Hello folks Checkout this scenario Table 1 columns -> | table_1_id (pkey) | some_column | comments | Table 2 columns -> | table_2_id (pkey) | some_other_column | table_1_id (fkey) | comments |
I\'ve got a django app, where I\'d like to define a relationship between two classes at a base level. It also makes sense to me to 开发者_如何学运维define the relationship between the children of thos
I need to make some changes to a SQL Server 2008 database. This requires the creation of a new table, and inserting a foreign key in the new table that references the Primary key of an already exist
Full disclosure...Trying feverishly here to learn more about databases so I am putting in the time and also tried to get this answer from the source to no avail.
As described in the image, I got a parent-Children relation and since the ParentID not accepting null values (and I can\'t change to nullabel due to some restriction in the UI I have), how can I rem
I know the pur开发者_如何转开发pose of \"Enforce foreign key constraint\" in RDBMS. But is there any benefit when it\'s set to \"NO\" ?In normal production, this setting should never be set to NO.
I\'m looking for some guidance as to how to set up a database I am creating.I think the best way to ask the question is to describe the specific scenario:
I\'m building a php page that will show an specific banner when the user enters his/her phone number in a form field.
EF 4 does not support associations that are not based on foreign/primary keys.There are lots of occasions where you need to navigate between tables using non-key fields.
I am testing(trying) squeryl\'s relations modeling feature class Foo(val id: Long, val foBar: Long) extends KeyedEntity[Long]{
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