SQLite How to fetch every column after the 5th - sql

Question

Lets say i have the following sql table named urls:
url
redirect
revenue
realRevenue
clicksGermany
clicksUSA
clicksIndia
gaxktgq
google.com
0.321
69.51
15
28
33
oqjkgf1
example.cn
0.252
1424.3
1202
10
69
gaxktgq
corn.shop
1.242
42525.2
325525
1230
420
Now i want to fetch every column after realRevenue.
In this example you could just fetch by using the names of the columns that come after realRevenue but in my case there are way more fields that come after.
What query do i need?

Answer 1

If the fields you have correspond to the ones presented in your sample input, you should directly select those who are needed by you. If they're more than what we see here, check the next part.
As long as SQLite does not support dynamic queries, you can't create a query in an automatical way.
Although you can retrieve your table interesting fields by accessing the two tables "sqlite_master" and "pragma_table_info", that contains information regarding your table name and table fields respectively. By filtering on the table name and on the field id, you can have a list of all your fields.
SELECT p.name AS column_name
FROM sqlite_master AS m
JOIN pragma_table_info(m.name) AS p ON m.name = 'tab' AND p.cid >= 4
Output:
column_name
clicksGermany
clicksUSA
clicksIndia
But you can also have them prepared to be hardcoded into a SELECT statement, applying a GROUP_CONCAT on the concatenation of the table name and each table field.
SELECT GROUP_CONCAT(m.name || '.' || p.name, ', ') AS fields
FROM sqlite_master AS m
JOIN pragma_table_info(m.name) AS p ON m.name = 'tab' AND p.cid >= 4
fields
tab.clicksGermany, tab.clicksUSA, tab.clicksIndia
Check the demo here.
Note: This solution gets useful if your amount of fields is very big, such that writing all of them by hand becomes a time-consuming task.