diff --git a/FreeSql.Tests/MySql/MySqlCodeFirstTest.cs b/FreeSql.Tests/MySql/MySqlCodeFirstTest.cs
index 90673eca..8f2caee6 100644
--- a/FreeSql.Tests/MySql/MySqlCodeFirstTest.cs
+++ b/FreeSql.Tests/MySql/MySqlCodeFirstTest.cs
@@ -11,21 +11,21 @@ namespace FreeSql.Tests.MySql {
 
 		[Fact]
 		public void 中文表_字段() {
-			var sql = g.mysql.CodeFirst.GetComparisonDDLStatements<测试中文表>();
-			g.mysql.CodeFirst.SyncStructure<测试中文表>();
+			var sql = g.mysql.CodeFirst.GetComparisonDDLStatements<测试中文表2>();
+			g.mysql.CodeFirst.SyncStructure<测试中文表2>();
 
-			var item = new 测试中文表 {
+			var item = new 测试中文表2 {
 				标题 = "测试标题",
 				创建时间 = DateTime.Now
 			};
-			Assert.Equal(1, g.mysql.Insert<测试中文表>().AppendData(item).ExecuteAffrows());
+			Assert.Equal(1, g.mysql.Insert<测试中文表2>().AppendData(item).ExecuteAffrows());
 			Assert.NotEqual(Guid.Empty, item.编号);
-			var item2 = g.mysql.Select<测试中文表>().Where(a => a.编号 == item.编号).First();
+			var item2 = g.mysql.Select<测试中文表2>().Where(a => a.编号 == item.编号).First();
 			Assert.NotNull(item2);
 			Assert.Equal(item.编号, item2.编号);
 			Assert.Equal(item.标题, item2.标题);
 		}
-		class 测试中文表 {
+		class 测试中文表2 {
 			[Column(IsPrimary = true)]
 			public Guid 编号 { get; set; }
 
@@ -124,7 +124,7 @@ namespace FreeSql.Tests.MySql {
   `testFieldEnum2` SET('F1','F2','F3') NOT NULL, 
   `testFieldEnum2Nullable` SET('F1','F2','F3'), 
   PRIMARY KEY (`Id`)
-) Engine=InnoDB CHARACTER SET utf8;
+) Engine=InnoDB;
 ", sql);
 			}
 
diff --git a/FreeSql.Tests/Oracle/OracleCodeFirstTest.cs b/FreeSql.Tests/Oracle/OracleCodeFirstTest.cs
index 5bf2a0d3..32b94b6f 100644
--- a/FreeSql.Tests/Oracle/OracleCodeFirstTest.cs
+++ b/FreeSql.Tests/Oracle/OracleCodeFirstTest.cs
@@ -125,7 +125,7 @@ namespace FreeSql.Tests.Oracle {
   `Enum2` SET('F1','F2','F3') NOT NULL, 
   `Enum2Nullable` SET('F1','F2','F3'), 
   PRIMARY KEY (`Id`)
-) Engine=InnoDB CHARACTER SET utf8;
+) Engine=InnoDB;
 ", sql);
 			}
 
diff --git a/FreeSql/MySql/MySqlCodeFirst.cs b/FreeSql/MySql/MySqlCodeFirst.cs
index 0fc738cf..62fa7285 100644
--- a/FreeSql/MySql/MySqlCodeFirst.cs
+++ b/FreeSql/MySql/MySqlCodeFirst.cs
@@ -112,7 +112,7 @@ namespace FreeSql.MySql {
 					var tboldname = tb.DbOldName?.Split(new[] { '.' }, 2); //鏃ц〃鍚�
 					if (tboldname?.Length == 1) tboldname = new[] { database, tboldname[0] };
 
-					if (string.Compare(tbname[0], database, true) != 0 && ExecuteScalar(database, _commonUtils.FormatSql(" select 1 from pg_database where datname={0}", tbname[0])) == null) //鍒涘缓鏁版嵁搴�
+					if (string.Compare(tbname[0], database, true) != 0 && ExecuteScalar(database, _commonUtils.FormatSql(" select 1 from information_schema.schemata where schema_name={0}", tbname[0])) == null) //鍒涘缓鏁版嵁搴�
 						sb.Append($"CREATE DATABASE IF NOT EXISTS ").Append(_commonUtils.QuoteSqlName(tbname[0])).Append(" default charset utf8 COLLATE utf8_general_ci;\r\n");
 
 					var sbalter = new StringBuilder();
@@ -144,7 +144,7 @@ namespace FreeSql.MySql {
 								sb.Remove(sb.Length - 2, 2).Append("),");
 							}
 							sb.Remove(sb.Length - 1, 1);
-							sb.Append("\r\n) Engine=InnoDB CHARACTER SET utf8;\r\n");
+							sb.Append("\r\n) Engine=InnoDB;\r\n");
 							continue;
 						}
 						//濡傛灉鏂拌〃锛屾棫琛ㄥ湪涓�涓暟鎹簱涓嬶紝鐩存帴淇敼琛ㄥ悕
@@ -251,7 +251,7 @@ where a.constraint_schema IN ({0}) and a.table_name IN ({1})", tboldname ?? tbna
 						sb.Remove(sb.Length - 2, 2).Append("),");
 					}
 					sb.Remove(sb.Length - 1, 1);
-					sb.Append("\r\n) Engine=InnoDB CHARACTER SET utf8;\r\n");
+					sb.Append("\r\n) Engine=InnoDB;\r\n");
 					sb.Append("INSERT INTO ").Append(tmptablename).Append(" (");
 					foreach (var tbcol in tb.Columns.Values)
 						sb.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", ");