diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/kt/KtAbstractWrapper.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/kt/KtAbstractWrapper.java
index b3b6c45..8108791 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/kt/KtAbstractWrapper.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/kt/KtAbstractWrapper.java
@@ -313,7 +313,7 @@ public abstract class KtAbstractWrapper<T, Children extends KtAbstractWrapper<T,
     @Override
     public Children last(boolean condition, String lastSql) {
         if (condition) {
-            this.lastSql.setStringValue(StringPool.SPACE + lastSql);
+            this.lastSql.setStringValue(this.lastSql.getStringValue() + StringPool.SPACE + lastSql);
         }
         return typedThis;
     }
@@ -329,11 +329,18 @@ public abstract class KtAbstractWrapper<T, Children extends KtAbstractWrapper<T,
     @Override
     public Children first(boolean condition, String firstSql) {
         if (condition) {
-            this.sqlFirst.setStringValue(firstSql);
+            this.sqlFirst.setStringValue(firstSql + StringPool.SPACE + this.sqlFirst.getStringValue());
         }
         return typedThis;
     }
 
+    @Override
+    public Children around(boolean condition, String firstSql, String lastSql) {
+        this.first(condition, firstSql);
+        this.last(condition, lastSql);
+        return typedThis;
+    }
+
     @Override
     public Children exists(boolean condition, String existsSql, Object... values) {
         return maybeDo(condition, () -> appendSqlSegments(EXISTS,
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/JoinAbstractWrapper.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/JoinAbstractWrapper.java
index e0f34de..23f0ac2 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/JoinAbstractWrapper.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/JoinAbstractWrapper.java
@@ -333,7 +333,7 @@ public abstract class JoinAbstractWrapper<T, Children extends JoinAbstractWrappe
     @Override
     public Children last(boolean condition, String lastSql) {
         if (condition) {
-            this.lastSql.setStringValue(StringPool.SPACE + lastSql);
+            this.lastSql.setStringValue(this.lastSql.getStringValue() + StringPool.SPACE + lastSql);
         }
         return typedThis;
     }
@@ -349,11 +349,18 @@ public abstract class JoinAbstractWrapper<T, Children extends JoinAbstractWrappe
     @Override
     public Children first(boolean condition, String firstSql) {
         if (condition) {
-            this.sqlFirst.setStringValue(firstSql);
+            this.sqlFirst.setStringValue(firstSql + StringPool.SPACE + this.sqlFirst.getStringValue());
         }
         return typedThis;
     }
 
+    @Override
+    public Children around(boolean condition, String firstSql, String lastSql) {
+        this.first(condition, firstSql);
+        this.last(condition, lastSql);
+        return typedThis;
+    }
+
     @Override
     public Children exists(boolean condition, String existsSql, Object... values) {
         return maybeDo(condition, () -> appendSqlSegments(EXISTS,
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/MPJLambdaWrapper.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/MPJLambdaWrapper.java
index c043b1e..adcd716 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/MPJLambdaWrapper.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/MPJLambdaWrapper.java
@@ -197,6 +197,18 @@ public class MPJLambdaWrapper<T> extends JoinAbstractLambdaWrapper<T, MPJLambdaW
         return Query.super.selectAll(clazz);
     }
 
+    /**
+     * 查询主表全部字段
+     * <p>
+     * 需要使用 使用 JoinWrappers.lambda(clazz) 或者 new MPJLambdaQueryWrapper&lt;&lt;(clazz) 构造
+     *
+     * @return children
+     */
+    public MPJLambdaWrapper<T> selectAll() {
+        Assert.notNull(getEntityClass(), "使用 JoinWrappers.lambda(clazz) 或者 new MPJLambdaQueryWrapper<>(clazz)");
+        return selectAll(getEntityClass());
+    }
+
     /**
      * 子查询
      */
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/interfaces/Join.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/interfaces/Join.java
index b77bbe0..3ee3a88 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/interfaces/Join.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/interfaces/Join.java
@@ -97,6 +97,24 @@ public interface Join<Children> extends Serializable {
      */
     Children first(boolean condition, String firstSql);
 
+    /**
+     * ignore
+     */
+    default Children around(String firstSql, String lastSql) {
+        return around(true, firstSql, lastSql);
+    }
+
+    /**
+     * sql 起始句 和介绍语句（会拼接在SQL语句的起始处和结束处）
+     *
+     * @param condition 执行条件
+     * @param firstSql  起始语句
+     * @param lastSql   结束语句
+     * @return children
+     * @since 1.4.11
+     */
+    Children around(boolean condition, String firstSql, String lastSql);
+
     /**
      * ignore
      */