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Developer-C 11.1
3.0
4.0
10.2
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10.4
10.5
10.6
10.7
10.8
10.9
5.5
5.6
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8.0
18
11g Release 2
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8.4
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10
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12
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14
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16
2012
2014
2016
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3.8
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3.27
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2.11
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2.6
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Sakila
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AdventureWorks
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AdventureWorks
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SELECT city FROM ( SELECT 'xx' AS city FROM DUAL UNION SELECT 'ax' FROM DUAL UNION SELECT 'xa' FROM DUAL UNION SELECT 'aa' FROM DUAL UNION SELECT 'x' FROM DUAL UNION SELECT 'a' FROM DUAL ) station WHERE NOT REGEXP_LIKE(city, '^[^aeiou]|[^aeiou]$')
CITY
a
aa