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public text v1 · immutableSELECT alias1.* FROM dbmail_aliases as alias1 left join dbmail_aliases as alias2 on alias1.alias = alias2.alias where ISNULL( alias2.alias )SELECT alias1.* FROM dbmail_aliases as alias1 left join dbmail_aliases as alias2 on alias1.alias = alias2.alias where ISNULL( alias2.alias )