我们如何识别两个SQL Server表之间的关系，一对一或其他关系......？

Question

我们如何识别两个SQL Server表之间的关系，一对一或其他一些关系.....？

Answer 1

In SQL Server, create a new view in your database, add the two tables you want to see the relationship with.

Answer 2

If you wanna check what all tables are connected to the table, Just right click on table and go to View dependencies

and find out. And you can check all constrains by checking create query for that table.

i think it will help you out . thanks

Answer 3

You can use Microsoft system views for that purpose:

SELECT  
    obj.name AS fk
    ,sch.name AS [schema_name]
    ,tabParent.name AS [table]
    ,colParent.name AS [column]
    ,tabRef.name AS [referenced_table]
    ,colRef.name AS [referenced_column]
FROM sys.foreign_key_columns fkc
JOIN sys.objects obj ON obj.object_id = fkc.constraint_object_id
JOIN sys.tables tabParent ON tabParent.object_id = fkc.parent_object_id
JOIN sys.schemas sch ON tabParent.schema_id = sch.schema_id
JOIN sys.columns colParent ON colParent.column_id = parent_column_id AND colParent.object_id = tabParent.object_id
JOIN sys.tables tabRef ON tabRef.object_id = fkc.referenced_object_id
JOIN sys.columns colRef ON colRef.column_id = referenced_column_id AND colRef.object_id = tabRef.object_id
JOIN sys.schemas schRef ON tabRef.schema_id = schRef.schema_id
WHERE schRef.name = N'dbo'
AND tabRef.name = N'Projects'

It is possible to filter this query by referenced tables or columns, or just to look for everything that references a specific column.