如何在ｓｑｌ中查询ｘｍｌ字符串

今天第一次尝试用xpath去搜索ｘｍｌ字符串，把自己写的ｓｑｌ帖在下面，以后参考

 

1  WITH  XMLNAMESPACES (
2      ' http://www.gamingstandards.com/s2s/schemas/v1.2.6/ '   AS  s2s,
3      ' http://s2s.igt.com/player-ext1/v1.0.0 '   as  p1)
4  select   cast (body  as  xml).value( ' (/s2s:s2sMessage/s2s:s2sBody/s2s:player/s2s:playerInfo/@p1:playerId)[1] ' , ' varchar(50) ' )  from  dbo.s2sOutBound_Complete 
5  where   cast (body  as  xml).exist( ' /s2s:s2sMessage/s2s:s2sBody/s2s:player/s2s:playerInfo ' )  = 1