הוספת רשומה ל - MySQL או לעדכן אם קיימת

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בעבר אם היינו צריכים להכניס רשומה לטבלא היינו צריכים לבדוק האם היא כבר קיימת ובמידה וכן אז לעדכן. בגרסאות חדשות של MySQL ואם בונים נכון את הטבלא והגדרת ה - Keys וה - Unique ניתן להשתמש:

INSERT INTO table (a,b,c) VALUES (1,2,3)
 ON DUPLICATE KEY UPDATE c=c+1
'

להכניס לטבלא ובאם ה- Key קיים אז לעדכן.

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