I recently was working on a Magento Commerce website for a client that wanted to display all of the subcategories of a category on the category page, to improve basic navigation, and to further enhance and show the range of products that they carried.
The DB2 CONCAT function will combine two separate expressions to form a single string expression. It can leverage database fields, or explicitly defined strings as one or both expression when concatenating the values together.
The DB2 SUBSTR function returns a substring of a string. The SUBSTR function takes two arguments (source and start location) with an optional third argument (length).
The DB2 COALESCE function returns the value of the first non-NULL expression. The COALESCE function takes a comma separated list of arguments which are evaluated in the order in which they are specified and returns the first non-NULL value found.
Have you ever had the need to do a MySQL find and replace to quickly replace some data in your database? Fear not, MySQL has a nifty little string function, REPLACE, that allows a user to find and replace instances of a search string with a substitution string.
