显示数据库表间的外键关系

    技术2022-05-11  108

    select foreign_key=b.name,        foreign_key_table=c.name,        foreign_key_columns          =isnull((select name from syscolumns                   where id=c.id and colid=a.fkey1),'')          +isnull((select ','+name from syscolumns                   where id=c.id and colid=a.fkey2),'')          +isnull((select ','+name from syscolumns                   where id=c.id and colid=a.fkey3),'')          +isnull((select ','+name from syscolumns                   where id=c.id and colid=a.fkey4),'')          +isnull((select ','+name from syscolumns                   where id=c.id and colid=a.fkey5),'')          +isnull((select ','+name from syscolumns                   where id=c.id and colid=a.fkey6),'')          +isnull((select ','+name from syscolumns                   where id=c.id and colid=a.fkey7),'')          +isnull((select ','+name from syscolumns                   where id=c.id and colid=a.fkey8),'')          +isnull((select ','+name from syscolumns                   where id=c.id and colid=a.fkey9),'')          +isnull((select ','+name from syscolumns                   where id=c.id and colid=a.fkey10),'')          +isnull((select ','+name from syscolumns                   where id=c.id and colid=a.fkey11),'')          +isnull((select ','+name from syscolumns                   where id=c.id and colid=a.fkey12),'')          +isnull((select ','+name from syscolumns                   where id=c.id and colid=a.fkey13),'')          +isnull((select ','+name from syscolumns                   where id=c.id and colid=a.fkey14),'')          +isnull((select ','+name from syscolumns                   where id=c.id and colid=a.fkey15),'')          +isnull((select ','+name from syscolumns                   where id=c.id and colid=a.fkey16),''),        primary_key_table=d.name,        primary_key_columns          =isnull((select name from syscolumns                   where id=d.id and colid=a.rkey1),'')          +isnull((select ','+name from syscolumns                   where id=d.id and colid=a.rkey2),'')          +isnull((select ','+name from syscolumns                   where id=d.id and colid=a.rkey3),'')          +isnull((select ','+name from syscolumns                   where id=d.id and colid=a.rkey4),'')          +isnull((select ','+name from syscolumns                   where id=d.id and colid=a.rkey5),'')          +isnull((select ','+name from syscolumns                   where id=d.id and colid=a.rkey6),'')          +isnull((select ','+name from syscolumns                   where id=d.id and colid=a.rkey7),'')          +isnull((select ','+name from syscolumns                   where id=d.id and colid=a.rkey8),'')          +isnull((select ','+name from syscolumns                   where id=d.id and colid=a.rkey9),'')          +isnull((select ','+name from syscolumns                   where id=d.id and colid=a.rkey10),'')          +isnull((select ','+name from syscolumns                   where id=d.id and colid=a.rkey11),'')          +isnull((select ','+name from syscolumns                   where id=d.id and colid=a.rkey12),'')          +isnull((select ','+name from syscolumns                   where id=d.id and colid=a.rkey13),'')          +isnull((select ','+name from syscolumns                   where id=d.id and colid=a.rkey14),'')          +isnull((select ','+name from syscolumns                   where id=d.id and colid=a.rkey15),'')          +isnull((select ','+name from syscolumns                   where id=d.id and colid=a.rkey16),''),        cascade_update=case when (b.status/8192)%2=1 then 'Y' else '' end,        cascade_delete=case when (b.status/4096)%2=1 then 'Y' else '' end   from sysreferences a,sysobjects b,sysobjects c,sysobjects d   where b.parent_obj in(select id from sysobjects                         where xtype='U' and name<>N'dtproperties')     and a.constid=b.id     and a.fkeyid=c.id     and a.rkeyid=d.id   order by foreign_key_table,foreign_key_columns

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