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  • 查询表、字段、类型、是否主键、长度、小数位、是否允许空、默认值等详细查询

    效果

    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 字段序号,  
         a.name as 字段名,  
         (case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then ''else '' end) as 标识,  
         (case when (SELECT count(*) FROM sysobjects--查询主键  
                         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 主键,--查询主键END  
     b.name as 类型,  
     a.length as 占用字节数,  
     COLUMNPROPERTY(a.id,a.name,'PRECISION') as  长度,  
     isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as 小数位数,  
     (case when a.isnullable=1 then ''else '' end) as 允许空,  
     isnull(e.text,'') as 默认值,  
     isnull(g.[value],'') AS 字段说明   
     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
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  • 原文地址:https://www.cnblogs.com/ainidewen/p/9769858.html
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