SQL SERVER 的 INFORMATION_SCHEMA 的使用

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-------------------------------------------------------第一個查詢看看庫裡有多少個表，表名等select * from INFORMATION_SCHEMA.TABLES;-------------------------------------------------------第二個查詢搜尋詳細 SELECT    (case when a.colorder=1 then d.name else ‘‘ end) as 表名,--如果表名相同就返回空       a.colorder as 欄位序號,       a.name as 欄位名,       (case when COLUMNPROPERTY( a.id,a.name,‘IsIdentity‘)=1 then ‘√‘else ‘‘ end) as 標識,       (case when (SELECT count(*) FROM sysobjects--查詢主鍵                       WHERE (name in                               (SELECT name FROM sysindexes                                WHERE (id = a.id)  AND (indid in                                       (SELECT indid FROM sysindexkeys                                         WHERE (id = a.id) AND (colid in                                           (SELECT colid FROM syscolumns                                           WHERE (id = a.id) AND (name = a.name))                           )))))            AND (xtype = ‘PK‘))>0 then ‘√‘ else ‘‘ end) as 主鍵,--查詢主鍵END   b.name as 類型,   a.length as 佔用位元組數,   COLUMNPROPERTY(a.id,a.name,‘PRECISION‘) as  長度,   isnull(COLUMNPROPERTY(a.id,a.name,‘Scale‘),0) as 小數位元,   (case when a.isnullable=1 then ‘√‘else ‘‘ end) as 允許空,   isnull(e.text,‘‘) as 預設值,   isnull(g.[value],‘‘) AS 欄位說明    FROM syscolumns a left join systypes b    on a.xtype=b.xusertype   inner join sysobjects d    on a.id=d.id and d.xtype=‘U‘ and d.name<>‘dtproperties‘   left join syscomments e   on a.cdefault=e.id   left join sys.extended_properties g   on a.id=g.major_id AND a.colid = g.minor_id    order by a.id,a.colorder

 

SQL SERVER 的 INFORMATION_SCHEMA 的使用