Search notes:

SQL Server function: isNull

isNull(expr, val-if-expr-is-null)
isNull evaluates to the value of expr except if this value is null. In this case, the function evaluates to the value of val-if-expr-is-null.

See also

Oracle's equivalent of isNull is nvl (I am not sure if isNull also evaluates its expressions lazily, however).
The SQL Server function isNull behaves differently from VBA's/Access's isNull function.
T-SQL functions
Oracle's equivalent for isNull is roughly nvl.

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/developm...', 1758198431, '216.73.216.150', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/development/databases/SQL-Server/T-SQL/functions/isNull(47): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78