Let’s say I am going to select the last 10 records of a table. The main consideration would be using the query:
SELECT recordId
FROM myTable
ORDER BY recordId DESC
LIMIT 10
The above query would select the last 10 records but they would not be returned in the order they were inserted into the table.

Today I experience hard time while writing wordpress plugin. The problem comes when I cannot insert post using wordpress function wp_insert_post. It failed when inserting the string “Each show lasts ’approximately’ ½ hour”. But to my surprise, I can write the string in wordpress editor and publish the post successfully. Nothing weird happens.
The error message [...]

Suppose you want to store the information in array to your database. So in your PHP script, you may try something like this:
$cars=array(“Volvo”,”BMW”,”Toyota”);
$query=”INSERT INTO tablename (cars)  VALUES(‘$cars’);
If you run the script you’ll get “Array” as your value in the database.