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SQL SERVER2005学习�W�记�Q�一�Q?索引

Sat, 10 Oct 2009 16:47:00 GMT

1.未指定order by子句�Ӟ��查询�l�果受到��索时使用到的索引影响�Q?br />

SELECT TOP 10000 IDENTITY(INT ,1,1) AS Pkid ,o.* INTO tempTable FROM sys.objects o,sys.[columns] c

CREATE CLUSTERED INDEX ixuc_pkid ON tempTable(pkid ASC)
--CREATE CLUSTERED INDEX ixuc_pkid ON tempTable(pkid DESC)

DROP INDEX dbo.tempTable.ixuc_pkid

(1) SELECT * FROM tempTable tt

CREATE INDEX cxde_objid ON dbo.tempTable(OBJECT_ID)

(2) SELECT * FROM tempTable tt ORDER BY tt.OBJECT_ID

DROP INDEX dbo.tempTable.ixuc_pkid

(3) SELECT * FROM tempTable tt ORDER BY tt.OBJECT_ID

通过CTRL+L查看(1)(2)(3)查询开销验证以上�l�论

2.指定order by子句�?除非受到

一杯清�?/a> 2009-10-11 00:47 发表评论

java 调用存储�q�程

Thu, 08 Jan 2009 03:07:00 GMT

//调用存储�q�程带参
            CallableStatement ca = conn.prepareCall("{call Login (?,?)}");
            ca.setString(1,username);
            ca.setString(2,password);
            ca.execute();

//调用存储�q�程带返回参数的
            CallableStatement ca = conn.prepareCall("{call Login (?,?,?)}");
            ca.setString(1,username);
            ca.setString(2,password);
            ca.registerOutParameter(3,java.sql.Types.INTEGER);
            ca.execute();
            int returnOut = ca.getInt(3);

//调用存储�q�程带返回值的return
            CallableStatement ca = conn.prepareCall("{?=call Login (?,?,?)}");
            ca.setString(2,username);
            ca.setString(3,password);
            ca.registerOutParameter(1,java.sql.Types.INTEGER);
            ca.execute();
            int returnOut = ca.getInt(1);

    //调用存储�q�程�q�回两个�l�果�?/font>
            CallableStatement ca = conn.prepareCall("{call Login (?,?,?)}");
            ca.setString(1,username);
            ca.setString(2,password);
            ca.execute();

            ResultSet rs = ca.getResultSet();
            while(rs.next())
            {
                System.out.println(rs.getInt(1)+rs.getString(2));
            }
         if(ca.getMoreResults())
            {
                rs = ca.getResultSet();
                while (rs.next()) {
                    System.out.println(rs.getInt(1) + rs.getString(2));
                }

一杯清�?/a> 2009-01-08 11:07 发表评论

Tue, 09 Sep 2008 03:52:00 GMT

摘要: 转（http://www.cnblogs.com/tenghoo/archive/2007/06/11/779240.html�Q?学生成�W�?stuscore)�Q? 姓名�Q�name 评��Q�subject ... 阅读全文

一杯清�?/a> 2008-09-09 11:52 发表评论