MySQL-运算符

1.运算符

1.1算术运算符

select 1+1 sum;
select 2-1;
select 5/2;#2.5
select 5 div 2;#取整
select 3/0;#null
select 5%2;#1

1.2比较运算符

select 1>2;#0
select 1<2;#1
select 1!=2;
select 1<>2;#不等于	结果1

1.3逻辑运算符

select  1>2 and 2>1;#0
select 1>2 or 2>1;#1
select !(1>2);#1

1.4位运算符

select 2&3;#与
select 2|3;#或
select 2^3;#异或