From 8b5ae4f644b951f7ab62c9037c8ac445b0b680a0 Mon Sep 17 00:00:00 2001
From: huminmin <mac@MacBook-Pro.local>
Date: 星期五, 13 二月 2026 11:12:57 +0800
Subject: [PATCH] 指标统计近12个月的销售趋势分析

---
 src/main/resources/mapper/sales/SalesLedgerProductMapper.xml |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/main/resources/mapper/sales/SalesLedgerProductMapper.xml b/src/main/resources/mapper/sales/SalesLedgerProductMapper.xml
index 4adf09e..671fcf5 100644
--- a/src/main/resources/mapper/sales/SalesLedgerProductMapper.xml
+++ b/src/main/resources/mapper/sales/SalesLedgerProductMapper.xml
@@ -196,11 +196,15 @@
     </select>
 
     <select id="selectProductCountByTypeAndDate" resultType="int">
-        SELECT COUNT(*)
+        SELECT IFNULL(COUNT(*), 0)
         FROM sales_ledger_product
         WHERE type = #{type}
-        AND register_date &gt;= #{startDate}
-        AND register_date &lt;= #{endDate}
+        <if test="startDate != null">
+            AND register_date &gt;= #{startDate}
+        </if>
+        <if test="endDate != null">
+            AND register_date &lt;= #{endDate}
+        </if>
     </select>
 
     <select id="selectRawMaterialExpense" resultType="java.math.BigDecimal">

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