crowds 2019-04-03
代码如下:
ALTER procedure [dbo].[PROC_ITEMMASTER_GETUNIQUE] @PAGEINDEX INT,@uid int,@itemnumber varchar(50) AS begin tran --开始事务 drop table [ItemMaster].[dbo].[testim] --删除表 --把不重复记录转存到testim中 select * into [ItemMaster].[dbo].[testim] from [ItemMaster].[dbo].[dat_item_master] where item_uid in(select min(item_uid) as item_uid from [ItemMaster].[dbo].[dat_item_master] group by item_number) and status=0 select top 10 * from [ItemMaster].[dbo].[testim] where item_uid not in (select top (10*(@PAGEINDEX-1)) item_uid from [ItemMaster].[dbo].[testim]) and owneruid=@uid and item_number like @itemnumber+'%' --判断是否出错 if @@error<>0 begin rollback tran --出错则回滚 end else begin --否则提前事务 commit tran end
代码如下:
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["SolutionSQLServer"].ToString()); SqlCommand cmd = new SqlCommand("Test",conn); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add("@MaxId", SqlDbType.Int).Value = 12000; SqlDataAdapter sda = new SqlDataAdapter(cmd); DataTable dt = new DataTable(); sda.Fill(dt);
代码如下:
--・@new_orderby 是传入参数,不能这样写 select top (10*(2-1)) item_uid from testim order by @new_orderby --执行这个的时候,SQL会出现 The SELECT item identified by the ORDER BY number 1 contains a variable as part of the expression identifying a column position. Variables are only allowed when ordering by an expression referencing a column name.
不过我找到解决办法,不过很麻烦,
http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=9328 (第二个回答用 ' sql '进行连接)
http://databases.aspfaq.com/database/how-do-i-use-a-variable-in-an-order-by-clause.html (用case end 也行)
4. select into 和 insert into select 两种复制文句 (这里感谢http://www.cnblogs.com/freshman0216/archive/2008/08/15/1268316.html)
1.INSERT INTO SELECT语句
语句形式为:Insert into Table2(field1,field2,...) select value1,value2,... from Table1
要求目标表Table2必须存在,由于目标表Table2已经存在,所以我们除了插入源表Table1的字段外,还可以插入常量。
2.SELECT INTO FROM语句
语句形式为:SELECT vale1, value2 into Table2 from Table1
要求目标表Table2不存在,因为在插入时会自动创建表Table2,并将Table1中指定字段数据复制到Table2中。
5.顺便复习下常用的SQL方法语句
代码如下:
declare @name varchar(200) --声明变量 set @name='abcd;def' --赋值 print 'exec len :'+Convert(varchar(10),Len(@name)) --convert(type,value)转换,Len(value)获取大小 print 'exec charindex:'+Convert(varchar(10),CharIndex('e',@name))--CharIndex(find,value) 在value中查找find的位置 print 'not replace:'+@name print 'exec replace:'+Replace(@name,';','') --用replace替换 print 'exec substring:'+Substring(@name,0,3)--用substring截取 print @@RowCount --返回上一行代码受影响的行数