Why I get error Invalid number ORA-01722: - sql

Question

I am a little bit confusing and have no idea how to solve this problem. I have column in table Quantity which store Time value.
I want to create a following story. If I have for example
Quantity
8:00
8:00
It needs to SUM() this two and in output I need to get 16 HOURS
Second think, it needs to take last two number :00 and add to HOURS.
This is what I do so far
SELECT
(SUM(SUBSTR(A.Quantity, ':', 1)) + TRUNC((SUM(SUBSTR(A.Quantity, ':', -1)) / 60),0)), ':' ,
MOD(SUM(SUBSTR(A.Quantity, ':' , -1)), 60)
AS TOTAL_SUM FROM (
SELECT
ata.ATAID AS AtaId, ata.ProjectID, ata.StartDate, ataAW.Quantity
FROM
ata
INNER JOIN
weekly_report
ON
weekly_report.ataId = ata.ATAID
INNER JOIN
ata_articles ataAW
ON
ataAW.wrId = weekly_report.id
WHERE
ata.ATAID = 10987
AND
ataAW.type = 1
OR
ataAW.type = 2
OR
ataAW.type = 3
AND
(weekly_report.status != 3 AND weekly_report.status != 4)
AND
(
weekly_report.year < (SELECT year FROM weekly_report WHERE id = 89)
OR
(
weekly_report.year <= (SELECT year FROM weekly_report WHERE id = 89)
AND
weekly_report.week <= (SELECT week FROM weekly_report WHERE id = 89)
)
)
) A
group by A.AtaId
So far better explanation, when I run first part of query I need to get something like
SELECT
CONCAT(
-- extract hours froAm time and add minutes converted to hours
(SUM(SUBSTRING_INDEX(aa.Quantity, ':', 1)) + TRUNCATE((SUM(SUBSTRING_INDEX(aa.Quantity, ':', -1)) / 60),0))
-- , ':',
-- extract minutes from time and find reminder (modulo)*/
-- LPAD((SUM(SUBSTRING_INDEX(aa.Quantity, ':', -1)) % 60), 2, 0)
) AS W_TOTAL_SUM
FROM
ata_articles aa
INNER JOIN
weekly_report wr
ON
aa.wrId = wr.id
WHERE
aa.wrId = 69
AND
aa.type = 1
TOTAL_SUM
16
And when I run second part
SELECT
CONCAT(
-- extract hours froAm time and add minutes converted to hours
-- (SUM(SUBSTRING_INDEX(aa.Quantity, ':', 1)) + TRUNCATE((SUM(SUBSTRING_INDEX(aa.Quantity, ':', -1)) / 60),0))
-- , ':',
-- extract minutes from time and find reminder (modulo)*/
LPAD((SUM(SUBSTRING_INDEX(aa.Quantity, ':', -1)) % 60), 2, 0)
) AS W_TOTAL_SUM
FROM
ata_articles aa
INNER JOIN
weekly_report wr
ON
aa.wrId = wr.id
WHERE
aa.wrId = 69
AND
aa.type = 1
I get output
TOTAL_SUM
00
Can someone guide me and tell me how to solve this issue since I try every solution but unfortunetlly doesn't work. And here is what I try so far, but I always get message
ORA-01722: invalid number
01722. 00000 - "invalid number"
*Cause: The specified number was invalid.
*Action: Specify a valid number
SELECT
(SUM(SUBSTR(A.Quantity, ':', 1)) + TRUNC((SUM(SUBSTR(A.Quantity, ':', -1)) / 60),0)), ':' ,
MOD(SUM(SUBSTR(A.Quantity, ':' , -1)), 60)
AS TOTAL_SUM FROM (
SELECT
ata.ATAID AS AtaId, ata.ProjectID, ata.StartDate, ataAW.Quantity
FROM
ata
INNER JOIN
weekly_report
ON
weekly_report.ataId = ata.ATAID
INNER JOIN
ata_articles ataAW
ON
ataAW.wrId = weekly_report.id
WHERE
ata.ATAID = 10987
AND
ataAW.type = 1
OR
ataAW.type = 2
OR
ataAW.type = 3
AND
(weekly_report.status != 3 AND weekly_report.status != 4)
AND
(
weekly_report.year < (SELECT year FROM weekly_report WHERE id = 89)
OR
(
weekly_report.year <= (SELECT year FROM weekly_report WHERE id = 89)
AND
weekly_report.week <= (SELECT week FROM weekly_report WHERE id = 89)
)
)
) A
group by A.AtaId
UPDATE
I get output error message
ORA-00907: missing right parenthesis
00907. 00000 - "missing right parenthesis"
*Cause:
*Action:
Error at Line: 267 Column: 19
SELECT ( EXTRACT( DAY FROM duration ) * 24 + EXTRACT( HOUR FROM duration ) )
|| ':'
|| TO_CHAR( EXTRACT( MINUTE FROM DURATION ), 'FM00' )
|| ' HOURS' AS duration
FROM (
SELECT NUMTODSINTERVAL(SUM( SUBSTR( quantity, 1, INSTR( quantity, ':' ) - 1 ) ),'HOUR')
+ NUMTODSINTERVAL(SUM( SUBSTR( quantity, INSTR( quantity, ':' ) + 1 ) ), 'MINUTE' )
AS duration
FROM (
SELECT ata.ATAID AS AtaId, ata.ProjectID, ata.StartDate, ataAW.Quantity
FROM ata
INNER JOIN weekly_report
ON weekly_report.ataId = ata.ATAID
INNER JOIN ata_articles ataAW
ON ataAW.wrId = weekly_report.id
INNER JOIN (SELECT week, year FROM weekly_report WHERE id = 89 ) b
ON ( weekly_report.year < b.year OR ( weekly_report.year = b.year AND weekly_report.week <= b.week ))
WHERE ata.ATAID = 10987
AND ataAW.type IN ( 1, 2, 3 )
AND weekly_report.status NOT IN ( 3, 4 )
))
group by A.AtaId
Here is what I get as output when I execute following code
DURATION
:HOURS

Answer 1

If you have the (slightly more complicated) sample data:
CREATE TABLE table_name ( Quantity ) AS
SELECT '8:00' FROM DUAL UNION ALL
SELECT '7:30' FROM DUAL UNION ALL
SELECT '0:30' FROM DUAL;
Then you can use string functions to get the hour and minute parts and sum those and then convert the totals to an interval (so you don't end up with 15:60 HOURS) and then format the output:
SELECT ( EXTRACT( DAY FROM duration ) * 24
+ EXTRACT( HOUR FROM duration )
)
|| ':'
|| TO_CHAR( EXTRACT( MINUTE FROM DURATION ), 'FM00' )
|| ' HOURS' AS duration
FROM (
SELECT NUMTODSINTERVAL(
SUM( SUBSTR( quantity, 1, INSTR( quantity, ':' ) - 1 ) ),
'HOUR'
)
+
NUMTODSINTERVAL(
SUM( SUBSTR( quantity, INSTR( quantity, ':' ) + 1 ) ),
'MINUTE'
) AS duration
FROM table_name
);
Which outputs:
| DURATION |
| :---------- |
| 16:00 HOURS |
db<>fiddle here