TSQL之查询和管理表数据

1、标准查询
　　select  [all | distinct ] select_list　　对结果集相同行的处理
　　from table_name
　　[ where <search_condition> ]　　
　　[ group by <group_by_condition> ]
　　[ having <search_condition> ]
　　[order by <order_expression> [ ASC | DESC ] ]
2、