The problem context involves a database table named 'STATION' which contains a field 'LAT_N' representing latitude values. The task is to find the maximum latitude value that is less than a given threshold (137.2345 in this case), and return this value rounded to four decimal places.
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The SQL query uses the 'max' function to find the maximum latitude value from the 'LAT_N' field where the latitude is less than 137.2345. The 'Round' function is then used to round this maximum value to four decimal places. The 'where' clause is used to filter the records to only those where the latitude is less than 137.2345.
select Round(max(LAT_N),4)
from STATION
where LAT_N < 137.2345;
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