<=

运算符说明

<= 运算符用于比较运算。当 <= 左边运算数值小于或等于 <= 右侧运算数值时，<= 运算符返回结果为 true。

语法结构

> SELECT x <= y;

示例

mysql> SELECT 2 <= 2;
+--------+
| 2 <= 2 |
+--------+
| true   |
+--------+
1 row in set (0.00 sec)

create table t1 (spID smallint,userID bigint,score int);
insert into t1 values (1,1,1);
insert into t1 values (2,2,2);
insert into t1 values (2,1,4);
insert into t1 values (3,3,3);
insert into t1 values (1,1,5);
insert into t1 values (4,6,10);
insert into t1 values (5,11,99);

mysql> select userID,score,spID from t1 where userID<=score/spID;
+--------+-------+------+
| userid | score | spid |
+--------+-------+------+
|      1 |     1 |    1 |
|      1 |     4 |    2 |
|      1 |     5 |    1 |
|     11 |    99 |    5 |
+--------+-------+------+
4 rows in set (0.00 sec)