摘要:
1. 字符串转换成int cast(str_a as signed) int 转换成字符串 concat(c4,'') 2.字符串转换成小数 convert(str_a, decimal(15,1)) 3.中位数计算方法: select "中位数" name, max(case when ID=(( 阅读全文
posted @ 2019-10-26 23:24
Suckseedeva
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