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Tag:select

MySQL Calcolo dimensione db

Pubblicato il Luglio 15, 2024Aggiornato il Luglio 15, 2024di nx71Categorie:DB, MySQL
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MYSQL datafile

Pubblicato il Gennaio 25, 2024Aggiornato il Gennaio 25, 2024di nx71Categorie:DB, MySQL

Per trovare la posizione su filesystem dei datafile di MySQL, collegarsi al db come root ed eseguire la query: select @@datadir;

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Versione PostgreSQL

Pubblicato il Aprile 1, 2022Aggiornato il Aprile 1, 2022di nx71Categorie:DB, PostgreSQL, SQL

Per conoscere la versione di PostgreSQL in uso collegarsi come utente postgres ed avviare psql, eseguire la seguente query: postgres=# select version(); version PostgreSQL 9.6.17 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-39), 64-bit(1 row)

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Verificare aggiornamento statistiche su tabelle

Pubblicato il Luglio 26, 2021di nx71Categorie:DB, PostgreSQL

Per verificare a quando risale l’ultimo aggiornamento per le statistiche sulle tabelle usare la seguente query: SELECT schemaname, relname, last_analyze FROM pg_stat_all_tables WHERE relname = ‘<tabella>’;

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