What Is SQL

Q

What Is SQL?

✍: fyicenter.com

A

Structured Query Language (SQL) is the most popular computer language used to create, retrieve, update and delete data from relational database management systems. SQL has been standardized by both ANSI and ISO.

2007-04-15, 4918👍, 0💬

What Is session_register()
What Is session_register()? - PHP Script Tips - Understanding and Using Sessions session_register() is old function that registers global variables into the current session. You should stop using session_register() and use array $_SESSION to save values into the current session now. 2007-04-14, 5373👍, 0💬

How To Tell If a Session Is New
How To Tell If a Session Is New? - PHP Script Tips - Understanding and Using Sessions There is not direct way to tell if a session is new or old. But you can design your site to have a required session value in all sessions. Then you can check the existence of this value in a session to determine if... 2007-04-17, 5127👍, 0💬

How To Remove Values Saved in the Current Session
How To Remove Values Saved in the Current Session? - PHP Script Tips - Understanding and Using Sessions If you want to remove values saved in the current session, you should use the unset() function on those saved values in $_SESSION, or use array() to empty $_SESSION: unset($_SESSION['MyColor']) - ... 2007-04-17, 4946👍, 0💬

What Is SQL
What Is SQL? Structured Query Language (SQL) is the most popular computer language used to create, retrieve, update and delete data from relational database management systems. SQL has been standardized by both ANSI and ISO. 2007-04-15, 4919👍, 0💬

How To Close a Session Properly
How To Close a Session Properly? - PHP Script Tips - Understanding and Using Sessions Let's say you site requires users to login. When a logged in user clicks the logout button, you need to close the session associated with this user properly in 3 steps: Remove all session values with $_SESSION = ar... 2007-04-17, 4896👍, 0💬

What Is SQL*Plus
What Is SQL*Plus? SQL*Plus is an Oracle command line utility used for executing SQL and PL/SQL commands. The GUI version is called SQL Worksheet. 2007-04-15, 4873👍, 0💬

What Are Date Functions
What Are Date Functions? Date Functions are ADD_MONTHS, LAST_DAY, NEXT_DAY, MONTHS_BETWEEN and SYSDATE. 2007-04-15, 4861👍, 0💬

What Are Character Functions
What Are Character Functions? Character Functions are INITCAP, UPPER, LOWER, SUBSTR and LENGTH. Additional functions are GREATEST and LEAST. 2007-04-15, 4838👍, 0💬

What Is NVL
What Is NVL? NVL is a function lets you substitute a value when a null value is encountered. 2007-04-15, 4754👍, 0💬

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