医案推荐书籍

src/main/resources/mapper/book/BookMedicalRecordsDao.xml

@@ -23,4 +23,12 @@
         limit #{page},#{limit}
     </select>
 
+    <select id="getCount" parameterType="int" resultType="int">
+        select count(*) from (
+            select distinct book_id from  book_medical_records bmr
+            left join book b on bmr.book_id = b.id
+            where bmr.book_id not in (select book_id from user_ebook_buy where user_id = #{userId})
+            and b.del_flag = 0 and b.state = 1) t
+    </select>
+
 </mapper>