用SQL语名合并列 合并A，B，C 3列变成如下 ABC 当A是数值,B,C均为字符时: select rtrim(cast(A as varchar))+rtrim(B)+rtrim(C) from tableName 合并A，B，C 3列变成如下 ABC 当A是数值,B,C均为字符时: select rtrim(cast(A as varchar))+rtrim(B)+rtrim(C) from tableName