当前位置: 首页 > 图文教程 > 数据库 > MSSQL > SQL优化实例：从运行30分钟到运行只要30秒

MSSQL
mssql server 存储过程里，bulk insert table from ''路径+文件''，路径固定，文件名不固定的实现方法
请问在mssql“SQL事件探查器”里表格的标题，如CPU，Read，Write，Duration，SPID.........的解释
mssql server .ldf和.mdf的文件附加数据库的sql语句
[js]javascript与剪贴板交互
mssql中得到当天数据的语句
在SQL中使用convert函数进行日期的查询的代码
sql server中datetime字段去除时间的语句
sql语句优化之用EXISTS替代IN、用NOT EXISTS替代NOT IN的语句
推荐SQL Server 重新恢复自动编号列的序号的sql代码
清空MSSQL日志 与set recovery simple
mssql2005注入方法小结
[原创]比较详细的完美解决安装sql2000时出现以前的某个程序安装已在安装计算机上创建挂起的文件操作。
sql语句中如何将datetime格式的日期转换为yy-mm-dd格式
重装MS SQL Server 2000前必须彻底删除原安装文件的方法
SQL Server 不删除信息重新恢复自动编号列的序号的方法
MSSQL差异备份取系统权限的相关软件下载
解决MSSQL2005远程连接sql2000非默认端口数据库的问题
SQL命令大全-中英文对照
用SQL语句实现随机查询数据并不显示错误数据的方法
sql server不存在 sql server拒绝访问

No. « 7 8 9 10 »

技术文章搜索

关键字

MSSQL 中的 SQL优化实例：从运行30分钟到运行只要30秒

出处:互联网   整理: 软晨网（RuanChen.com）   发布: 2009-10-30   浏览: 50 ::
收藏到网摘: n/a

 以下的SQL语句在服务器需要运行长达30分钟才能完成:
SELECT     dbo.ComFlow.ComFlowCode, dbo.ComFlow.ComCode, dbo.ComFlow.CustCode, dbo.ComFlow.DepartCode, dbo.ComFlow.SaleCode,
                      dbo.ComFlow.EmpCode, dbo.ComFlow.Quantity * dbo.Commodity.ConvertRate AS Quantity, CONVERT(datetime, DATENAME(yyyy,
                      dbo.ComFlow.FlowDate) + '-' + DATENAME(mm, dbo.ComFlow.FlowDate) + '-' + DATENAME(dd, dbo.ComFlow.FlowDate)) AS FlowDate,
                      dbo.ComFlow.SalType, dbo.Employee.DepartCode AS DepartIn, dbo.Sale.DepartCode AS DepartOut,
                      dbo.ComFlow.Quantity * dbo.Commodity.TradePrice * dbo.Commodity.Discount / 100 AS Total, dbo.Department.GrpCode AS GrpCodeIn,
                      Department1.GrpCode AS GrpCodeOut
FROM         dbo.ComFlow INNER JOIN
                      dbo.Customer ON
                dbo.ComFlow.SalType IN (N'促销', N'流向退货', N'多级流向') AND dbo.ComFlow.CustCode = dbo.Customer.CustCode
                Or ComFlow_1.SalType IN (N'自然流向', N'自然流向退货') AND ComFlow_1.OutCustCode = Customer_1.CustCode
            INNER JOIN
                      dbo.CustomerRelation ON dbo.ComFlow.ComCode = dbo.CustomerRelation.ComCode AND
                      dbo.CustomerRelation.CustCode = dbo.Customer.CustCode INNER JOIN
                      dbo.Employee ON dbo.CustomerRelation.EmpCode = dbo.Employee.EmpCode INNER JOIN
                      dbo.Sale ON dbo.ComFlow.SaleCode = dbo.Sale.SaleCode INNER JOIN
                      dbo.Department ON dbo.Department.DepartCode = dbo.Employee.DepartCode INNER JOIN
                      dbo.Department AS Department1 ON Department1.DepartCode = dbo.Sale.DepartCode AND
                      dbo.Department.GrpCode <> Department1.GrpCode INNER JOIN
                      dbo.Commodity ON dbo.ComFlow.ComCode = dbo.Commodity.ComCode
WHERE     (NOT (dbo.ComFlow.SalType = N'流向退货')) OR
                      (NOT (dbo.Customer.Type = N'医药公司'))
虽然说，我们使用这个语句的应用是一个BI应用，实时性要求不高，但是，我觉得没有道理会运行这么久，应该有办法优