oracle中如果值爲空null則取默認值0，nvl函數

原創 reachHigher 2020-06-26 10:19
在oracle中如果某個字段有空值，在和其他字段相加的時候會使得結果也爲空，這個時候需要令null默認變爲0(或其他指定的數值
select nvl(S_PLEDGE_SHARES,0) + nvl(S_FRO_SHARES,0) from AEquFroPleInfoRepperend where price_date=20190930   and   s_info_windcode='300065.SZ'
  • nvl 函數的第一個參數爲字段名稱，第二個參數爲默認值
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