How can I add text to SQL Column

问题:

I want to update 1 column in SQL Table. Example: Current value in column is like this

2013/09/pizzalover.jpg 
2013/10/pasta.jpg       

Now i want to update whole column like this : www.mypizza.com/2013/09/pizzalover.jpg Is there any way I can accomplish this? Thanks in advance

回答1:

You can simply update column using statement

update TableName set ColumnName  = 'www.mypizza.com/' + ColumnName  

回答2:

If you are using MYSql, you can use the concat() as :

update tableName set columnName= CONCAT('www.mypizza.com/', columnName);

SQLFiddle

If you are using oracle you can use the concatenation operator '||' as :

update tableName set "columnName"='www.mypizza.com/'||"columnName";

SQLFiddle

In SQL Server you can use + for string concatenation as:

update tableName set name='www.mypizza.com/'+columnName;

SQLFiddle

回答3:

You mean like this?:

SELECT 'www.mypizza.com/' + ColumnName AS ColumnName FROM TableName

Depending on the rest of your application environment, there is likely a much better way to accomplish this. But in terms of just using SQL to add static text to a column in a SELECT statement, you can just concatenate the text directly in the statement.

Or, if you wanted to UPDATE the column values, something like this:

UPDATE TableName SET ColumnName = 'www.mypizza.com/' + ColumnName

Same principle, just using an UPDATE instead of a SELECT, which will modify the underlying data instead of just modifying the view of the data.

回答4:

First get the information stored in your database and then edit it, you can do that like this:

<?php 
$query = "SELECT * FROM  `blog-posts`  WHERE `id` = 11";
$result = mysql_query($query);
$post = mysql_fetch_array($result);
$title = $post['title'];
$title .= "aapje";
echo $title
?>

And then update your database like normal:

$updateq = "UPDATE `blog-posts`  SET `title` = '$title' WHERE `id` = 11";