nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

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liliconcom

如何避免多條件配對中缺失值為空時查詢不出結果？

當連接多個匹配條件的表時，例如兩個表按照USL、LSL、Nominal進行匹配，當只有上限或只有下限時，即缺少下限時，查找會為空值或者上限是缺失值，如何解決這個問題？缺失值全部替換成9999嗎？

謝謝！

蘋果系統

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