3.单独查询表的递增字段
--单独查询表递增字段
select [name] from syscolumns where
id=object_id(N'你的表名') and COLUMNPROPERTY(id,name,'IsIdentity')=1
4.获取表的主外键
--获取表主外键约束
exec sp_helpconstraint '你的表名' ;
5.相当完整的表结构查询
--很全面的表结构
exec sp_helpconstraint '你的表名' ; SELECT 表名 = CASE a.colorder WHEN 1 THEN c.name ELSE '' END, 序 = a.colorder, 字段名= a.name, 标识 = CASE COLUMNPROPERTY(a.id,a.name,'IsIdentity') WHEN 1 THEN '√' ELSE '' END, 主键 = CASE WHEN EXISTS ( SELECT * FROM sysobjects WHERE xtype='PK' AND 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)))) THEN '√' ELSE '' END, 类型= b.name, 字节数= a.length, 长度 = COLUMNPROPERTY(a.id,a.name,'Precision'), 小数 = CASE ISNULL(COLUMNPROPERTY(a.id,a.name,'Scale'),0) WHEN 0 THEN '' ELSE CAST(COLUMNPROPERTY(a.id,a.name,'Scale') AS VARCHAR) END, 允许空= CASE a.isnullable WHEN 1 THEN '√' ELSE '' END, 默认值= ISNULL(d.[text],''), 说明 = ISNULL(e.[value],'') FROM syscolumns a LEFT JOIN systypes b ON a.xtype=b.xusertype INNER JOIN sysobjects c ON a.id=c.id AND c.xtype='U' AND c.name<>'dtproperties' LEFT JOIN syscomments d ON a.cdefault=d.id LEFT JOIN sys.extended_properties e ON a.id=e.class AND a.colid=e.minor_id ORDER BY c.name, a.colorder |
6.获取所有的库名
--获取服务器中的所有库名
select * from master..sysdatabases
7.获取服务器上所有库的所有表
--获取服务器上所有库的所有表名
use master declare @db_name varchar(100) declare @sql varchar(200) declare cur_tables cursor for select name from sysdatabases /*where name like 'by_%'*/ open cur_tables fetch next from cur_tables into @db_name while @@fetch_status = 0 begin --set @db_name = @db_name + '.dbo.sysobjects' print @db_name set @sql = 'select * from ' + @db_name + '.dbo.sysobjects where xtype =''U''' exec (@sql) fetch next from cur_tables into @db_name end close cur_tables deallocate cur_tables go |
