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Встроенные SQL функции для работы со значением NULL в базах данных SQLite
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06/18/20
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Development / Databases
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SELECT coalesce('привет!', 1, 3, 'Вася', NULL);
SELECT coalesce(NULL, 12,'привет!', 1, 3, 'Вася', NULL);
SELECT coalesce(NULL, NULL, NULL, 1);
SELECT ifnull(NULL, '2014-10-31');
SELECT ifnull(NULL, NULL);
SELECT ifnull(99, NULL);
SELECT nullif(1, 2);
SELECT nullif(2, 'строка');
SELECT nullif('строка', 2);
SELECT nullif('строка', 'строка');
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