diff --git a/src/backend/src/main/resources/mybatis/mapper/TicketMapper.xml b/src/backend/src/main/resources/mybatis/mapper/TicketMapper.xml
index 628f1e7..4204123 100644
--- a/src/backend/src/main/resources/mybatis/mapper/TicketMapper.xml
+++ b/src/backend/src/main/resources/mybatis/mapper/TicketMapper.xml
@@ -24,10 +24,10 @@
                (total_qty - sold_qty) AS "remaining",
                max_per_order AS "maxPerOrder",
                CASE WHEN status = 'active'
-                     AND (sale_start IS NULL OR sale_start <= now())
-                     AND (sale_end   IS NULL OR sale_end   >= now())
+                     AND (sale_start IS NULL OR sale_start &lt;= now())
+                     AND (sale_end   IS NULL OR sale_end   &gt;= now())
                     THEN true ELSE false END AS "onSale",
-               CASE WHEN (total_qty - sold_qty) <= 0 THEN true ELSE false END AS "soldOut",
+               CASE WHEN (total_qty - sold_qty) &lt;= 0 THEN true ELSE false END AS "soldOut",
                sort_order    AS "sortOrder"
         FROM ticket_product
         WHERE tenant_id = 'KINTEX'
@@ -48,8 +48,8 @@
                status,
                (total_qty - sold_qty) AS "remaining",
                CASE WHEN status = 'active'
-                     AND (sale_start IS NULL OR sale_start <= now())
-                     AND (sale_end   IS NULL OR sale_end   >= now())
+                     AND (sale_start IS NULL OR sale_start &lt;= now())
+                     AND (sale_end   IS NULL OR sale_end   &gt;= now())
                     THEN true ELSE false END AS "onSale"
         FROM ticket_product
         WHERE tenant_id = 'KINTEX'