Обсуждение: R: adding not null constraints on columns
ALTER TABLE myTable ADD CONSTRAINT constraintName CHECK (myColumn IS NOT NULL);
-----Messaggio originale-----
Da: Susan [mailto:brknrose@counterconspiracy.org]
Inviato: mercoledì 12 febbraio 2003 00:45
A: pgsql-sql@postgresql.org
Oggetto: [SQL] adding not null constraints on columns
Da: Susan [mailto:brknrose@counterconspiracy.org]
Inviato: mercoledì 12 febbraio 2003 00:45
A: pgsql-sql@postgresql.org
Oggetto: [SQL] adding not null constraints on columns
Is there a way to add not null constraints on a column after the column has been created? Any help would be appreciated. Thanks.
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