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How To Write a Query with an Inner Join
How To Write a Query with an Inner Join? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements If you want to query from two tables with an inner join, you can use the INNER JOIN ... ON clause in the FROM clause. The following query returns output with an inner join from two tables: employees... 2007-04-19, 5204👍, 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, 5496👍, 0💬

Which HTML Tag Allows Users to Specify a File for Uploading
Which HTML Tag Allows Users to Specify a File for Uploading? - PHP Script Tips - Uploading Files to Web Servers To present an input field on your Web page to allow users to specify a local file to upload, you need to use the &lt;INPUT TYPE="FILE" ...> tag inside a &lt;FORM ...> tag. The &... 2007-04-19, 5257👍, 0💬

How To Define and Use Table Alias Names
How To Define and Use Table Alias Names? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements When column names need to be prefixed with table names, you can define table alias name and use them to prefix column names as shown in the following select statement: SQL> SELECT e.first_name, e.la... 2007-04-19, 5803👍, 0💬

How To Write the FORM Tag Correctly for Uploading Files
How To Write the FORM Tag Correctly for Uploading Files? - PHP Script Tips - Uploading Files to Web Servers When users clicks the submit button, files specified in the &lt;INPUT TYPE=FILE...> will be transferred from the browser to the Web server. This transferring (uploading) process is control... 2007-04-19, 5007👍, 0💬

How To Write a Query with a Left Outer Join
How To Write a Query with a Left Outer Join? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements If you want to query from two tables with a left outer join, you can use the LEFT OUTER JOIN ... ON clause in the FROM clause. The following query returns output with a left outer join from two ... 2007-04-19, 5478👍, 0💬

How To Perform Key Word Search in Tables
How To Perform Key Word Search in Tables? - PHP Script Tips - Working with MySQL Database The simplest way to perform key word search is to use the SELECT statement with a LIKE operator in the WHERE clause. The LIKE operator allows you to match a text field with a keyword pattern specified as '%keyw... 2007-04-19, 5353👍, 0💬

How To Query Multiple Tables Jointly
How To Query Multiple Tables Jointly? - PHP Script Tips - Working with MySQL Database If you want to query information stored in multiple tables, you can use the SELECT statement with a WHERE condition to make an inner join. Assuming that you have 3 tables in a forum system: "users" for user profile... 2007-04-19, 5301👍, 0💬

How To Get the Uploaded File Information in the Receiving Script
How To Get the Uploaded File Information in the Receiving Script? - PHP Script Tips - Uploading Files to Web Servers Once the Web server received the uploaded file, it will call the PHP script specified in the form action attribute to process them. This receiving PHP script can get the uploaded file... 2007-04-19, 5168👍, 0💬

How To Write a Query with a Right Outer Join
How To Write a Query with a Right Outer Join? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements If you want to query from two tables with a right outer join, you can use the RIGHT OUTER JOIN ... ON clause in the FROM clause. The following query returns output with a right outer join from ... 2007-04-19, 7882👍, 0💬

How To Quote Date and Time Values in SQL Statements
How To Quote Date and Time Values in SQL Statements? - PHP Script Tips - Working with MySQL Database If you want to provide date and time values in a SQL statement, you should write them in the format of "yyyy-mm-dd hh:mm:ss", and quoted with single quotes ('). The tutorial exercise below shows you ... 2007-04-19, 4964👍, 0💬

How To Process the Uploaded Files
How To Process the Uploaded Files? - PHP Script Tips - Uploading Files to Web Servers How to process the uploaded files? The answer is really depending on your application. For example: You can attached the outgoing emails, if the uploaded files are email attachments. You can move them to user's Web... 2007-04-19, 5046👍, 0💬

How To Write a Query with a Full Outer Join
How To Write a Query with a Full Outer Join? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements If you want to query from two tables with a full outer join, you can use the FULL OUTER JOIN ... ON clause in the FROM clause. The following query returns output with a full outer join from two ... 2007-04-19, 5286👍, 0💬

How To Quote Text Values in SQL Statements
How To Quote Text Values in SQL Statements? - PHP Script Tips - Working with MySQL Database Text values in SQL statements should be quoted with single quotes ('). If the text value contains a single quote ('), it should be protected by replacing it with two single quotes (''). In SQL language syntax... 2007-04-19, 5203👍, 0💬

How To Move Uploaded Files To Permanent Directory
How To Move Uploaded Files To Permanent Directory? - PHP Script Tips - Uploading Files to Web Servers PHP stores uploaded files in a temporary directory with temporary file names. You must move uploaded files to a permanent directory, if you want to keep them permanently. PHP offers the move_uploade... 2007-04-19, 5431👍, 0💬

How To Write an Inner Join with the WHERE Clause
How To Write an Inner Join with the WHERE Clause? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements If you don't want to use the INNER JOIN ... ON clause to write an inner join, you can put the join condition in the WHERE clause as shown in the following query example: SQL> SELECT d.depar... 2007-04-19, 5339👍, 0💬

How To Detect File Uploading Errors
How To Detect File Uploading Errors? - PHP Script Tips - Uploading Files to Web Servers If there was a problem for a file upload request specified by the &lt;INPUT TYPE=FILE NAME=fieldName...> tag, an error code will be available in $_FILES[$fieldName]['error']. Possible error code values are: U... 2007-04-19, 5387👍, 0💬

How To Write a Left Outer Join with the WHERE Clause
How To Write a Left Outer Join with the WHERE Clause? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements If you don't want to use the LEFT OUTER JOIN ... ON clause to write a left outer join, you can use a special criteria in the WHERE clause as "left_table.column = right_table.column(+)".... 2007-04-19, 5500👍, 0💬

How To Update an Existing Rows in a Table
How To Update an Existing Rows in a Table? - PHP Script Tips - Working with MySQL Database Updating existing rows in a table requires to run the UPDATE statement with a WHERE clause to identify the row. The following sample script updates one row with two new values: &lt;?php include "mysql_conn... 2007-04-19, 5075👍, 0💬

Why Do You Need to Filter Out Empty Files
Why Do You Need to Filter Out Empty Files? - PHP Script Tips - Uploading Files to Web Servers When you are processing uploaded files, you need to check for empty files, because they could be resulted from a bad upload process but the PHP engine could still give no error. For example, if a user typed... 2007-04-19, 4981👍, 0💬

How To Create a Table To Store Files
How To Create a Table To Store Files? - PHP Script Tips - Uploading Files to Web Servers If you using MySQL database and want to store files in database, you need to create BLOB columns, which can holds up to 65,535 characters. Here is a sample script that creates a table with a BLOB column to be us... 2007-04-19, 5220👍, 0💬

How To Name Query Output Columns
How To Name Query Output Columns? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements Each column in the query output has a default name. If you don't like the default name, you can specify a new name for any column in the query output by using the AS clause. The following statement shows y... 2007-04-19, 5560👍, 0💬

How To Query Tables and Loop through the Returning Rows
How To Query Tables and Loop through the Returning Rows? - PHP Script Tips - Working with MySQL Database The best way to query tables and loop through the returning rows is to run the SELECT statement with the catch the mysql_query() function, catch the returning object as a result set, and loop thr... 2007-04-19, 5157👍, 0💬

What Is a Subquery
What Is a Subquery? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements A subquery is a SELECT statement used as part of the selection criteria of the main SELECT statement. The subquery specified in the WHERE clause will be evaluated repeated on each row of the selection base table. The ou... 2007-04-19, 5173👍, 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