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  1. Dennis76

    Slow query when joining 2 tables

    Hello, I have 2 tables: invoices (1M records) and invoice_details (5M records) I want to select all invoices which containe artiklenr "1234": SELECT customernr from invoice_details d left join invoices i on i.invoicenr = d.invoicenr where artnr = 1234 This query takes about 3 seconds on a...

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