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In the context of geographical data stored in a database, we often need to retrieve specific information based on certain conditions. In this case, we are interested in the station that has the highest latitude value, but still less than a given threshold (137.2345). More specifically, we want to know the longitude of this station, rounded to four decimal places.
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The SQL query first identifies the maximum latitude that is less than 137.2345 using a subquery. It then uses this value to select the corresponding longitude from the STATION table. The ROUND function is used to round this longitude value to four decimal places.
select Round(LONG_W,4)
from STATION
where LAT_N = (Select Max(LAT_N)from STATION where LAT_N < 137.2345);
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