I want to grep the Employee Unique Tax ID from first Tables to second starting like:
select * from where Employee_ID as 'var1' Join on Employee_Catagory as 'var2' Join On Employee_Pos. as var3 .
To get the Employee Unique_Tax_ID as $res
I want to have it in a Sigle SQL Statement. The var1 -var3 value is not important because that can I change with PHP in that file with functions.
Simple LEFT JOIN
should do:
select t1.employee_id,
t1.employee_category,
t1.employee_pos,
t2.unique_tax_id
from table1 t1
left join table2 t2 on t1.system_id = t2.system_id
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