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USE

Sintassi

USE nome_db

Spiegazione

L'istruzione 'USE nome_db' dice a MariaDB di utilizzare il database db_name come database predefinito (corrente) per le istruzioni successive. Il database rimane predefinito fino alla fine della sessione o fino a quando viene eseguita un'altra istruzione USE:

USE db1;
SELECT COUNT(*) FROM mia_tabella;   # seleziona da db1.mytable
USE db2;
SELECT COUNT(*) FROM mia_tabella;   # seleziona da db2.mytable
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