You can make multiple calls to mysql_connect(), but if the parameters are the same you need to pass true for the ‘$new_link‘ (fourth) parameter, otherwise the same connection is reused.
Tag: database
How to connect MySQL Database with PHP
What does COALESCE do in SQL?
In SQL Server (Transact-SQL), the COALESCE function returns the first non-null expression in the list. If all expressions evaluate to null, then the COALESCE function will return null. SELECT COALESCE(NULL, NULL, ‘ErcanOPAK.com’, NULL, ‘blog.ErcanOPAK.com’); Result: ‘ErcanOPAK.com’ SELECT COALESCE(NULL, ‘ErcanOPAK.com’, ‘blog.ErcanOPAK.com’); Result: ‘ErcanOPAK.com’ SELECT COALESCE(NULL, NULL, 1, 2, 3, NULL, 4); Result: 1