database aggregation
2017-01-05 19:00:06 0 举报
数据库聚合是一种数据处理技术,它通过将多个数据记录组合成一个单一的结果来简化和优化查询。这种技术通常用于大型数据集,以提高查询性能、减少网络传输量和提高数据的可读性。数据库聚合可以通过不同的函数实现,如求和、计数、平均值、最大值、最小值等。常见的聚合操作包括GROUP BY、HAVING、ORDER BY等。数据库聚合在各种应用场景中都有广泛应用,如报表生成、数据分析、数据挖掘等。
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大纲/内容
Acc1 April 1 April 2Acc2 May 1 May 2Acc3 May2 May4Acc1 ....
Fee Waiver QTR
portfolio dbo
...
....
PAS 50 blended PAS 200 blendedPAS 50 in all Fid...
model
model dbo
Fee Waiver
Acc1 {April 1 April 2}Acc2 {May 1 May 2}Acc3 {May2 May4}
fee waiver qtr(tmp)
Account NO is unique
Acc1 LMSAcc2 LMSAcc3 STGAcc2 LMS
....other rule
Rule Layer
rule model(tmp)
table union/ join/filter
Acc1 {April 1 April 2}Acc2 ...
Acc1 {LMS}Acc2 ...
account model rln
Acc1 {......}Acc2 {......}Acc3 {......}Acc4 {......}
All result in one
Account is unique
table Join/filter
Rule Level Aggregate and Combine Json
Rule Level Aggregate and Change format to- Json
April 1 April 30April 2 April 30May 10 May 31May 16 May 31
business calendar
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