sqlserver查詢數據表所有字段名,查詢當前併發連接數常用sql語句

【查詢數據表所有字段名】
select COLUMN_NAME from INFORMATION_SCHEMA.Columns where table_name='sys_savings'
【查詢數據庫所有表】
SELECT name FROM sysobjects WHERE xtype = 'u'
【查詢sa用戶下佔用的連接數】
sp_who 'sa'
【查詢當前併發連接數】
select hostname,count(1) hostconncount from master.dbo.sysprocesses GROUP BY hostname ORDER BY count(1) desc