Should I use != or <> for not equal in T-SQL? - Stack Overflow
2009年4月6日 · Yes; Microsoft themselves recommend using <> over != specifically for ANSI compliance, e.g. in Microsoft Press training kit for 70-461 exam, "Querying Microsoft SQL Server", they say "As an example of when to choose the standard form, T-SQL supports two “not equal to” operators: <> and !=. The former is standard and the latter is not.
IN vs OR in the SQL WHERE clause - Stack Overflow
2010年6月19日 · When dealing with big databases, which performs better: IN or OR in the SQL WHERE clause? Is there any difference about the way they are executed?
SQL: IF clause within WHERE clause - Stack Overflow
2008年9月18日 · Is it possible to use an IF clause within a WHERE clause in MS SQL? Example: WHERE IF IsNumeric(@OrderNumber) = 1 OrderNumber = @OrderNumber ELSE OrderNumber LIKE '%' + @
sql - Incorrect syntax near '' - Stack Overflow
I'm trying to run the following fairly simple query in SQL Server Management Studio: SELECT TOP 1000 * FROM master.sys.procedures as procs left join master.sys.parameters as params on p...
sql - ORA-01403: no data found - Stack Overflow
2015年4月28日 · I've a SQL query where if output is NULL it should not send warning . l_sup_id NUMBER; begin SELECT per_all_assignments_f.supervisor_id INTO l_sup_id FROM per_all_assignments_f WHERE
sql - Count work days between two dates - Stack Overflow
2008年10月31日 · How can I calculate the number of work days between two dates in SQL Server? Monday to Friday and it must be T-SQL.
SQL Server: The certificate chain was issued by an authority that is ...
2023年2月19日 · SQL Server: The certificate chain was issued by an authority that is not trusted [duplicate] Asked 2 years, 6 months ago Modified 1 year, 3 months ago Viewed 36k times
How do I perform an IF...THEN in an SQL SELECT?
2008年9月15日 · The CASE statement is the closest to IF in SQL and is supported on all versions of SQL Server. SELECT CAST( CASE WHEN Obsolete = 'N' or InStock = 'Y' THEN 1 ELSE 0 END AS bit) as Saleable, * FROM Product You only need to use the CAST operator if you want the result as a Boolean value. If you are happy with an int, this works: SELECT CASE WHEN …
sql - Exclude a column using SELECT * [except columnA] FROM …
We all know that to select all columns from a table, we can use SELECT * FROM tableA Is there a way to exclude column(s) from a table without specifying all the columns? SELECT * [except columnA]...
sql - How to find out what is locking my tables? - Stack Overflow
I have a SQL table that all of a sudden cannot return data unless I include with (nolock) on the end, which indicates some kind of lock left on my table. I've experimented a bit with sys.dm_tran_locks to identify that there are in fact a number of locks on the table, but how do I identify what is locking them (ie the request element of the sys ...