Faster Than 100%
\'\'\'\nSELECT customer_id\nFROM Customer\nGROUP BY customer_id\nHAVING COUNT(DISTINCT product_key) = (SELECT COUNT(*) FROM Product);\n\'\'\'
\'\'\'\nSELECT customer_id\nFROM Customer\nGROUP BY customer_id\nHAVING COUNT(DISTINCT product_key) = (SELECT COUNT(*) FROM Product);\n\'\'\'
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