【key_constraints】什么意思_英语key_constraints的翻译_音标_读音_用法_例句_在线翻译

key constraint

键约束

• 键约束 （ Key Constraints ）：如果在一个联系R的实例中, 它所关联的实体A的实例最多只能出现在一个联系实例中，它就可以唯一确定该联系。

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键约束或限制

M N 1 (2)键约束或限制(Key Constraints) • 说明：前面所述联系型中所关联实体间的三种对应关系，实际上指的是一些约束，分别为：一对一约束、一对多约束和多对多约束...

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短语

FOREIGN KEY CONSTRAINTS 约束 ; 外键约束 ; 外键

primary key constraints 主键约束 ; 主键限制

更多收起网络短语

All DOC_IDs are unique to meet the foreign key constraints.

所有DOC_ID都是惟一的，以满足外键约束。

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Adding or dropping unique, distinct, or foreign key constraints.

添加或删除惟一、独特或外键约束。

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Minimize the triggers, CHECK and foreign key constraints, and generated columns for the table.

尽量减少表上的触发器、检查和外键约束以及生成的列。

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更多双语例句

"Lingering credit constraints are a key reason why I expect the strengthening in economic activity to be gradual, " says Federal Reserve Vice Chairman Donald Kohn.

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One of the key aspects of Launch KC is helping to reduce the cost constraints on launching tech companies.

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The key question is is the lower than expected number of countries due to supply constraints or higher than expected demand (or a combination of the two).

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应用推荐

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