EXEC xp_cmdshell的bcp语法

Question

我似乎无法找到合适的格式，导出使用EXEC的xp_cmdshell在SQL Server Management BCP列名数据studio.I've尝试以下变化

EXEC xp_cmdshell bcp "select "a_id","b_id","c_id" union select a_id,b_id,c_id from tablename out 
"\\network_path\a.txt" -c -Uusername -Ppassword -Sservername" 

而且

EXEC xp_cmdshell bcp 'select 'a_id','b_id','c_id' union select a_id,b_id,c_id from tablename out 
'\\network_path\a.txt' -c -Uusername -Ppassword -Sservername' 

而且

EXEC xp_cmdshell bcp 'select "a_id","b_id","c_id" union select a_id,b_id,c_id from tablename out 
"\\network_path\a.txt" -c -Uusername -Ppassword -Sservername' 

而且

EXEC xp_cmdshell bcp "select 'a_id','b_id','c_id' union select a_id,b_id,c_id from tablename out 
'\\network_path\a.txt' -c -Uusername -Ppassword -Sservername" 

我已经成功地使用了下面的命令来导出表，但是我也需要列名。

bcp tablename out "\\network_path\a_test.txt" -c -Uusername -Ppassword -Sservername' 

Answer 1

好吧，您实际上需要订购标题行，使其显示在最上面。这应该处理它

EXEC xp_cmdshell 'bcp "select * from (select ''a_id'' as a_id,''b_id'' as b_id,''c_id'' as c_id union select a_id,b_id,c_id from tablename)q order by case a_id when ''a_id'' then 0 ELSE 1 END" queryout "\\networkpath\a.txt" -c -Uusername -Ppassword -Sservername -ddatabasename'