StackReverse Polish notation is a notation where every operator follows all of its operands. For example, an expression (1+2)*(5+4) in the conventional Polish notation can be represented as 1 2 + 5 4 + * in the Reverse Polish notation. One of advanta
在MySQL中,分页可以用limit实现SELECT * FROM person LIMIT 1,5;在limit中无法使用运算符:SELECT * FROM person LIMIT (2-1)*5,5;所以我们得先进行拼接再运行,代码如下:SET @stmt = CONCAT('select * from person limit ',(2-1)*5,',',5,'');PREPARE r ...