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  • 多个字段取最大值、最小值、首个非空值

    -- 多个值取最大和最小
    select least(1,2,3,0,4,5) as min,greatest(1,2,3,0,4,5) as max;
    +------+------+--+
    | min  | max  |
    +------+------+--+
    | 0    | 5    |
    +------+------+--+
    select coalesce(null,null,1,null,0) as value1,coalesce(null,0) as value2,nvl(null,0) as value3;
    +---------+---------+---------+--+
    | value1  | value2  | value3  |
    +---------+---------+---------+--+
    | 1       | 0       | 0       |
    +---------+---------+---------+--+
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  • 原文地址:https://www.cnblogs.com/chenzechao/p/9724633.html
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