ifnull postgres
SELECT coalesce(column, 1)postgress if
-- use postgress case
SELECT name, continent, indep_year,
CASE WHEN indep_year < 1900 THEN 'before 1900'
WHEN indep_year <= 1930 THEN 'between 1900 and 1930'
ELSE 'after 1930' END
AS indep_year_group
FROM countries
ORDER BY indep_year_group;plpgsql if statement
if condition then
statements;
else
alternative-statements;
END if;Copyright © 2021 Codeinu
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