sql database normalization tutorial

classic example of database use. It's okay if I understand it and use the data. I will be too lazy to write it again. If you encounter some problems, maybe this article will help you: http://blog.csdn.net/yangyuankp/article/details/7208413 In addition, we can see that the class table in this tutorial depends on the grade Table and the student table depends on the class table. Therefore, when deleting a

First, click on the desktop "SQL Server Management Studio" Open, sql2005 Manager, click "Connect" login, as shown: First, create a new database1. New DatabaseRight-click on "Database"--"New database", as shown in figure: MSSQL2005 Backup Restore Graphics tutorial Fill in the

Many need to use the SQL2005 program, there are a lot of novice or will operate, here to write a detailed picture and text tutorials to send a rookie, master please drift. For a friend using a stand-alone host, if you have not yet installed, follow this tutorial to install the SQL Server 2005 Graphics Installation tutorial, Ultra detailed The following is a deta

PHP tutorial PDO Connect and query the SQL database tutorial code $login = "root"; $passwd = "MySQL tutorial"; try{ $db =new PDO (' Mysql:host=localhost;dbname=mysql ', $login, $passwd); foreach ($db->query (' SELECT * from Test ') as $row) { Print_r ($row); } $db =null; }ca

PHP Import. sql file to MySQL database PHP tutorial Import. sql file to MySQL Tutorial database tutorial Set_time_limit (0); Setting the time-out to 0 indicates that it has been execu

. Click Activate (registration), notice to break the network first, waiting for a network error will be promptedSixth step.Click Activate manually (offline registration) Seventh step. Copy the code into the text box in the middle of the Registrar to generate the corresponding codeEighth step. Copy the generated code into the text box on the right and click FinishAttach the post-success about. SQL Compare 10.4.8.87 Edition Download CSDN: It is importan

The code is as follows:This.update = function (ID, name) {Database.transaction (Function (TX) {Tx.executesql ("Update stu Set name =?" Where id=? ",[Name, id],function (tx, result) {},Function (TX, error) {Alert (' Update failed: ' + error.message);});});}4) Delete data The code is as follows:This.del = function (ID) {Database.transaction (Function (TX) {Tx.executesql ("Delete from Stu where id=?",[ID],function (tx, result) {},Function (TX, error) {Alert (' Delete failed: ' + error.message ');}

One of the Red Gate series SQL Compare 10.4.8.87 Edition Database comparison tool complete hack + tutorialRed Gate Series two SQL Source control 3.0.13.4214 Edition Database version controller complete hack + use tutorialRed Gate Series Three SQL Server development tool

The following articles mainly introduce the basic tutorial of SQL coding optimization for the IBM DB2 database. The importance of such a specific query is that the more important the query is, you may need to optimize indexes by creating indexes. If you are coding the query that the CIO is running every day, make sure it provides the best performance. Therefore,

=cn.createstatement (); String SQL= "Select field 1, Field 2, Field 3, Field 4, field 5 from table name"; ResultSet RS=st.executequery (SQL); while(Rs.next ()) {String sno=rs.getstring ("Field 1"); String sname=rs.getstring ("Field 2"); String Sex=rs.getstring ("Field 3"); Java.sql.Date Birthday=rs.getdate ("Field four"); String SD=rs.getstring ("Field 5"); Out.print (Sno+ "," +sname+ "," +sex+ "," +birthd

down . Like what: in the Group by back Add ORDER BY null prevents sorting. 5. Use a connection to replace a subquery In some cases, you can use a connection to replace a subquery. Because using Join,mysql, you do not need to create temporary tables in memory. [Poor efficiency] SELECT * from Sales2 where company_id not in (select ID from Company2) [Simple handling method] [Left outer connection, highest efficiency] SELECT * FROM dept LEFT join EMP on DEPT.DEPTNO=EMP.DEPTNO; 6. Use li

database file tab and copy the path in the location (from the beginning to www.wangyeba.com, do not copy it later) Now we can see the newly created database www.wangyeba.com. Right-click the database www.wangyeba.com and choose all tasks> Restore database. A "Restore database