Update ch03: 复杂一点的查询.md
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@@ -1411,7 +1411,7 @@ SELECT name,
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## 3.5 判断题
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运算或者函数中含有 NULL 时,运算结果是否必然会变为NULL ?
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运算中含有 NULL 时,运算结果是否必然会变为NULL ?
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## 3.6
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