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mysql PI()函数获取圆周率的值

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2016-06-01 09:56:532494browse

PI()

返回 ϖ (pi)的值。默认的显示小数位数是7位,然而 MySQL内部会使用完全双精度值。

<code class="language-sql">mysql> SELECT PI();
        -> 3.141593

mysql> SELECT PI()+0.000000000000000000;
        -> 3.141592653589793116</code>

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