diff --git a/src/main/java/egovframework/config/DataSourceProxyConfig.java b/src/main/java/egovframework/config/DataSourceProxyConfig.java
index 5ee6fc7..9ea5c52 100644
--- a/src/main/java/egovframework/config/DataSourceProxyConfig.java
+++ b/src/main/java/egovframework/config/DataSourceProxyConfig.java
@@ -433,6 +433,7 @@ public class DataSourceProxyConfig {
         /**
          * INSERT 구문을 AST 기반으로 포맷팅합니다.
          * 컬럼 목록과 값 목록을 줄바꿈하여 가독성을 높입니다.
+         * INSERT ... SELECT 구문도 지원합니다.
          */
         private String formatInsertStatement(Insert insert) {
             StringBuilder sb = new StringBuilder();
@@ -453,8 +454,10 @@ public class DataSourceProxyConfig {
             // 값 목록 포맷팅
             if (insert.getItemsList() != null) {
                 if (insert.getItemsList() instanceof SubSelect) {
+                    // INSERT ... SELECT 구문인 경우
                     sb.append("\n");
-                    formatSelectBody(((SubSelect) insert.getItemsList()).getSelectBody(), sb, 0);
+                    SubSelect subSelect = (SubSelect) insert.getItemsList();
+                    formatSelectBody(subSelect.getSelectBody(), sb, 0);
                 } else {
                     sb.append("\nVALUES\n(");
                     if (insert.getItemsList() instanceof ExpressionList) {
@@ -540,8 +543,21 @@ public class DataSourceProxyConfig {
                 }
 
                 // ORDER BY 절
-                if (plainSelect.getOrderByElements() != null) {
-                    sb.append("\n").append(indent).append("ORDER BY ").append(plainSelect.getOrderByElements().toString());
+                if (plainSelect.getOrderByElements() != null && !plainSelect.getOrderByElements().isEmpty()) {
+                    sb.append("\n").append(indent).append("ORDER BY ");
+                    List<OrderByElement> orderByElements = plainSelect.getOrderByElements();
+                    for (int i = 0; i < orderByElements.size(); i++) {
+                        if (i > 0) {
+                            sb.append(", ");
+                        }
+                        OrderByElement element = orderByElements.get(i);
+                        sb.append(element.getExpression().toString());
+                        if (element.isAsc()) {
+                            sb.append(" ASC");
+                        } else if (!element.isAsc() && element.toString().contains("DESC")) {
+                            sb.append(" DESC");
+                        }
+                    }
                 }
 
                 // LIMIT 절