The arithmetic operators support addition , subtraction , multiplication , and division of numeric values 算术运算符支持数值的加法、减法、乘法和除法。
It can be composed of multiple subexpressions that use the different relational operators supported in python 它可以包括多个使用python中支持的不同关系运算符的子表达式。
The apply operator supports invoking a table - valued expression a table - valued function or subquery for each row returned by an outer table reference Apply运算符支持为外部表引用返回的每个行调用表值表达式(表值函数或子查询) 。