You can have multiple CTEs in one query, as well as reuse a CTE: Note, however, that SQL Server may reevaluate the CTE each time it is accessed, so if you are using values like RAND(), NEWID() etc., they may change between the CTE calls.
The problem was that the ID column wasn’t getting any value. I saw on @Martin Smith SQL Fiddle that he declared the ID column with DEFAULT newid and I didn’t..
That would only happen if PostCode is missing a space. You could add conditionality such that all of PostCode is retrieved should a space not be found as follows
Easy: or if you just want one row:
Use the INFORMATION_SCHEMA.TABLES view to get the list of tables. Generate Drop scripts in the select statement and drop it using Dynamic SQL: Sys.Tables Version Note: If you have any foreign Keys defined between tables then first run the below query to disable all foreign keys present in your database. For more information, check here.
SQL Server 2012 and Later Just use Try_Convert instead: TRY_CONVERT takes the value passed to it and tries to convert it to the specified data_type. If the cast succeeds, TRY_CONVERT returns the value as the specified data_type; if an error occurs, null is returned. However if you request a conversion that is explicitly not permitted, then TRY_CONVERT … Read more
We face this error when we are selecting data from more than one tables by joining tables and at least one of the selected columns (it will also happen when use * to select all columns) exist with same name in more than one tables (our selected/joined tables). In that case we must have to specify from which table we are … Read more
It turns out that I had attempted to restore from a backup incorrectly. Initially I created a new database and then attempted to restore the backup here. What I should have done, and what worked in the end, was to bring up the restore dialog and type the name of the new database in the … Read more
From the error I take, that the data file cannot be opened: I think, you have to add a filename behind the \Desktop. Desktop is an existing directory and cannot be opened as file … And – btw – it might be necessary to add -S Servername… UPDATE Found this here Whenever I get this message, it’s because of one … Read more
It’s declaring the string as nvarchar data type, rather than varchar You may have seen Transact-SQL code that passes strings around using an N prefix. This denotes that the subsequent string is in Unicode (the N actually stands for National language character set). Which means that you are passing an NCHAR, NVARCHAR or NTEXT value, as opposed to … Read more