类似于GROUP BY SUM() 用于字符串连接的语句

CREATE TABLE T ( [f1] VarCHAR(100), [f2] VarCHAR(100)) go INSERT INTO T   VALUES ('a','abc') INSERT INTO T   VALUES ('a','b') INSERT INTO T   VALUES ('b','XX') go SELECT    F1,   NameValues=STUFF( (SELECT ','+F2 FROM T    WHERE F1=Results.F1    FOR XML PATH(''))    ,1,1,'')   FROM T Results GROUP BY F1