Bagaimana cara memeriksa tabel lain yang tidak memiliki data saat melakukan mysql join?

Tambahkan kondisi JIKA dalam kueri SQL, Kira-kira seperti ini.

SELECT invoice_details.invoice_no,
       invoice_details.invoice_date,
       invoice_details.invoice_amount,
       SUM(IF(received_amount_details.received_amount IS NULL
               OR received_amount_details.received_amount = '', 0.0,
               received_amount_details.received_amount)) AS totalreceiptamt
FROM   (SELECT DISTINCT invoice_no,
                        received_amount
        FROM   received_amount_details) AS received_amount_details
       right join invoice_details
               ON received_amount_details.invoice_no =
                  invoice_details.invoice_no
WHERE  invoice_details.proje_id = '7'
GROUP  BY invoice_details.invoice_no

Ini akan menambahkan 0,0 karena nilai defaultnya bukan accept_amount_details.received_amount IS NULL atau blank

Kami juga melakukan join yang tepat untuk mendapatkan semua nilai dari halaman invoice_details.

Anda dapat mempelajari lebih lanjut tentang kondisi IF di MYSQL di sini,

https://www.w3schools.com/mysql/func_mysql_if.asp https://dev.mysql.com/doc/refman/8.0 /en/if.html