修改SQL错误

applications/school/school-server/src/main/resources/mapper/ScoreMapper.xml

@@ -560,20 +560,20 @@
         <if test="item.sd_stuNumber != null">
           sd_stuNumber = #{item.sd_stuNumber,jdbcType=VARCHAR},
         </if>
-        <if test="sd_total != null" >
-          sd_total = #{sd_total,jdbcType=INTEGER}
+        <if test="item.sd_total != null" >
+          sd_total = #{item.sd_total,jdbcType=INTEGER},
         </if>
-        <if test="sd_class_rank != null" >
-          sd_class_rank = #{sd_class_rank,jdbcType=INTEGER},
+        <if test="item.sd_class_rank != null" >
+          sd_class_rank = #{item.sd_class_rank,jdbcType=INTEGER},
         </if>
-        <if test="sd_grade_rank != null" >
-          sd_grade_rank = #{sd_grade_rank,jdbcType=INTEGER},
+        <if test="item.sd_grade_rank != null" >
+          sd_grade_rank = #{item.sd_grade_rank,jdbcType=INTEGER},
         </if>
-        <if test="sd_class_average != null" >
-          sd_class_average = #{sd_class_average,jdbcType=DOUBLE},
+        <if test="item.sd_class_average != null" >
+          sd_class_average = #{item.sd_class_average,jdbcType=DOUBLE},
         </if>
-        <if test="sd_grade_average != null" >
-          sd_grade_average = #{sd_grade_average,jdbcType=DOUBLE},
+        <if test="item.sd_grade_average != null" >
+          sd_grade_average = #{item.sd_grade_average,jdbcType=DOUBLE},
         </if>
       </set>
       WHERE sd_id= #{item.sd_id,jdbcType=BIGINT}