oracle中如果值为空null则取默认值0，nvl函数

原創 reachHigher 2020-06-26 10:19
在oracle中如果某个字段有空值，在和其他字段相加的时候会使得结果也为空，这个时候需要令null默认变为0(或其他指定的数值
select nvl(S_PLEDGE_SHARES,0) + nvl(S_FRO_SHARES,0) from AEquFroPleInfoRepperend where price_date=20190930   and   s_info_windcode='300065.SZ'
  • nvl 函数的第一个参数为字段名称，第二个参数为默认值
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