diff --git a/FreeSql.Tests/UnitTest1.cs b/FreeSql.Tests/UnitTest1.cs
index 12a9e174..607046f3 100644
--- a/FreeSql.Tests/UnitTest1.cs
+++ b/FreeSql.Tests/UnitTest1.cs
@@ -44,6 +44,9 @@ namespace FreeSql.Tests {
 		[Fact]
 		public void Test1() {
 
+			var sql111 = g.sqlite.Select<TestUser>().AsTable((a, b) => "(select * from TestUser where stringid > 10)").Page(1, 10).ToSql();
+			
+
 			var xxx = g.sqlite.Select<TestUser>().GroupBy(a => new { a.stringid }).ToList(a => a.Key.stringid);
 
 			var tuser = g.sqlite.Select<TestUser>().Where(u => u.accname == "admin")
diff --git a/FreeSql/MySql/MySqlUtils.cs b/FreeSql/MySql/MySqlUtils.cs
index 0fd846f3..6e926867 100644
--- a/FreeSql/MySql/MySqlUtils.cs
+++ b/FreeSql/MySql/MySqlUtils.cs
@@ -42,7 +42,12 @@ namespace FreeSql.MySql {
 			});
 
 		internal override string FormatSql(string sql, params object[] args) => sql?.FormatMySql(args);
-		internal override string QuoteSqlName(string name) => $"`{name.Trim('`').Replace(".", "`.`")}`";
+		internal override string QuoteSqlName(string name) {
+			var nametrim = name.Trim();
+			if (nametrim.StartsWith("(") && nametrim.EndsWith(")"))
+				return nametrim; //原生SQL
+			return $"`{nametrim.Trim('`').Replace(".", "`.`")}`";
+		}
 		internal override string QuoteParamterName(string name) => $"?{(_orm.CodeFirst.IsSyncStructureToLower ? name.ToLower() : name)}";
 		internal override string IsNull(string sql, object value) => $"ifnull({sql}, {value})";
 		internal override string StringConcat(string left, string right, Type leftType, Type rightType) => $"concat({left}, {right})";
diff --git a/FreeSql/Oracle/OracleUtils.cs b/FreeSql/Oracle/OracleUtils.cs
index d5b5d377..e1ea4f42 100644
--- a/FreeSql/Oracle/OracleUtils.cs
+++ b/FreeSql/Oracle/OracleUtils.cs
@@ -38,7 +38,12 @@ namespace FreeSql.Oracle {
 			});
 
 		internal override string FormatSql(string sql, params object[] args) => sql?.FormatOracleSQL(args);
-		internal override string QuoteSqlName(string name) => $"\"{name.Trim('"').Replace(".", "\".\"")}\"";
+		internal override string QuoteSqlName(string name) {
+			var nametrim = name.Trim();
+			if (nametrim.StartsWith("(") && nametrim.EndsWith(")"))
+				return nametrim; //原生SQL
+			return $"\"{nametrim.Trim('"').Replace(".", "\".\"")}\"";
+		}
 		internal override string QuoteParamterName(string name) => $":{(_orm.CodeFirst.IsSyncStructureToLower ? name.ToLower() : name)}";
 		internal override string IsNull(string sql, object value) => $"nvl({sql}, {value})";
 		internal override string StringConcat(string left, string right, Type leftType, Type rightType) => $"{left} || {right}";
diff --git a/FreeSql/PostgreSQL/PostgreSQLUtils.cs b/FreeSql/PostgreSQL/PostgreSQLUtils.cs
index d689d1d7..b74915a2 100644
--- a/FreeSql/PostgreSQL/PostgreSQLUtils.cs
+++ b/FreeSql/PostgreSQL/PostgreSQLUtils.cs
@@ -97,7 +97,12 @@ namespace FreeSql.PostgreSQL {
 			});
 
 		internal override string FormatSql(string sql, params object[] args) => sql?.FormatPostgreSQL(args);
-		internal override string QuoteSqlName(string name) => $"\"{name.Trim('"').Replace(".", "\".\"")}\"";
+		internal override string QuoteSqlName(string name) {
+			var nametrim = name.Trim();
+			if (nametrim.StartsWith("(") && nametrim.EndsWith(")"))
+				return nametrim; //原生SQL
+			return $"\"{nametrim.Trim('"').Replace(".", "\".\"")}\"";
+		}
 		internal override string QuoteParamterName(string name) => $"@{(_orm.CodeFirst.IsSyncStructureToLower ? name.ToLower() : name)}";
 		internal override string IsNull(string sql, object value) => $"coalesce({sql}, {value})";
 		internal override string StringConcat(string left, string right, Type leftType, Type rightType) => $"{left} || {right}";
diff --git a/FreeSql/SqlServer/SqlServerUtils.cs b/FreeSql/SqlServer/SqlServerUtils.cs
index 9705900e..6c65db4a 100644
--- a/FreeSql/SqlServer/SqlServerUtils.cs
+++ b/FreeSql/SqlServer/SqlServerUtils.cs
@@ -35,7 +35,12 @@ namespace FreeSql.SqlServer {
 			});
 
 		internal override string FormatSql(string sql, params object[] args) => sql?.FormatSqlServer(args);
-		internal override string QuoteSqlName(string name) => $"[{name.TrimStart('[').TrimEnd(']').Replace(".", "].[")}]";
+		internal override string QuoteSqlName(string name) {
+			var nametrim = name.Trim();
+			if (nametrim.StartsWith("(") && nametrim.EndsWith(")"))
+				return nametrim; //原生SQL
+			return $"[{nametrim.TrimStart('[').TrimEnd(']').Replace(".", "].[")}]";
+		}
 		internal override string QuoteParamterName(string name) => $"@{(_orm.CodeFirst.IsSyncStructureToLower ? name.ToLower() : name)}";
 		internal override string IsNull(string sql, object value) => $"isnull({sql}, {value})";
 		internal override string StringConcat(string left, string right, Type leftType, Type rightType) => $"{(leftType.FullName == "System.String" ? left : $"cast({left} as nvarchar)")} + {(rightType.FullName == "System.String" ? right : $"cast({right} as nvarchar)")}";
diff --git a/FreeSql/Sqlite/SqliteUtils.cs b/FreeSql/Sqlite/SqliteUtils.cs
index 6ff93ed9..3a8bea39 100644
--- a/FreeSql/Sqlite/SqliteUtils.cs
+++ b/FreeSql/Sqlite/SqliteUtils.cs
@@ -53,7 +53,12 @@ namespace FreeSql.Sqlite {
 			});
 
 		internal override string FormatSql(string sql, params object[] args) => sql?.FormatSqlite(args);
-		internal override string QuoteSqlName(string name) => $"\"{name.Trim('"').Replace(".", "\".\"")}\"";
+		internal override string QuoteSqlName(string name) {
+			var nametrim = name.Trim();
+			if (nametrim.StartsWith("(") && nametrim.EndsWith(")"))
+				return nametrim; //原生SQL
+			return $"\"{nametrim.Trim('"').Replace(".", "\".\"")}\"";
+		}
 		internal override string QuoteParamterName(string name) => $"@{(_orm.CodeFirst.IsSyncStructureToLower ? name.ToLower() : name)}";
 		internal override string IsNull(string sql, object value) => $"ifnull({sql}, {value})";
 		internal override string StringConcat(string left, string right, Type leftType, Type rightType) => $"{left} || {right}";