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Conditional values
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Postgres
The SQL Standard is the
CASE statement
SELECT title, score, CASE WHEN score>8.5 THEN 'Excellent' ELSE 'OK' END FROM movie WHERE 10>id
Specific to Postgres
Any number of cases may be used.
Related links:
FUNCTIONS
Concatenate strings.
Substring: Extracting part of a string.
lower case
Finding a substring in a string
Formatting numbers to two decimal places.
Replace a NULL with a specific value
Conditional values
Get the date and time right now.
Format dates.