to_char(to_date(:x, 'hh24:mi') + INTERVAL :y MINUTE,'hh24:mi')
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例如:
SQL> WITH my_data AS (
2 SELECT '12:15' t FROM dual
3 UNION ALL SELECT '10:30' FROM dual
4 )
5 SELECT t,
6 to_char(to_date(t, 'hh24:mi') + INTERVAL '15' MINUTE,'hh24:mi')"t+15"
7 FROM my_data;
T t+15
----- -----
12:15 12:30
10:30 10:45
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