是否有更简洁的语法来检查多列是否不为空？我想简化
weight IS NOT NULL AND
weight_unit IS NOT NULL AND
length IS NOT NULL AND
width IS NOT NULL AND
height IS NOT NULL AND
dimensional_unit IS NOT NULL
变成更短的东西。
使用 Oracle(如果相关)。
最佳答案
与 De Morgan's law :
NOT (A OR B) = (NOT A) AND (NOT B)
你节省了 20 个字符；)
NOT (
weight IS NULL OR
weight_unit IS NULL OR
length IS NULL OR
width IS NULL OR
height IS NULL OR
dimensional_unit IS NULL
)
关于sql - Oracle SQL 语法 - 检查多个列是否为 IS NOT NULL，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/8596004/