Query a list of CITY names from STATION for cities that have an even ID number. Print the results in any order, but exclude duplicates from the answer.
Question
Query a list of CITY names from STATION for cities that have an even ID number.
Print the results in any order, but exclude duplicates from the answer.
Solution
This question seems to be asking for a SQL query. Here's how you can do it:
SELECT DISTINCT CITY
FROM STATION
WHERE MOD(ID, 2) = 0
Here's the step by step explanation:
-
SELECT DISTINCT CITY
: This part of the query will select all unique city names from the table. TheDISTINCT
keyword ensures that there are no duplicate city names in the result. -
FROM STATION
: This part of the query specifies the table we are selecting data from, which in this case is theSTATION
table. -
WHERE MOD(ID, 2) = 0
: This is the condition for selecting the data. TheMOD(ID, 2)
function returns the remainder of the ID divided by 2. If the ID is an even number, the remainder will be 0, so this condition will select all cities with an even ID number.
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