1 題目描述

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2 解題思路

SELECT id,sum(if(month='Jan',revenue,null)) as Jan_Revenue,sum(if(month='Feb',revenue,null)) as Feb_Revenue,sum(if(month='Mar',revenue,null)) as Mar_Revenue,sum(if(month='Apr',revenue,null)) as Apr_Revenue,sum(if(month='May',revenue,null)) as May_Revenue,sum(if(month='Jun',revenue,null)) as Jun_Revenue,sum(if(month='Jul',revenue,null)) as Jul_Revenue,sum(if(month='Aug',revenue,null)) as Aug_Revenue,sum(if(month='Sep',revenue,null)) as Sep_Revenue,sum(if(month='Oct',revenue,null)) as Oct_Revenue,sum(if(month='Nov',revenue,null)) as Nov_Revenue,sum(if(month='Dec',revenue,null)) as Dec_Revenue FROM department GROUP BY id

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