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MySQL FORMAT函数使用详解
2、 将数据设置为保留两位小数,格式标记为2d,所示。 3、 将数据保留四位小数,格式中写明为4,所示,说明步骤1中的d无实际作用,可省略不写。 4、 数据按1r4rrr格式化后,结果显示为一位小数,具体所示。 5、 当格式位设置为r4rrr时,结果显示无小数,说明 ...
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