Find and replace text in MySQL and Oracle

Today someone told me that they have a blog with over 300 posts and just changed their URL, the problem is that the new blog still had reference to their previous blog's url. And all the images, and reference were to the previous URL which had a 401 re-direct to the new blog. The images, etc were already deleted from the previous blog and imported into the new URL.

He was actually going to update every single entry. I recommended that it the blog has all posts in it's SQL database and had to find all the fields which contained the text (old url address), with the new text (new url ).

Now I will show you and easy way to update this.

Go to your database SQL screen and type in as follows

UPDATE [your_table_name] SET [your_table_field] = REPLACE([your_table_field], '[string_to_find]' , '[string_to_be_replaced]');

example
UPDATE my_posts SET post_content = REPLACE(post_content, 'www.oldurl.com' , 'www.newurl.com');

So armed with only one query per column table combination, you can easily update your blog or database with the new text.

Setting preferred domain

When search engines find your website, they may come across, http://yourdomain.com or http://www.yourdomain.com, which is read as two domains, causing duplicate listings. To fix this you have to decide which web domain will be the preferred domain.

To set your domain in google, go to the www.google.com/webmasters/tools/ website and set your preferred domain.

After you set the preferred domain, you should force everyone to use this domain with a 301 redirect. You do this by editing your root .htaccess file, if hosted on a Linux server. If you do not have a .htaccess file you will need to create one first as follows:

1) Create a text file and name it .htaccess
2) Modify it with the preferred domain code (as details below)
3) Upload it to the root of your server (public www)

If you want people to redirect from non-WWW to WWW:
(for example, if someone types in http://yourdomain.com, it will forward to http://www.yourdomain.com)

RewriteEngine On
RewriteCond %{HTTP_HOST} !^(.*)\.yourdomain\.com$ [NC]
RewriteRule ^(.*)$ http://www.yourdomain.com/$1 [R=301,L]

If you want people to redirect from WWW to non-WWW:
(for example, if someone types in http://www.yourdomain.com, it will forward to http://yourdomain.com)

RewriteEngine On
RewriteCond %{HTTP_HOST} ^www\.yourdomain\.com$ [NC]
RewriteRule ^.*$ http://yourdomain.com%{REQUEST_URI} [R=301,L]

Don't forget to replace “yourdomain” with the URL of your domain, otherwise the code above won't work!

Therefore by setting a preferred domain you are ensuring that Google and all the major search engines will only index your url web links from one domain. This will help your PageRank in search engine rankings.

So don't put it off, set your preferred domain, if you have not done so already! You will see your PageRank rise!

Combine text using Concatenation in Oracle

When wanting to combine text you can use the concatenation operator

Examples:
To place comma after every row returned use as follows:
SELECT table_name ',' FROM user_tables;

You may have a date that you wish to place in a CSV file, you can concentate as follows:
SELECT 'the date today is: ' to_char(sysdate, 'MM-DD-YYYY') ',' FROM sys.dual;

Reverse function in Oracle

The following shows how to use the reverse function to reverse a string or number in Oracle.
SQL> select reverse('string') from dual;
REVERS
------
gnirts

However you may not have the function installed and can use the following procedure:
SQL>
SQL> create or replace procedure reverse(x in varchar2) as
2 a char(1);
3 i number;
4 begin
5 for i in 1..length(x) loop
6 select substr(x,length(x)-i+1,1) into c from dual;
7 dbms_output.put(a);
8 end loop;
9 dbms_output.put_line(' ');
10 end;
11 /


Procedure created.

SQL> set serverout on
SQL> exec reverse('Oracle')
elcarO

SQL> exec reverse('string')
gnirts
PL/SQL procedure successfully completed.

Get last 2 financial years quarters

The 'solution' below is to retrieve the start and end dates of annual quarters of the last 2 years, using the @end_date as your input parameter.

You can replace the '--- YOUR QUERY USING the @qtr_start and @qtr_end parameters' with your query, with the @qtr_start and @qtr_end as your search criteria.


DECLARE
@qtr_start DATETIME,
@qtr_end DATETIME,
@end_date DATETIME

-- your date parameter
SET @end_date = '2009-06-30'

-- initialise dates
SET @qtr_start = DATEADD(YYYY, -2, DATEADD(D,1, @end_date))
SET @qtr_end = DATEADD(DD, -1,DATEADD(M,3,@qtr_start))


WHILE @qtr_end <= @end_date
BEGIN
SELECT 'Quarter: '+convert(VARCHAR, @qtr_start, 3)+'-'+convert(VARCHAR, @qtr_end, 3),
@qtr_start,
@qtr_end

--- YOUR QUERY USING the @qtr_start and @qtr_end parameters

-- get rest of the quarters until end date
SET @qtr_start = DATEADD(DD, 1,@qtr_end)
SET @qtr_end = DATEADD(DD, -1,DATEADD(M,3,@qtr_start))
END

Display html php code in blogger

When posting the PHP menu post, I found the post to distort the html and php sections and found the following to blog which assist to fix the display html in Blogger or even Wordpress issue:

display html, javascript and php code in blogger

PHP Include menu and footer

Header and Footer Inclusion

This is a beginners tutorial on how to create and include header/footer files at the top and bottom of all pages in your site. This comes in very handy, for example, when you want to update something that is the same on each page such as a menu or copyright notice. You would only need to update a single file to have the changes appear on all pages of your site.

Let's pretend you wish to create have 20 web pages for your site with the same design and you want to change a link in your menu. You would have to edit all 20 pages, right? Nope, there's a much quicker way allowing you to edit just one file for the mene or footer and really it's not as hard as it sounds.

What you have to do is create a header file and a footer file. The header file contains all the HTML code for the top portion of your site. The footer contains the HTML for the bottom. Content goes between the header and footer. Let's get started...

This is an entire HTML document to give you an idea of what the header and footer are and where the content fits in. The header is in blue, content is in red, and footer is in green.

create a file named :
---------------------------------------------------
index.html
---------------------------------------------------
<html>
<head>
<title>Title of your website</title>
</head>
<body text=black link=blue alink=red vlink=purple>

<!--- menu at the top --->
<p align=center>
<a href='index.html'>Home</a> | <a href='about.html'>About My Site</a> | <a href='links.html'>Links</a>
</p>

This is the content of a page on my site.

<p align=center>Copyright 2009. All Rights Reserved</p>

</body>
</html>


---------------------------------------------------

After determining which portions are the header and footer, you need to cut and paste them into new files, lets name them header.html and footer.html.
The index.html file you are using as an example should only contain the content after this. Here's an example of how things are divided up.

---------------------------------------------------
header.html <html>
---------------------------------------------------
<head>
<title>Title of Site</title>
</head>
<body text=black link=blue alink=red vlink=purple>

<!--- menu at the top --->
<p align=center>
<a href='index.html'>Home</a> | <a href='about.html'>About My Site</a> | <a href='links.html'>Links</a>
</p>
---------------------------------------------------


---------------------------------------------------
footer.html
---------------------------------------------------
<p align=center>Copyright 2002. All Rights Reserved</p>

</body>
</html>


---------------------------------------------------
index.html
---------------------------------------------------
This is the content of a page on my site.
---------------------------------------------------


You now have header and footer HTML code in their own files. This means we can include these two files at the top and bottom (with content between) of any number of pages on our site. This is very convenient! For example, if you wanted to change a link in your menu, you would just edit it in header.html instead of every page of your site!


Now you only want to call the index page and have the header.html and footer.html included. The way to do this is to rename the page to index.php or anything.php as and add the follows:

---------------------------------------------------
index.php or anything.php for other pages on your site
---------------------------------------------------
<? include("header.html"); ?>

This is the content of a page on my site.

<? include("footer.html"); ?>
---------------------------------------------------

Oracle SQL Usage: PARTITION BY

PARTITION BY: divide the groups into subgroups

This example will demonstrate grouping all sales by month, per product.

SQL> -- create your table
SQL> CREATE TABLE all_sales (
2 year INTEGER,
3 month INTEGER,
4 prd_type_id INTEGER,
5 emp_id INTEGER ,
6 amount NUMBER(8, 2)
7 );

Table created.

SQL> -- ad data into your table
SQL>
SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2006,1 ,1 ,21 ,16034.84);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2006,2 ,1 ,21 ,15644.65);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2006,3 ,2 ,21 ,20167.83);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2006,4 ,2 ,21 ,25056.45);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2006,5 ,2 ,21 ,NULL);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2006,6 ,1 ,21 ,15564.66);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2006,7 ,1 ,21 ,15644.65);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2006,8 ,1 ,21 ,16434.82);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2006,9 ,1 ,21 ,19654.57);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2006,10 ,1 ,21 ,21764.19);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2006,11 ,1 ,21 ,13026.73);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2006,12 ,2 ,21 ,10034.64);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2005,1 ,2 ,22 ,16634.84);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2005,1 ,2 ,21 ,26034.84);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2005,2 ,1 ,21 ,12644.65);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2005,3 ,1 ,21 ,NULL);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2005,4 ,1 ,21 ,25026.45);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2005,5 ,1 ,21 ,17212.66);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2005,6 ,1 ,21 ,15564.26);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2005,7 ,2 ,21 ,62654.82);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2005,8 ,2 ,21 ,26434.82);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2005,9 ,2 ,21 ,15644.65);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2005,10 ,2 ,21 ,21264.19);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2005,11 ,1 ,21 ,13026.73);

1 row created.

SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP_ID,AMOUNT)
2 values(2005,12 ,1 ,21 ,10032.64);

1 row created.



SQL>
SQL> -- retrieve the records, just to check the content
SQL> --of the values inserted above
SQL> select * from all_sales;

YEAR MONTH PRD_TYPE_ID EMP_ID AMOUNT
---------- ---------- ----------- ---------- ----------
2006 1 1 21 16034.84
2006 2 1 21 15644.65
2006 3 2 21 20167.83
2006 4 2 21 25056.45
2006 5 2 21
2006 6 1 21 15564.66
2006 7 1 21 15644.65
2006 8 1 21 16434.82
2006 9 1 21 19654.57
2006 10 1 21 21764.19
2006 11 1 21 13026.73
2006 12 2 21 10034.64
2005 1 2 22 16634.84
2005 1 2 21 26034.84
2005 2 1 21 12644.65
2005 3 1 21
2005 4 1 21 25026.45
2005 5 1 21 17212.66
2005 6 1 21 15564.26
2005 7 2 21 62654.82
2005 8 2 21 26434.82
2005 9 2 21 15644.65
2005 10 2 21 21264.19
2005 11 1 21 13026.73
2005 12 1 21 10032.64

25 rows selected.

SQL>
SQL> --PARTITION BY: divide the groups into subgroups.
SQL> --calculate the total sales amount per month
SQL>
SQL>
SQL> SELECT
2 prd_type_id, month, SUM(amount),
3 RANK() OVER (PARTITION BY month ORDER BY SUM(amount) DESC) AS rank
4 FROM all_sales
5 where amount IS NOT NULL
6 GROUP BY prd_type_id, month
7 ORDER BY prd_type_id, month;

PRD_TYPE_ID MONTH SUM(AMOUNT) RANK
----------- ---------- ----------- ----------
1 1 16034.84 2
1 2 28289.3 1
1 4 25026.45 2
1 5 17212.66 1
1 6 31128.92 1
1 7 15644.65 2
1 8 16434.82 2
1 9 19654.57 1
1 10 21764.19 1
1 11 26053.46 1
1 12 10032.64 2
2 1 42669.68 1
2 3 20167.83 1
2 4 25056.45 1
2 7 62654.82 1
2 8 26434.82 1
2 9 15644.65 2
2 10 21264.19 2
2 12 10034.64 1

19 rows selected.

SQL>
SQL> --drop table
SQL> drop table all_sales;

Table dropped.

SQL>
SQL>

Tech Stuff

vfaz6379kx

can you believe it : A real SQL joke

Well as developers we noted for being different, with a totally different kind of humour. and found a real SQL joke at reddit, it goes like this:

A SQL query walks into a bar and sees two tables. He walks up to them and says 'Can I join you?'

There are heaps of comments follow them here.