Modifying column value according to status, and adding extra rows. (sql) - sql

Question

In my table I have a "name" column and a "status" column.
the status is either true or false.
And another table contains a number which is a total amount.
The result that I want to get is a table with two columns:
name | status
and and example of a data:
a | available
a | available
a | not available
a | not available
a | available
when "a" is in the name column and the availability is the status column.
The total amount from the second table indicates the total number of "a" rows that i need to have, and the status depends on the true/false from the status column in the original table.
If the status is "true" I need to write "available" and when "false" then "not available".
If the total amount value is bigger than the data I have in the first table, I need to add rows according to the total amount with the status "available".
For example, If I have 3 records of "a", when one has the status "true" and the other two have the status "false", and the total amount is 4, In the result I need to get 4 rows with the name "a", 2 of them "available" and 2 "not available" (the given 3 rows, plus one row to make it 4).
My question is, how can I change the value according to the data in the table? (Write available/ not available)
And how can I add a certain amount of rows with preset values (same name as before, and "available" status)?

Answer 1

"...how can I change the value according to the data in the table?"
You can use CASE() to test for the value of the column.
SELECT name,
CASE WHEN status = 'true'
THEN 'available'
ELSE 'not available'
END status
FROM tableName

Answer 2

For future answer-seekers:
To get the 'fake' rows, one way is to use are recursive CTE:
WITH Expanded_Data as (SELECT Counted_Data.name,
CAST('true' as VARCHAR(5)) as status,
Counted_Data.count + 1 as count,
Total.count as limit
FROM (SELECT name, COUNT(*) as count
FROM Data
GROUP BY name) Counted_Data
JOIN Total
ON Counted_Data.name = Total.name
AND Counted_Data.count < Total.count
UNION ALL
SELECT name, status, count + 1, limit
FROM Expanded_Data
WHERE count < limit)
SELECT name, CASE WHEN status = 'true'
THEN 'available'
ELSE 'not available' END
FROM (SELECT name, status
FROM Data
UNION ALL
SELECT name, status
FROM Expanded_Data) d;
(have a working SQL Fiddle example.)
I'm a little worried about the initial duplication in the source data though; I can only hope there is more 'unique' information as well.