see the example below
Select * from mydoubts_data
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|id | jobid | name | salary | age|
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|1 | 121 | vasanthan| 2000 |16 |
|2 | 122 | John | 3000 |64 |
select id,name,salary,SQRT(age) from mydoubts_data
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|id | jobid | name | salary | SQRT(age)|
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|1 | 121 | vasanthan| 2000 |4 |
|2 | 122 | John | 3000 |8 |