sqlserver常用命令收集（持续更新）

1.查看数据库日志使用率

DBCC SQLPERF(LOGSPACE)

2.查看表结构

sp_help tablename

sp_columns tablename

3.查询中添加行号

select ROW_NUMBER() over (order by main_id), main_id from MC_MF_JXYDJY

4.查询一个数据库中某个字段的位置

    declare @cloumns varchar(40)
declare @tablename varchar(40)
declare @str varchar(40)
declare @counts int
declare @sql nvarchar(2000)
declare MyCursor Cursor For 
Select a.name as Columns, b.name as TableName from syscolumns a,sysobjects b,systypes c 
where a.id = b.id
and b.type = 'U' 
and a.xtype=c.xtype
and c.name like '%char%'
set @str='张三'
Open MyCursor
Fetch next From MyCursor Into @cloumns,@tablename
While(@@Fetch_Status = 0)
Begin
 set @sql='select  @tmp_counts=count(*) from ' +@tablename+ ' where ' +@cloumns+' = ''' +@str+ ''''
execute sp_executesql  @sql,N'@tmp_counts int out',@counts out
 if @counts>0
 begin
 print '表名为:'+@tablename+',字段名为'+@cloumns
 end
Fetch next From MyCursor Into @cloumns,@tablename
End
Close MyCursor
Deallocate MyCursor

5.查询一个最近的执行语句

SELECT 
*
FROM 
    sys.dm_exec_query_stats QS
CROSS APPLY 
    sys.dm_exec_sql_text(QS.sql_handle) ST