sqlserver查询数据表所有字段名,查询当前并发连接数常用sql语句

【查询数据表所有字段名】
select COLUMN_NAME from INFORMATION_SCHEMA.Columns where table_name='sys_savings'
【查询数据库所有表】
SELECT name FROM sysobjects WHERE xtype = 'u'
【查询sa用户下占用的连接数】
sp_who 'sa'
【查询当前并发连接数】
select hostname,count(1) hostconncount from master.dbo.sysprocesses GROUP BY hostname ORDER BY count(1) desc