diff --git a/querydsl-libraries/querydsl-sql/src/main/java/com/querydsl/sql/SQLExpressions.java b/querydsl-libraries/querydsl-sql/src/main/java/com/querydsl/sql/SQLExpressions.java
index 535b077b44..b7d0ddeae4 100644
--- a/querydsl-libraries/querydsl-sql/src/main/java/com/querydsl/sql/SQLExpressions.java
+++ b/querydsl-libraries/querydsl-sql/src/main/java/com/querydsl/sql/SQLExpressions.java
@@ -18,6 +18,7 @@
 import com.querydsl.core.types.Expression;
 import com.querydsl.core.types.Operator;
 import com.querydsl.core.types.Ops;
+import com.querydsl.core.types.OrderSpecifier;
 import com.querydsl.core.types.Path;
 import com.querydsl.core.types.SubQueryExpression;
 import com.querydsl.core.types.dsl.BooleanExpression;
@@ -700,6 +701,20 @@ public static WithinGroup<String> listagg(Expression<?> expr, String delimiter)
     return new WithinGroup<>(String.class, SQLOps.LISTAGG, expr, ConstantImpl.create(delimiter));
   }
 
+  /**
+   * PostgreSQL specific string_agg aggregate function.
+   *
+   * <p>Use {@link WithinGroup#withinGroup()} followed by {@link WithinGroup.OrderBy#orderBy(OrderSpecifier...)}
+   * to specify the ORDER BY clause.</p>
+   *
+   * @param expr expression to be aggregated
+   * @param delimiter delimiter string
+   * @return string_agg(expr, delimiter)
+   */
+  public static WithinGroup<String> stringAgg(Expression<?> expr, String delimiter) {
+    return new WithinGroup<>(String.class, SQLOps.GROUP_CONCAT2, expr, ConstantImpl.create(delimiter));
+  }
+
   /**
    * NTH_VALUE returns the expr value of the nth row in the window defined by the analytic clause.
    * The returned value has the data type of the expr.
diff --git a/querydsl-libraries/querydsl-sql/src/test/java/com/querydsl/sql/WithinGroupTest.java b/querydsl-libraries/querydsl-sql/src/test/java/com/querydsl/sql/WithinGroupTest.java
index 5dad0d8d75..345b9b4daa 100644
--- a/querydsl-libraries/querydsl-sql/src/test/java/com/querydsl/sql/WithinGroupTest.java
+++ b/querydsl-libraries/querydsl-sql/src/test/java/com/querydsl/sql/WithinGroupTest.java
@@ -80,4 +80,14 @@ public void listaggCommaWithSpace() {
   public void listaggIntString() {
     assertThat(toString(SQLExpressions.listagg(path, "1"))).isEqualTo("listagg(path,'1')");
   }
+
+  @Test
+  public void stringAgg_with_orderBy() {
+    var expr =
+        SQLExpressions.stringAgg(path, ", ")
+            .withinGroup()
+            .orderBy(path2.asc())
+            .getValue();
+    assertThat(toString(expr)).isEqualTo("string_agg(path,', ') within group (order by path2 asc)");
+  }
 }