新增常量

src/main/java/com/lq/code/util/sql/SqlConstant.java

@@ -7,10 +7,26 @@ package com.lq.code.util.sql;
  */
 public class SqlConstant {
 
+    /**
+     *  SQL 切割符
+     */
     public static final String SQL_SYMBOL = "_";
-
+    /**
+     *  数据库类型常量：mysql
+     */
     public static final String DB_TYPE_MYSQL = "mysql";
-
+    /**
+     * 数据库类型常量：oracle
+     */
     public static final String DB_TYPE_ORACLE = "oracle";
 
+    /**
+     * 常用SQL 关键字:FROM
+     */
+    public static final String FROM_SQL = "FROM ";
+    /**
+     * 常用SQL 关键字:order
+     */
+    public static final String ORDER_SQL="ORDER";
+
 }