列出全名，工资和添加从新工资中减去旧工资的列。标签列增加？

Question

列出全名，工资并添加从新工资中扣除旧工资的栏目。标记列增加？

Answer 1

你应该知道选择......来自

select fullname, salary, salary - old_salary  as increase 
from my_table 

Answer 2

语法大致如下。您必须将列标题放在Name，Salary，New Salary和Old Salary的位置。然后将您的表名替换为＆＃34;您的表。＆＃34;

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Answer 3

select name,salary (newsalary-oldsalary) AS 'increase' from 'tablename';