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What Happens If Unique Value Constraints Are Violated
What Happens If Unique Value Constraints Are Violated? - MySQL FAQs - Understanding SQL INSERT, UPDATE and DELETE Statements If you are inserting a new record that has values violating a unique constraint, you will get an error. Note that primary key column has a unique value constraint by default. ... 2007-05-11, 5570👍, 0💬

How To Dump a Table to a File with "mysqldump"
How To Dump a Table to a File with "mysqldump"? - MySQL FAQs - Administrator Tools for Managing MySQL Server If you want to dump all rows in a table from the server to a file, you can use "mysqldump" with the "-f fileName" option as show in the following tutorial exercise: >cd \mysql\bin >mysqldump ... 2007-05-11, 5570👍, 0💬

What Are Date and Time Intervals
What Are Date and Time Intervals? - MySQL FAQs - Introduction to SQL Date and Time Handling A date and time interval is special value to be used to increment or decrement a date or a time at a given date or time unit. A data and time interval should be expression in the format of "INTERVAL expressio... 2007-05-11, 5568👍, 0💬

What Is File Upload
What Is File Upload? - PHP Script Tips - Uploading Files to Web Servers File upload is Web page function which allows visitor to specify a file on the browser's system and submit it to the Web server. This is a very useful function for many interactive Web sites. Some examples are: Web base email sy... 2007-04-19, 5568👍, 0💬

Do you know Use Case points
Do you know Use Case points? In CD we have a complete free PDF tutorial of how to prepare software quotation. It has all the estimation technology that today’s software industry uses. 2007-10-30, 5566👍, 0💬

Can you give a practical implementation of FAÇADE patterns
Can you give a practical implementation of FAÇADE patterns? Façade pattern sits on the top of lot of subsystems and makes access easy to interfaces of these subsystems. Basic purpose of Façade is to make interfacing between many modules and classes manageable. Above is a simple live application of ... 2007-10-24, 5566👍, 0💬

What are the steps to create a webservice and consume it
What are the steps to create a webservice and consume it ? Note :- For this question this book will make a attempt by creating a simple webservice and explaining steps to acheive it. A simple webservice will be created which takes two number and gives addition result of the two number. In CD sample ... 2007-10-23, 5566👍, 0💬

Relation between HTML and XHTML
What Is the Relation between HTML and XHTML? XHTML (Extensible Hyper-Text Markup Language) is the next generation of HTML. XHTML reproduces, subsets, and extends HTML with XML. So if you want to catch up with the new generation, you should start to compose your Web pages in with XHTML. For more info... 2007-03-03, 5566👍, 0💬

How To Update a Table Row with a Record
How To Update a Table Row with a Record? - Oracle DBA FAQ - Working with Database Objects in PL/SQL If you have a RECORD variable with data fields matching a table structure, you can update a row in this table with this RECORD variable using the UPDATE ... SET ROW statement as shown in the sample sc... 2007-04-26, 5564👍, 0💬

How to use a checkbox in a datagrid
How can I track event in checkbox which is one of the columns of a datagrid ? Note: - This is normally asked when the interviewer want to see that have you really worked practically on a project. Following are the steps to be done :- 1. In ASPX page you have to add Itemtemplate tag in datagrid. &... 2007-10-24, 5563👍, 0💬

What is Cache Callback in Cache
What is Cache Callback in Cache ? Cache object is dependent on its dependencies example file based, time based etc...Cache items remove the object when cache dependencies change.ASP.NET provides capability to execute a callback method when that item is removed from cache. 2007-10-23, 5563👍, 0💬

Handling Run-Time Exceptions
How does JSP handle run-time exceptions? You can use the errorPage attribute of the page directive to have uncaught runtime exceptions automatically forwarded to an error processing page. For example: redirects the browser to the JSP page error.jsp if an uncaught exception is encountered during requ... 2007-04-03, 5563👍, 0💬

What Is a Persistent Cookie
What Is a Persistent Cookie? - PHP Script Tips - Understanding and Managing Cookies A persistent cookie is a cookie which is stored in a cookie file permanently on the browser's computer. By default, cookies are created as temporary cookies which stored only in the browser's memory. When the browser... 2007-04-25, 5562👍, 0💬

How To Do Clean Up If CREATE DATABASE Failed
How To Do Clean Up If CREATE DATABASE Failed? - Oracle DBA FAQ - Creating New Database Instance Manually To better organize data files, you should create a dedicated directory for each Oracle database. This can be done by using Windows file explorer to create the \oraclexe\oradata\fyi\ directory. Tr... 2007-04-23, 5562👍, 0💬

How To Generate and Process a Form with the Same Script
How To Generate and Process a Form with the Same Script? - PHP Script Tips - Processing Web Forms In previous exercises, a Web form is generated by one script, and processed by another script. But you could write a single script to do both. You just need to remember to: Use same script name as the f... 2007-04-22, 5562👍, 0💬

What does isNaN function do?
What does isNaN function do? Return true if the argument is not a number. 2008-06-10, 5561👍, 0💬

What Privilege Is Needed for a User to Delete Rows from Tables in Another Schema
What Privilege Is Needed for a User to Delete Rows from Tables in Another Schema? - Oracle DBA FAQ - Managing Oracle User Accounts, Schema and Privileges For a user to delete rows from tables of someone else's schema, he/she needs the DELETE ANY TABLE privilege. The following tutorial exercise gives... 2007-05-01, 5561👍, 0💬

How To Generate a Form
How To Generate a Form? - PHP Script Tips - Processing Web Forms Generating a form seems to be easy. You can use PHP output statements to generate the required &lt;FORM> tag and other input tags. But you should consider to organized your input fields in a table to make your form looks good on th... 2007-04-23, 5560👍, 0💬

How Many Ways to Get the Current Time
How Many Ways to Get the Current Time? - MySQL FAQs - Introduction to SQL Date and Time Handling There are 8 ways to get the current time: SELECT NOW() FROM DUAL; 2006-07-01 10:02:41 SELECT CURRENT_TIME() FROM DUAL; 10:02:58 SELECT SYSDATE() FROM DUAL; 2006-07-01 10:03:21 mysql> SELECT CURRENT_TIMES... 2007-05-11, 5559👍, 0💬

How To Include Comments in SQL Statements
How To Include Comments in SQL Statements? - MySQL FAQs - Introduction to SQL Basics If you want to include comments in a SQL statement, you can first enter "--", then enter your comment until the end of the line. The tutorial exercise below shows you some good examples: SELECT 'Hello world!' FROM D... 2007-05-11, 5559👍, 0💬

How To Sort the Query Output
How To Sort the Query Output? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements If you want the returning rows to be sorted, you can specify a sorting expression in the ORDER BY clause. The following select statement returns rows sorted by the values in the "manager_id" column: SQL> SELEC... 2007-04-20, 5559👍, 0💬

Hot To Test Margin Spaces on All 4 Sides
Hot To Test Margin Spaces on All 4 Sides? - CSS Tutorials - HTML Formatting Model: Block, Inline and Floating Elements If you want test margin spaces on all 4 sides of a &lt;P> tag you can use the following HTML and CSS document. It allows you to specify margin spaces with different values and v... 2007-05-11, 5558👍, 0💬

Can List Elements Be Nested
Can List Elements Be Nested? - XHTML 1.0 Tutorials - Understanding Lists and List Items Yes. You can nest list element within each other because: List items can have block elements as contents. List elements are block elements. List items can have list elements as contents resulting nested list elem... 2007-05-11, 5558👍, 0💬

How to Loop through an Array
How to Loop through an Array? - PHP Script Tips - Understanding PHP Arrays and Their Basic Operations The best way to loop through an array is to use the "foreach" statement. There are two forms of "foreach" statements: foreach ($array as $value) {} - This gives you only one temporary variable to ho... 2007-04-20, 5558👍, 0💬

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.NET C C++ CSS DBA General HTML Java JavaScript JSP JUnit MySQL Networking Oracle Perl Perl PHP PL/SQL RSS Software QA SQL Server Struts Unix Windows XHTML XML