小春BOOK

摘要： 1、行转换成列：if object_id('tablename')is not null drop table tablenameselect 'x1'as [name], '2006-01-01' as [date], 'aaaa' as nrinto tablenameunion select 'x1', '2006-01-02', 'bbbb'union select 'x3', '2006... 阅读全文