToDate(string date,string format) { throw new NotSupportedException("Can only be used in expressions"); }
         public static string Oracle_ToChar(DateTime date, string format) { throw new NotSupportedException("Can only be used in expressions"); }
+        public static string Oracle_ToChar(object objValue, string format) { throw new NotSupportedException("Can only be used in expressions"); }
         public static int SqlServer_DateDiff(string dateType,DateTime date1,DateTime date2) { throw new NotSupportedException("Can only be used in expressions"); }
 
         public static bool JsonListObjectAny(object jsonListObject, string fieldName, object value)
diff --git a/Src/Asp.NetCore2/SqlSugar/Realization/Dm/DmProvider.cs b/Src/Asp.NetCore2/SqlSugar/Realization/Dm/DmProvider.cs
index 79d14ccd4..e3ebb266a 100644
--- a/Src/Asp.NetCore2/SqlSugar/Realization/Dm/DmProvider.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Realization/Dm/DmProvider.cs
@@ -189,7 +189,7 @@ namespace SqlSugar
                     if (Parameter.ParameterName != null && Parameter.ParameterName.ToLower().IsContainsIn(KeyWord))
                     {
                         var newName = ":p" + i + 100;
-                        sql = sql.Replace(Parameter.ParameterName, newName);
+                        sql = Regex.Replace(sql, Parameter.ParameterName, newName, RegexOptions.IgnoreCase);
                         Parameter.ParameterName = newName;
                         i++;
                     }
@@ -214,7 +214,6 @@ namespace SqlSugar
 
             return sql;
         }
-
         public override Action<SqlSugarException> ErrorEvent => it =>
         {
             if (base.ErrorEvent != null)
@@ -226,6 +225,5 @@ namespace SqlSugar
                 Check.ExceptionEasy(it.Message, $"错误：可能是字段太小超出,详细错误：{it.Message} ");
             }
         };
-
     }
 }
diff --git a/Src/Asp.NetCore2/SqlSugar/Realization/Dm/SqlBuilder/DmExpressionContext.cs b/Src/Asp.NetCore2/SqlSugar/Realization/Dm/SqlBuilder/DmExpressionContext.cs
index 0010210db..528f781fa 100644
--- a/Src/Asp.NetCore2/SqlSugar/Realization/Dm/SqlBuilder/DmExpressionContext.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Realization/Dm/SqlBuilder/DmExpressionContext.cs
@@ -226,5 +226,19 @@ namespace SqlSugar
             var parameter = model.Args[0];
             return string.Format(" CAST({0} AS decimal(18,4))", parameter.MemberName);
         }
+
+        public override string TrimEnd(MethodCallExpressionModel mode)
+        {
+            var parameterNameA = mode.Args[0].MemberName;
+            var parameterNameB = mode.Args[1].MemberName;
+            return $" RTRIM({parameterNameA}, {parameterNameB}) ";
+        }
+        public override string TrimStart(MethodCallExpressionModel mode)
+        {
+
+            var parameterNameA = mode.Args[0].MemberName;
+            var parameterNameB = mode.Args[1].MemberName;
+            return $" LTRIM({parameterNameA}, {parameterNameB}) ";
+        }
     }
 }
diff --git a/Src/Asp.NetCore2/SqlSugar/Realization/MySql/SqlBuilder/MySqlExpressionContext.cs b/Src/Asp.NetCore2/SqlSugar/Realization/MySql/SqlBuilder/MySqlExpressionContext.cs
index d7a04e770..248dbea86 100644
--- a/Src/Asp.NetCore2/SqlSugar/Realization/MySql/SqlBuilder/MySqlExpressionContext.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Realization/MySql/SqlBuilder/MySqlExpressionContext.cs
@@ -245,5 +245,18 @@ namespace SqlSugar
                 return $" JSON_CONTAINS({model.Args[0].MemberName},'{{\"{model.Args[1].MemberValue}\":\"{model.Args[2].MemberValue.ObjToStringNoTrim().ToSqlFilter()}\"}}')";
             }
         }
+        public override string TrimEnd(MethodCallExpressionModel mode)
+        {
+            var parameterNameA = mode.Args[0].MemberName;
+            var parameterNameB = mode.Args[1].MemberName;
+            return $" TRIM(TRAILING {parameterNameA} FROM {parameterNameB}) ";
+        }
+        public override string TrimStart(MethodCallExpressionModel mode)
+        {
+
+            var parameterNameA = mode.Args[0].MemberName;
+            var parameterNameB = mode.Args[1].MemberName;
+            return $" TRIM(LEADING  {parameterNameA} FROM {parameterNameB}) ";
+        }
     }
 }
diff --git a/Src/Asp.NetCore2/SqlSugar/Realization/Oracle/OracleProvider.cs b/Src/Asp.NetCore2/SqlSugar/Realization/Oracle/OracleProvider.cs
index 54cf00ae4..52aca2e74 100644
--- a/Src/Asp.NetCore2/SqlSugar/Realization/Oracle/OracleProvider.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Realization/Oracle/OracleProvider.cs
@@ -134,7 +134,7 @@ namespace SqlSugar
                         if (parameters.Count(it => it.ParameterName.StartsWith(Parameter.ParameterName)) == 1)
                         {
                             var newName = Parameter.ParameterName + "_01";
-                            sql = sql.Replace(Parameter.ParameterName, newName);
+                            sql = Regex.Replace(sql, Parameter.ParameterName, newName, RegexOptions.IgnoreCase);
                             Parameter.ParameterName = newName;
                         }
                         else
diff --git a/Src/Asp.NetCore2/SqlSugar/Realization/Oracle/SqlBuilder/OracleExpressionContext.cs b/Src/Asp.NetCore2/SqlSugar/Realization/Oracle/SqlBuilder/OracleExpressionContext.cs
index 6b18de28a..f5b6d4814 100644
--- a/Src/Asp.NetCore2/SqlSugar/Realization/Oracle/SqlBuilder/OracleExpressionContext.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Realization/Oracle/SqlBuilder/OracleExpressionContext.cs
@@ -353,5 +353,18 @@ namespace SqlSugar
         {
             return string.Format("instr ({0},{1},1,1) ", model.Args[0].MemberName, model.Args[1].MemberName);
         }
+        public override string TrimEnd(MethodCallExpressionModel mode)
+        {
+            var parameterNameA = mode.Args[0].MemberName;
+            var parameterNameB = mode.Args[1].MemberName;
+            return $" RTRIM({parameterNameA}, {parameterNameB}) ";
+        }
+        public override string TrimStart(MethodCallExpressionModel mode)
+        {
+
+            var parameterNameA = mode.Args[0].MemberName;
+            var parameterNameB = mode.Args[1].MemberName;
+            return $" LTRIM({parameterNameA}, {parameterNameB}) ";
+        }
     }
 }
diff --git a/Src/Asp.NetCore2/SqlSugar/Realization/SqlServer/SqlBuilder/SqlServerExpressionContext.cs b/Src/Asp.NetCore2/SqlSugar/Realization/SqlServer/SqlBuilder/SqlServerExpressionContext.cs
index 8b098389e..21da84193 100644
--- a/Src/Asp.NetCore2/SqlSugar/Realization/SqlServer/SqlBuilder/SqlServerExpressionContext.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Realization/SqlServer/SqlBuilder/SqlServerExpressionContext.cs
@@ -109,6 +109,20 @@ namespace SqlSugar
                       , model.Args[1].MemberName
                       );
         }
+        public override string TrimEnd(MethodCallExpressionModel mode)
+        {
+            var parameterNameA = mode.Args[0].MemberName;
+            var parameterNameB = mode.Args[1].MemberName;
+            return $" RTRIM(REPLACE({parameterNameA}, {parameterNameB}, '')) ";
+        }
+        public override string TrimStart(MethodCallExpressionModel mode)
+        {
+
+            var parameterNameA = mode.Args[0].MemberName;
+            var parameterNameB = mode.Args[1].MemberName;
+            return $" LTRIM(REPLACE({parameterNameA},{parameterNameB}, ''))  ";
+        }
     }
 
+
 }
\ No newline at end of file
diff --git a/Src/Asp.NetCore2/SqlSugar/Realization/Sqlite/SqlBuilder/SqliteExpressionContext.cs b/Src/Asp.NetCore2/SqlSugar/Realization/Sqlite/SqlBuilder/SqliteExpressionContext.cs
index 3c7f00bc2..3e8f39eba 100644
--- a/Src/Asp.NetCore2/SqlSugar/Realization/Sqlite/SqlBuilder/SqliteExpressionContext.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Realization/Sqlite/SqlBuilder/SqliteExpressionContext.cs
@@ -279,7 +279,23 @@ namespace SqlSugar
 
         public override string CharIndex(MethodCallExpressionModel model)
         {
-            throw new NotSupportedException("Slqite Not Supported CharIndex");
+            var parameterNameA = model.Args[0].MemberName;
+            var parameterNameB = model.Args[1].MemberName;
+            return $" INSTR(LOWER({parameterNameA}), LOWER({parameterNameB})) ";
+        }
+
+        public override string TrimEnd(MethodCallExpressionModel mode)
+        {
+            var parameterNameA = mode.Args[0].MemberName;
+            var parameterNameB = mode.Args[1].MemberName;
+            return $" RTRIM(REPLACE({parameterNameA}, {parameterNameB}, '')) ";
+        }
+        public override string TrimStart(MethodCallExpressionModel mode)
+        {
+
+            var parameterNameA = mode.Args[0].MemberName;
+            var parameterNameB = mode.Args[1].MemberName;
+            return $" LTRIM(REPLACE({parameterNameA}, {parameterNameB}, '')) ";
         }
     }
 }