Army intensifying Stinger air missile training as part of new strategic initiatives; Army takes the lead in virtual health technology with opening of new Texas facility; Army task force fights Boko Haram, terrorism in Cameroon with youth outreach; Army builds sustaining military partnership with Saudi Arabia
This SQL tutorial explains how to use the SQL EXISTS condition with syntax and examples. Click the Try It button next to an example to test it for yourself in our SQL Editor. The SQL EXISTS condition is used in combination with a subquery and is considered to be met, if the subquery returns at least one row.
This method also returns false if path is null, an invalid path, or a zero-length string. If the caller does not have sufficient permissions to read the specified file, no exception is thrown and the method returns false regardless of the existence of path. Remarks.The Exists method should not be used for path validation, this method merely checks if the file specified in path exists.o check if a directory exists, see Directory.Exists. Be aware that another process can potentially do something with the file in between the time you call the Exists method and perform another operation on the file, such as Delete. The path parameter is permitted to specify relative or absolute path information.