How can I insert column values in a particular row separately?

Question

I have a table with columns {a, b, c} and for row x I want to add a value for a, then a value for b, then a value for c all in separate activities as the user progresses through my app (for another user, values for a, b, and c would be added separately to a row y). How can I do this?

Answer 1

可以插入a，然后b和c必须是该行的更新

Answer 2

i think you need to add a primary key to your table {a,b,c,key_column}

and then you can use below..

To update a:-

UPDATE table_name
SET a=valueA
WHERE key_colum=key_value;

To update b:-

UPDATE table_name
SET b=valueB
WHERE key_colum=key_value;

To update c:-

UPDATE table_name
SET c=valueC
WHERE key_colum=key_value;