diff --git a/mybatis-flex-core/src/main/java/com/mybatisflex/core/constant/FuncName.java b/mybatis-flex-core/src/main/java/com/mybatisflex/core/constant/FuncName.java
new file mode 100644
index 00000000..c77ac6cc
--- /dev/null
+++ b/mybatis-flex-core/src/main/java/com/mybatisflex/core/constant/FuncName.java
@@ -0,0 +1,149 @@
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.mybatisflex.core.constant;
+
+/**
+ * 支持的 SQL 函数名。
+ *
+ * @author 王帅
+ * @since 2023-07-03
+ */
+public class FuncName {
+
+    public static final String ABS = "ABS";
+    public static final String ACOS = "ACOS";
+    public static final String ADDDATE = "ADDDATE";
+    public static final String ADDTIME = "ADDTIME";
+    public static final String ASCII = "ASCII";
+    public static final String ASIN = "ASIN";
+    public static final String ATAN = "ATAN";
+    public static final String AVG = "AVG";
+    public static final String BIN = "BIN";
+    public static final String CEIL = "CEIL";
+    public static final String CEILING = "CEILING";
+    public static final String CHARSET = "CHARSET";
+    public static final String CHAR_LENGTH = "CHAR_LENGTH";
+    public static final String COLLATION = "COLLATION";
+    public static final String CONCAT = "CONCAT";
+    public static final String CONCAT_WS = "CONCAT_WS";
+    public static final String CONNECTION_ID = "CONNECTION_ID";
+    public static final String CONV = "CONV";
+    public static final String CONVERT = "CONVERT";
+    public static final String COS = "COS";
+    public static final String COT = "COT";
+    public static final String COUNT = "COUNT";
+    public static final String CURDATE = "CURDATE";
+    public static final String CURRENT_DATE = "CURRENT_DATE";
+    public static final String CURRENT_TIME = "CURRENT_TIME";
+    public static final String CURRENT_TIMESTAMP = "CURRENT_TIMESTAMP";
+    public static final String CURTIME = "CURTIME";
+    public static final String DATABASE = "DATABASE";
+    public static final String DATEDIFF = "DATEDIFF";
+    public static final String DATE_FORMAT = "DATE_FORMAT";
+    public static final String DAY = "DAY";
+    public static final String DAYNAME = "DAYNAME";
+    public static final String DAYOFMONTH = "DAYOFMONTH";
+    public static final String DAYOFWEEK = "DAYOFWEEK";
+    public static final String DAYOFYEAR = "DAYOFYEAR";
+    public static final String DECODE = "DECODE";
+    public static final String DEGREES = "DEGREES";
+    public static final String ELT = "ELT";
+    public static final String ENCODE = "ENCODE";
+    public static final String EXP = "EXP";
+    public static final String FIELD = "FIELD";
+    public static final String FIND_IN_SET = "FIND_IN_SET";
+    public static final String FLOOR = "FLOOR";
+    public static final String FORMAT = "FORMAT";
+    public static final String FROM_DAYS = "FROM_DAYS";
+    public static final String FROM_UNIXTIME = "FROM_UNIXTIME";
+    public static final String GET_FORMAT = "GET_FORMAT";
+    public static final String GET_LOCT = "GET_LOCT";
+    public static final String HEX = "HEX";
+    public static final String HOUR = "HOUR";
+    public static final String INET_ATON = "INET_ATON";
+    public static final String INET_NTOA = "INET_NTOA";
+    public static final String INSERT = "INSERT";
+    public static final String INSTR = "INSTR";
+    public static final String IS_FREE_LOCK = "IS_FREE_LOCK";
+    public static final String LAST_INSERT_ID = "LAST_INSERT_ID";
+    public static final String LEFT = "LEFT";
+    public static final String LENGTH = "LENGTH";
+    public static final String LOCALTIME = "LOCALTIME";
+    public static final String LOCALTIMESTAMP = "LOCALTIMESTAMP";
+    public static final String LOG = "LOG";
+    public static final String LOG10 = "LOG10";
+    public static final String LOWER = "LOWER";
+    public static final String LPAD = "LPAD";
+    public static final String LTRIM = "LTRIM";
+    public static final String MAX = "MAX";
+    public static final String MD5 = "MD5";
+    public static final String MIN = "MIN";
+    public static final String MINUTE = "MINUTE";
+    public static final String MOD = "MOD";
+    public static final String MONTH = "MONTH";
+    public static final String MONTHNAME = "MONTHNAME";
+    public static final String NOW = "NOW";
+    public static final String OCT = "OCT";
+    public static final String PASSWORD = "PASSWORD";
+    public static final String PI = "PI";
+    public static final String POW = "POW";
+    public static final String POWER = "POWER";
+    public static final String QUARTER = "QUARTER";
+    public static final String RADIANS = "RADIANS";
+    public static final String RAND = "RAND";
+    public static final String RELEASE_LOCK = "RELEASE_LOCK";
+    public static final String REPEAT = "REPEAT";
+    public static final String REPLACE = "REPLACE";
+    public static final String REVERSE = "REVERSE";
+    public static final String RIGHT = "RIGHT";
+    public static final String ROUND = "ROUND";
+    public static final String RPAD = "RPAD";
+    public static final String RTRIM = "RTRIM";
+    public static final String SCHEMA = "SCHEMA";
+    public static final String SECOND = "SECOND";
+    public static final String SEC_TO_TIME = "SEC_TO_TIME";
+    public static final String SIGN = "SIGN";
+    public static final String SIN = "SIN";
+    public static final String SPACE = "SPACE";
+    public static final String SQRT = "SQRT";
+    public static final String STRCMP = "STRCMP";
+    public static final String SUBDATE = "SUBDATE";
+    public static final String SUBSTRING = "SUBSTRING";
+    public static final String SUBTIME = "SUBTIME";
+    public static final String SUM = "SUM";
+    public static final String SYSDATE = "SYSDATE";
+    public static final String TAN = "TAN";
+    public static final String TIME_FORMAT = "TIME_FORMAT";
+    public static final String TIME_TO_SEC = "TIME_TO_SEC";
+    public static final String TO_DAYS = "TO_DAYS";
+    public static final String TRIM = "TRIM";
+    public static final String TRUNCATE = "TRUNCATE";
+    public static final String UNIX_TIMESTAMP = "UNIX_TIMESTAMP";
+    public static final String UPPER = "UPPER";
+    public static final String USER = "USER";
+    public static final String UTC_DATE = "UTC_DATE";
+    public static final String UTC_TIME = "UTC_TIME";
+    public static final String VERSION = "VERSION";
+    public static final String WEEK = "WEEK";
+    public static final String WEEKDAY = "WEEKDAY";
+    public static final String WEEKOFYEAR = "WEEKOFYEAR";
+    public static final String YEAR = "YEAR";
+
+    private FuncName() {
+    }
+
+}
\ No newline at end of file
diff --git a/mybatis-flex-core/src/main/java/com/mybatisflex/core/constant/SqlConsts.java b/mybatis-flex-core/src/main/java/com/mybatisflex/core/constant/SqlConsts.java
index 4c5c0bc1..ad3a7f83 100644
--- a/mybatis-flex-core/src/main/java/com/mybatisflex/core/constant/SqlConsts.java
+++ b/mybatis-flex-core/src/main/java/com/mybatisflex/core/constant/SqlConsts.java
@@ -113,7 +113,6 @@ public final class SqlConsts {
     public static final String GE = " >= ";
     public static final String LT = " < ";
     public static final String LE = " <= ";
-    public static final String NOT = " NOT ";
     public static final String LIKE = " LIKE ";
     public static final String EQUALS = " = ";
     public static final String NOT_EQUALS = " != ";
@@ -123,8 +122,6 @@ public final class SqlConsts {
     public static final String NOT_IN = " NOT IN ";
     public static final String BETWEEN = " BETWEEN ";
     public static final String NOT_BETWEEN = " NOT BETWEEN ";
-    public static final String EXISTS = " EXISTS ";
-    public static final String NOT_EXISTS = " NOT EXISTS ";
 
 
     // === 排序相关关键字 ===
@@ -135,19 +132,6 @@ public final class SqlConsts {
     public static final String NULLS_LAST = " NULLS LAST";
 
 
-    // === SQL 函数名 ===
-
-    public static final String SUM = "SUM";
-    public static final String MAX = "MAX";
-    public static final String MIN = "MIN";
-    public static final String AVG = "AVG";
-    public static final String DAY = "DAY";
-    public static final String YEAR = "YEAR";
-    public static final String MONTH = "MONTH";
-    public static final String COUNT = "COUNT";
-    public static final String CONVERT = "CONVERT";
-
-
     // === 数学运算符 ===
 
     public static final String PLUS_SIGN = " + ";