db2的rollup和cube函数
rollup的效果就是对group by后面的一个分组列名进行统计。 bankid为第一列 SELECT CASE WHEN grouping (branchid) = 0 THEN branchid ELSE 小计 END as branchid, CASE WHEN grouping (bankid) = 0 THEN bankid ELSE 总计 END as bankid, SUM (balance)FROM
rollup的效果就是对group by后面的一个分组列名进行统计。
bankid为第一列
SELECT CASE WHEN grouping (branchid) = 0 THEN branchid ELSE '小计' END as branchid, CASE WHEN grouping (bankid) = 0 THEN bankid ELSE '总计' END as bankid, SUM (balance) FROM ebanksumm WHERE workdate = '20140320' GROUP BY bankid , branchid with rollup
branchid为第一列
SELECT CASE WHEN grouping (branchid) = 0 THEN branchid ELSE '小计' END AS branchid , CASE WHEN grouping (bankid) = 0 THEN bankid ELSE '总计' END AS bankid , SUM (balance) FROM ebanksumm WHERE workdate = '20140321' GROUP BY branchid , bankid WITH rollup
cube函数则是对groupby后面的所有列依次进行统计。和rollup的区别就在于要统计的列。rollup只统计一列,cube统计所有列
SELECT CASE WHEN grouping (branchid) = 0 THEN branchid ELSE '小计' END as branchid, CASE WHEN grouping (bankid) = 0 THEN bankid ELSE '总计' END as bankid, SUM (balance) FROM ebanksumm WHERE workdate = '20140321' GROUP BY bankid , branchid with Cube

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