Weather Observation Station 7

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    SELECT distinct(city) from station where lower(right(city,1)) IN ('a','e','i','o','u');

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    SELECT DISTINCT(CITY)
    FROM STATION 
    WHERE RIGHT(CITY,1) IN ('a','e','i','o','u')
    
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    ORACLE PL/SQL:

    SET SERVEROUTPUT ON; BEGIN FOR r IN (SELECT DISTINCT CITY FROM STATION WHERE LOWER(SUBSTR(CITY,-1,1)) IN ('a','e','i','o','u')) LOOP DBMS_OUTPUT.PUT_LINE(r.city); END LOOP; END; /

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    Solution for Oracle: SELECT DISTINCT(CITY) FROM STATION WHERE UPPER(SUBSTR(CITY,-1,1)) IN ('A','E','I','O','U');

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    SELECT DISTINCT CITY FROM STATION WHERE SUBSTR(CITY,-1) IN ('A','E','I','O','U');