productionbas.blogg.se - Select into sql server

If you want to use INSERT INTO … SELECT, you can learn more aboutĪs I mentioned in the limitations section, indexes and constraints are not transferred from the source table.

SQL Server Performance of SELECT INTO vs INSERT INTO for temporary tables

Performance Improvement for SQL Server SELECT. You can read more about performance in the following tips: Using SELECT … INTO can have some performance benefits as the operation.Local vs Global SQL Server Temporary Tables. You can learn more about temporary tables in the tip.SELECT.INTO Enhancements in SQL Server 2017. SQL Server 2017 had some enhancements for the INTO clause.In this tip, Sergey introduces the construct with easy to followĮxamples and he also explains some more advanced concepts such as specifying A good introduction to the SELECT … INTO construct can be found inĬreating a table using the SQL SELECT INTO clause - Part 1 and.If you specify an ORDER BY clause, the order of the inserted rows is still.One exception is the IDENTITY constraint, but there are a couple of conditions. Like with partitioning, those properties are not transferred from the source

You cannot specify indexes, constraints, computed columns or triggers.

Even if the source table used in the SELECT is partitioned, There are some drawbacks when you use SELECT … INTO to create a new table. Once the stored proc is over, the data can be discarded.Įven though you can insert into a new temp table, you cannot use SELECT … For example, when you are debuggingĪ query, or in a stored procedure when you want to write intermediate results toĭisk. Using INTO and temp tables is useful when you want to dump data into a table,īut you only have use for it for a limited time. As long as there is at least one connection open that is referencing the global