postgresql add not null constraint
alter table users alter column email set not null;postgresql add not null constraint
alter table users alter column email set not null;postgresql change column to not null
-- To change a column to NOT NULL:
ALTER TABLE products ALTER COLUMN product_no SET NOT NULL;postgres set null
UPDATE table1
SET column_a IS NULL
WHERE column_b = 'XXX';Copyright © 2021 Codeinu
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