SQL – Divers

Exclure des données depuis une jointure :

utilisation de left join et condition is null

select * from t1 left join t2 on t1.numero = t2.numero where t2.date is null

 

Créer une sauvegarde d’une table :

create table schema.nom_table_sauvegarde as select * from ma_table_a_sauvegarder

 

 

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