数据库系统原理与实践——修复第四次作业中的错误
之前的代码的含义变成了“在2011、2019年等有交易记录”这个应该是错误的意思了,现在改正了。
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				@ -230,32 +230,35 @@ where not not exists(select * from account where PRODUCT_CD = 'CS' and account.C
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其他年无交易记录,不要,要
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        \end{csv}
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        \begin{minted}{SQL}
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select ACCOUNT_ID
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select account.ACCOUNT_ID
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from account
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            left join (select *
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         left join (select ACCOUNT_ID
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                    from acc_transaction
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                    where year(TXN_DATE) != 2013) as not2013 using (ACCOUNT_ID)
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where TXN_DATE is not null;
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                    where year(TXN_DATE) = 2013) as _2013 on account.ACCOUNT_ID = _2013.ACCOUNT_ID
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where _2013.ACCOUNT_ID is null
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order by account.ACCOUNT_ID;
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        \end{minted}
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        \begin{csv}
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        \small\begin{csv}
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,ACCOUNT_ID
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1,4
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2,5
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3,18
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4,19
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5,21
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6,28
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7,10
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8,17
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9,13
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10,29
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11,27
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12,3
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13,23
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14,12
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15,22
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16,15
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17,28            
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1,1
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2,2
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3,3
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4,5
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5,10
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6,11
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7,12
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8,13
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9,15
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10,17
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11,18
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12,19
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13,21
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14,22
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15,23
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16,27
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17,28
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18,29
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19,30
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        \end{csv}
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    }
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    \questionandanswer[]{
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