how to fix oracle ORA-01722 invalid number error
If you have a numeric column, all you have to do is use a to_char with the right parameters; this should do the work:
SQL
Self Join to get employee manager name
EDIT: Left Join will work if emp_mgr_id is null.
Conversion failed when converting date and/or time from character string while inserting datetime
There are many formats supported by SQL Server – see the MSDN Books Online on CAST and CONVERT. Most of those formats are dependent on what settings you have – therefore, these settings might work some times – and sometimes not. The way to solve this is to use the (slightly adapted) ISO-8601 date format … Read more
The wait operation timed out. ASP
If you found the exact error “The wait operation timed out” then it is likely you have a database call that took longer than expected. This could be due to any number of things: Transient network problem High SQL server load Problem with SAN, RAID, or storage device Deadlock or other form of multiprocess contention … Read more
What is SELF JOIN and when would you use it? [duplicate]
You use a self join when a table references data in itself. E.g., an Employee table may have a SupervisorID column that points to the employee that is the boss of the current employee. To query the data and get information for both people in one row, you could self join like this:
The wait operation timed out. ASP
If you found the exact error “The wait operation timed out” then it is likely you have a database call that took longer than expected. This could be due to any number of things: Transient network problem High SQL server load Problem with SAN, RAID, or storage device Deadlock or other form of multiprocess contention … Read more
SQL Inner-join with 3 tables?
You can do the following (I guessed on table fields,etc) Based on your request for multiple halls you could do it this way. You just join on your Hall table multiple times for each room pref id:
Unknown column in ‘field list’ error on MySQL Update query
Try using different quotes for “y” as the identifier quote character is the backtick (“`”). Otherwise MySQL “thinks” that you point to a column named “y”. See also MySQL 5 Documentation
Unknown column in ‘field list’ error on MySQL Update query
Try using different quotes for “y” as the identifier quote character is the backtick (“`”). Otherwise MySQL “thinks” that you point to a column named “y”. See also MySQL 5 Documentation