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Monday, 9 April 2012. Click on below links to read more about SQL Advanced topics. Posted by Raja k. Data types and ranges for Microsoft Access, MySQL and SQL Server. Microsoft Access Data Types. Use for text or combinations of text and numbers. 255 characters maximum. Memo is used for larger amounts of text. Stores up to 65,536 characters. You cannot sort a memo field. However, they are searchable. Allows whole numbers from 0 to 255. Allows whole numbers between -32,768 and 32,767. Posted by Raja k.

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Monday, 9 April 2012. Click on below links to read more about SQL Advanced topics. Posted by Raja k. Data types and ranges for Microsoft Access, MySQL and SQL Server. Microsoft Access Data Types. Use for text or combinations of text and numbers. 255 characters maximum. Memo is used for larger amounts of text. Stores up to 65,536 characters. You cannot sort a memo field. However, they are searchable. Allows whole numbers from 0 to 255. Allows whole numbers between -32,768 and 32,767. Posted by Raja k.

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Database tutorials | thedatabasetutorials.blogspot.com Reviews

https://thedatabasetutorials.blogspot.com

Monday, 9 April 2012. Click on below links to read more about SQL Advanced topics. Posted by Raja k. Data types and ranges for Microsoft Access, MySQL and SQL Server. Microsoft Access Data Types. Use for text or combinations of text and numbers. 255 characters maximum. Memo is used for larger amounts of text. Stores up to 65,536 characters. You cannot sort a memo field. However, they are searchable. Allows whole numbers from 0 to 255. Allows whole numbers between -32,768 and 32,767. Posted by Raja k.

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Database tutorials: SQL FOREIGN KEY Constraint

http://www.thedatabasetutorials.blogspot.com/2012/04/sql-foreign-key-constraint.html

Monday, 9 April 2012. SQL FOREIGN KEY Constraint. A FOREIGN KEY in one table points to a PRIMARY KEY in another table. Let's illustrate the foreign key with an example. Look at the following two tables:. Note that the "P Id" column in the "Orders" table points to the "P Id" column in the "Persons" table. The "P Id" column in the "Persons" table is the PRIMARY KEY in the "Persons" table. The "P Id" column in the "Orders" table is a FOREIGN KEY in the "Orders" table. O Id int NOT NULL,. P Id int,. P Id int,.

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Database tutorials: SQL DEFAULT Constraint

http://www.thedatabasetutorials.blogspot.com/2012/04/sql-default-constraint.html

Monday, 9 April 2012. The DEFAULT constraint is used to insert a default value into a column. The default value will be added to all new records, if no other value is specified. SQL DEFAULT Constraint on CREATE TABLE. The following SQL creates a DEFAULT constraint on the "City" column when the "Persons" table is created:. My SQL / SQL Server / Oracle / MS Access:. P Id int NOT NULL,. LastName varchar(255) NOT NULL,. City varchar(255) DEFAULT 'Sandnes'. O Id int NOT NULL,. OrderNo int NOT NULL,. P Id int,.

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Database tutorials: SQL NULL Functions

http://www.thedatabasetutorials.blogspot.com/2012/04/sql-null-functions.html

Monday, 9 April 2012. SQL ISNULL(), NVL(), IFNULL() and COALESCE() Functions. Look at the following "Products" table:. Suppose that the "UnitsOnOrder" column is optional, and may contain NULL values. We have the following SELECT statement:. SELECT ProductName,UnitPrice*(UnitsInStock UnitsOnOrder). In the example above, if any of the "UnitsOnOrder" values are NULL, the result is NULL. Microsoft's ISNULL() function is used to specify how we want to treat NULL values. SQL Server / MS Access. Posted by Raja k.

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Database tutorials: SQL CHECK Constraint

http://www.thedatabasetutorials.blogspot.com/2012/04/sql-check-constraint.html

Monday, 9 April 2012. The CHECK constraint is used to limit the value range that can be placed in a column. If you define a CHECK constraint on a single column it allows only certain values for this column. If you define a CHECK constraint on a table it can limit the values in certain columns based on values in other columns in the row. SQL CHECK Constraint on CREATE TABLE. P Id int NOT NULL,. LastName varchar(255) NOT NULL,. CHECK (P Id 0). SQL Server / Oracle / MS Access:. P Id int NOT NULL,. To drop a...

5

Database tutorials: SQL PRIMARY KEY Constraint

http://www.thedatabasetutorials.blogspot.com/2012/04/sql-primary-key-constraint.html

Monday, 9 April 2012. SQL PRIMARY KEY Constraint. The PRIMARY KEY constraint uniquely identifies each record in a database table. Primary keys must contain unique values. A primary key column cannot contain NULL values. Each table should have a primary key, and each table can have only ONE primary key. SQL PRIMARY KEY Constraint on CREATE TABLE. The following SQL creates a PRIMARY KEY on the "P Id" column when the "Persons" table is created:. P Id int NOT NULL,. LastName varchar(255) NOT NULL,. ADD CONST...

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FACTS: April 2012

http://investopediafacts.blogspot.com/2012_04_01_archive.html

Saturday, April 14, 2012. What Happens In An Internet Minute [Info graphic]. Everyone says that everything moves fast on the Internet, but just how fast are we talking about here? How much data gets shared across the Internet? While you calculate that in your head, take note that we are talking about emails, status posts, tweets and retweets, the downloading of apps and uploading of vacation pictures, streaming of online videos and music, online transactions and the list goes on. Friday, April 13, 2012.

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FACTS: What Happens In An Internet Minute [Info graphic]

http://investopediafacts.blogspot.com/2012/04/what-happens-in-internet-minute-info.html

Saturday, April 14, 2012. What Happens In An Internet Minute [Info graphic]. Everyone says that everything moves fast on the Internet, but just how fast are we talking about here? How much data gets shared across the Internet? While you calculate that in your head, take note that we are talking about emails, status posts, tweets and retweets, the downloading of apps and uploading of vacation pictures, streaming of online videos and music, online transactions and the list goes on.

investopediafacts.blogspot.com

FACTS: Who's Watching You On Facebook?

http://investopediafacts.blogspot.com/2012/04/whos-watching-you-on-facebook.html

Friday, April 13, 2012. Who's Watching You On Facebook? It seems that debt collectors have caught on to how difficult it is to hide on Facebook. According to MSN Money, debt collectors are infiltrating social network pages, contacting you, your friends and family through the site to force you to pay what you owe. If the answer is no, don't post it. There's really nowhere to hide on the world wide web. Subscribe to: Post Comments (Atom). What Happens In An Internet Minute [Info graphic].

investopediafacts.blogspot.com

FACTS: 15 Facts On Global Internet Usage

http://investopediafacts.blogspot.com/2012/04/15-facts-on-global-internet-usage.html

Saturday, April 14, 2012. 15 Facts On Global Internet Usage. Do you know which population surfed Internet the most? How many % of the world’s population come online everyday? How many countries still do not have Internet connection? Here are some interesting figure facts for you geeks who want to know more about the Internet usage. Full list after jump. 356% of internet users are Asian. With average of 389 million of internet surfers each month, Asia is the largest internet crowd among other world regions.

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FACTS: 50 Fascinating Facebook Facts And Figures

http://investopediafacts.blogspot.com/2012/04/50-fascinating-facebook-facts-and.html

Friday, April 13, 2012. 50 Fascinating Facebook Facts And Figures. The rise and rise of Facebook is producing a scramble by marketers and companies to leverage its huge global database and traffic. Google is looking over its shoulder as Facebook grows at over 10 million users a month and sits currently at number two on web traffic rankings according to Alexa.com. Last year Facebook surpassed Google for the top ranking for total time spent online. 50 Facebook Facts and Figures. 750 million photos were upl...

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Database tutorials

Monday, 9 April 2012. Click on below links to read more about SQL Advanced topics. Posted by Raja k. Data types and ranges for Microsoft Access, MySQL and SQL Server. Microsoft Access Data Types. Use for text or combinations of text and numbers. 255 characters maximum. Memo is used for larger amounts of text. Stores up to 65,536 characters. You cannot sort a memo field. However, they are searchable. Allows whole numbers from 0 to 255. Allows whole numbers between -32,768 and 32,767. Posted by Raja k.

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