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On page 51 the author introduces an example of COALESCE() function. But it doesn't work. I mean, there are still NULL fields. Here is the statement:
SELECT * FROM station_data WHERE coalesce(precipitation, 0) <= 0.5;
The text was updated successfully, but these errors were encountered:
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On page 51 the author introduces an example of COALESCE() function. But it doesn't work. I mean, there are still NULL fields.
Here is the statement:
SELECT * FROM station_data
WHERE coalesce(precipitation, 0) <= 0.5;
The text was updated successfully, but these errors were encountered: