HANA / TeraData 日期年加減1

原創 baojiangfeng 2020-05-13 06:00

有個需求是:取數據的同期值(年-1) , 並且這個sql要動態切換數據源(同時支持HANA 及 TeraData數據庫)

搜了下HANA的文檔 , 用 ADD_YEARS( <日期> , 1 )

搜了下TeraData的文檔 ,  用  <日期> + INTERVAL 1 YEAR 

但HANA不支持INTERVAL , 試試TD是否支持ADD_YEARS

繼續查TD的文檔,發現確實沒有ADD_YEARS ... 但是有ADD_MONTHS !!! 

注意我圈出來的重點,連文檔裏寫 加13年 都用 ADD_MONTHS( <日期> , 12 * 13)

結論 : 用 ADD_MONTHS(<日期>,12*1) 取同期值,可以完美同時支持 TD/HANA
 

TeraData-INTERVAL 鏈接

https://docs.teradata.com/reader/~_sY_PYVxZzTnqKq45UXkQ/m7AcE_9iy4Sg45ddDvOZvg

TeraData-ADD_MONTHS鏈接

https://docs.teradata.com/reader/kmuOwjp1zEYg98JsB8fu_A/eKLquFPM6dq5ihpOorU9Pg

HANA-ADD_YEARS鏈接

https://help.sap.com/viewer/4fe29514fd584807ac9f2a04f6754767/2.0.02/en-US/20dab50375191014bd8fe42e781bdaa0.html

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