A foreign key in a database links two tables by referencing the primary key of another table, ensuring relational integrity.
12, 18, 30, 54, ?, 198
79, 248, ?, 225, 125, 206
452, 369, ?, 217, 146, 79
8, 40, 160, 480, 960, ?
135, 148, ?, 184, 207, 236
3 2 3 6 14 ? 115.5
16, 24, 60, 210, ?, 5197.5
8 12 30 105 ? 2598.75
2.5, 5, 15, 60, ?, 1800, 12600
23 45 89 155 ? 353
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