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1 sty 2010 · SQL is primarily a set-orientated language - it's generally a bad idea to use a loop in it. In this case, a similar result could be achieved using a recursive CTE: with cte as (select 1 i union all select i+1 i from cte where i < 5) select dateadd(d, i-1, '2010-01-01') from cte
If you simply going to iterate each row for that table there is no need to create additional "Index" table, as UserId column is lready ordered and covered by an index. Therefore iteration.next() approach would be the most efficient.
14 lip 2012 · If you MUST have a loop, you can use a cursor: declare cur cursor fast_forward read_only for. select. CreatedDate, DateAdd(hour, 72, CreatedDate) [NewDate] from. tblEmpDetail. -- here, you would use the cursor. More information on cursors here: http://msdn.microsoft.com/en-us/library/ms180169.aspx.
15 cze 2020 · SQL Server loops are extremely powerful if you use them as they were intended to be used. Today, we’ve just scratched the surface, but all-important concepts were explained. In the upcoming article, we’ll show more complex examples and combine loops with other database objects.
In programming, a loop allows you to write a set of code that will run repeatedly within the same program. Many programming languages have several different types of loop to choose from, but in SQL Server there is only one: the WHILE loop.
SQL is a standard language for storing, manipulating and retrieving data in databases. Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems.
19 sty 2023 · Loops are powerful constructs in SQL Server that allow you to repeat a block of code multiple times. By understanding the different types of loops and how to use them effectively, you can write more efficient and flexible SQL scripts.
