❶ sql server如何按季度分組統計所有的數據
和按月份組的原理是一樣的吧！
按月分組
按季度分組和按月分組的區別應該就是時間段的區別吧！
selectcasewhenmonth(date)=1ormonth(date)=2
ormonth(date)=3then'一季度'
whenmonth(date)=4ormonth(date)=5
ormonth(date)=6then'2季度'
whenmonth(date)=7ormonth(date)=8
ormonth(date)=9then'3季度'
whenmonth(date)=10ormonth(date)=11
ormonth(date)=12then'4季度'
else''end,sum(數量)
fromtable
groupby
casewhenmonth(date)=1ormonth(date)=2
ormonth(date)=3then'一季度'
whenmonth(date)=4ormonth(date)=5
ormonth(date)=6then'2季度'
whenmonth(date)=7ormonth(date)=8
ormonth(date)=9then'3季度'
whenmonth(date)=10ormonth(date)=11
ormonth(date)=12then'4季度'
else''end