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| one-to-one relation | |||
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| one-to-one relationship (An association between two tables in which the primary key value of each record in the primary table corresponds to the value in the matching field or fields of one, and only one, record in the related table) | |||
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relacion uno a uno : 8 短语, 3 学科 |
| 信息技术 | 4 |
| 微软 | 2 |
| 电子产品 | 2 |