Rather slow, but working method to include any of words: If you need all words to be present, use this: If you want something faster, you need to look into full text search, and this is very specific for each database type.
Your subquery is selecting two columns, while you are using it to project one column (as part of the outer SELECT clause). You can only select one column from such a query in this context. Consider joining to the users table instead; this will give you more flexibility when selecting what columns you want from … Read more
you should put those two dates between single quotes like.. or can use keep in mind that the first date is inclusive, but the second is exclusive, as it effectively is ‘2011/02/27 00:00:00’
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:
EDIT: Left Join will work if emp_mgr_id is null.
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
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
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:
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