diff --git a/数据库系统原理与实践/平时作业/第四次作业.tex b/数据库系统原理与实践/平时作业/第四次作业.tex
index d9baded..cfff4ce 100644
--- a/数据库系统原理与实践/平时作业/第四次作业.tex
+++ b/数据库系统原理与实践/平时作业/第四次作业.tex
@@ -230,32 +230,35 @@ where not not exists(select * from account where PRODUCT_CD = 'CS' and account.C
 其他年无交易记录,不要,要
         \end{csv}
         \begin{minted}{SQL}
-select ACCOUNT_ID
+select account.ACCOUNT_ID
 from account
-            left join (select *
+         left join (select ACCOUNT_ID
                     from acc_transaction
-                    where year(TXN_DATE) != 2013) as not2013 using (ACCOUNT_ID)
-where TXN_DATE is not null;
+                    where year(TXN_DATE) = 2013) as _2013 on account.ACCOUNT_ID = _2013.ACCOUNT_ID
+where _2013.ACCOUNT_ID is null
+order by account.ACCOUNT_ID;
         \end{minted}
-        \begin{csv}
+        \small\begin{csv}
 ,ACCOUNT_ID
-1,4
-2,5
-3,18
-4,19
-5,21
-6,28
-7,10
-8,17
-9,13
-10,29
-11,27
-12,3
-13,23
-14,12
-15,22
-16,15
-17,28            
+1,1
+2,2
+3,3
+4,5
+5,10
+6,11
+7,12
+8,13
+9,15
+10,17
+11,18
+12,19
+13,21
+14,22
+15,23
+16,27
+17,28
+18,29
+19,30
         \end{csv}
     }
     \questionandanswer[]{