IF ELSE查询MYSQL

Question

如何打印以下结构

＆＃13;

＆＃13;

+--------+------------+
| Male   | Female     |
+--------+------------+
| Salman |   Meena    |
| Govinda|   Kanika   |
+--------+------------+

＆＃13;

＆＃13;

＆＃13;

表员工的详细信息

employeename    sex
---------------------
Salman          male
Meena           female
Kanika          female
Govinda         male

我正在使用下面的查询，但输出不符合我的预期。

查询：

select
    (if(emp1.sex='male',emp1.employeename,'')) as Male,
    (if(emp1.sex='female',emp1.employeename,'')) as Female
from employee emp1;

＆＃13;

＆＃13;

actual output: 

+--------+------------+
| Male   | Female     |
+--------+------------+
| Salman |   	      |
|        |   Meena    |
|        |   Kanika   |
| Govinda|            |
+--------+------------+

＆＃13;

＆＃13;

＆＃13;