I have a character field named employee's id. In which we enter the employee id's like 102,103,1021,..,because it is a character field it shows like 102,1021,103,.. But i want to display like 102,103,1021,... How can i sort the charcter field.?
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Представления
The below SQL to Sort character field as int,
select * from table_name order by cast(employees_id as int) asc
But in python the same code _order = "cast(employees_id as int) asc" is not support.
Solution to override _generate_order_by method in python,
def _generate_order_by(self, order_spec, query):
my_order = "cast(employees_id as int) asc"
if order_spec:
return super(class_name, self)._generate_order_by(order_spec, query) + ", " + my_order
return " order by " + my_order
Refer the link for more details.
Can we update it in xml code?
yes but what about the senario when i have a char like
"INV/01,INV/02"
at this time SQL throw an error how can we overcome?
IN that case , check below link
https://stackoverflow.com/questions/7018628/postgresql-sorting-mixed-alphanumeric-data
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