ON DELETE CASCADE—When a record is deleted from the parent table, all records in the child table with matching foreign key values are also deleted.
ON DELETECASCADE —当一条记录从父表中删除时,子表中的所有记录以及匹配的外键值都全部被删除。
When an ON delete CASCADE rule is active, all records in the child table with matching foreign key values are deleted when a record is deleted from the parent table.
当ONDELETECASCADE规则被激活时,当一条记录从父表中删除时,子表中的所有记录以及匹配的外键值都被删除。
"All of these things cascade in ways we're not necessarily aware of," adds Lange.
“所有这一切以我们不一定知晓的方式串接在一起,”Lange补充说。
In reality, it's up to you to decide whether you want your classes to maintain strict referential integrity (in other words, have all deletes cascade) or to allow a looser relationship.
实际上,您可以自己决定是否希望类保持严格的引用完整性(换句话说,所有删除操作都是级联的)或者允许更松散的关系。
It is surrounded by rugged green wilderness; to the west the Olympic Mountains, to the east the volcanoes and glaciers of the Cascade Range, and all around the brisk waters of the Northwest.
她的四周是起伏的绿色原野,往西是奥林匹克山,东面则是卡斯克特山脉的火山和冰川,整个城市被美国西北部富有生机的河流湖泊所环绕。
Research has suggested this kind of visualization releases a cascade of "feel good" chemicals, such as endorphins, into your system for an all-around energy boost.
研究指出,这种形象化的呈现能够不断地释放出“感觉很好”的化学物质,例如脑内啡,进入系统内进行全面的能量促进。
Although not all children who have been abused are affected the same way, decades of research show that child abuse initiates a cascade of negative social, emotional and health-related outcomes.
虽然儿童受到的虐待有多种方式,但几十年的研究显示儿童虐待会引发一系列反社会的、情绪化的、事关健康的后果。
The cascade attribute in the tag for the orders property, found in the customer mapping file, causes all of a customer's orders to be loaded automatically when the customer object is loaded.
由于Customer映射文件中的标签中的cascade属性的设置,程序会在加载Customer对象的时候自动加载orders对象。
In the JPA Details view, uncheck the Optional check box and check the All check box for the Cascade options, as shown in Figure 12.
在JPADetails视图中,取消Optional复选框的选择,并选中all复选框,如图12所示。
The development and trial of neuroprotective drugs have almost been launched in all links of ischemic cascade reaction.
几乎对缺血级联反应的所有环节都已进行过神经保护药物的开发和试验。
Set up annual HSSE target, and cascade the target to all departments so that they can set up their departmental targets.
设立HSSE年度目标,并传达给所有部门便于他们制定自己的部门目标。
In all but the lightest winds, this will be required to insure that the kite loses elevation during the Cascade.
除非是最小的风力,否则这样做是必要的,以确保风筝渐渐地下降高度。
The results show that quantum entanglement of all states from the coherent state to number state interacting with a cascade three level atom can be displayed by using the binomial field property.
结果表明,利用二项式光场的特性,可以揭示从相干态到数态之间的所有态光场与三能级原子相互作用时的量子纠缠性质。
As recent quantum cascade laser (QCL) is developing rapidly, all state QCL LIR will be one of the best study task on the LWIR LIR technology.
随着近年来量子级联半导体激光器(QCL)迅猛发展,全固化QCL激光成像雷达,将是未来长波红外激光成像雷达技术研究的热点之一。
The small power station above the cascade The cascade formed by the big height gap is magnificent. When pouring, its water smog and crash sound can be seen and heard all over the valley.
《飞瀑上的小电站》 流水巨大的落差形成的瀑布,气势磅薄,急流在瞬间飞泻而下,形成的水雾与冲击产生的轰鸣声,弥漫在整个山谷之间。
From the cascade of consequences that would be involved in the fact of rejecting all this enormous apparatus which remains all the same his support.
他对于后果的五花八门感到退缩。这些后果会牵涉到这个事实: 他必须拒绝所有始终作为他的支撑的这个巨大的工具。
All the problems mentioned above, restrict the cascade development of Huanghe River's hydroelectric.
所有这些问题的存在,严重制约了黄河上游水电梯级滚动开发。
Finally, Over-all loss coefficients in the cascade are obtained, considering effects of the shock wave passage and wake.
最后,连同通道区和尾迹区一起,求得了包括冲波影响的叶栅的总损失系数。
Connection tablet are set among all refrigeration galvanic cascade surfaces, and levels of refrigeration galvanic connected by electrical connection in parallel and hot connection in series.
各级制冷电偶叠面之间设置有连接片,使制冷电偶级与级之间并联电连接和串联热连接。
Connection tablet are set among all refrigeration galvanic cascade surfaces, and levels of refrigeration galvanic connected by electrical connection in parallel and hot connection in series.
各级制冷电偶叠面之间设置有连接片,使制冷电偶级与级之间并联电连接和串联热连接。
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