![]() This statement disappeared from common usage as we became more set-oriented. This would open a file and buffer the first record (Rows and records were confused back then) in many of the early products. It existed because early SQL products were still based on filesystems. Its function was to return zero or exactly one row from a query. The original SELECT INTO in ANSI/ISO standard SQL is known as the "Singleton SELECT" and had nothing to do with copying data from one table to another. When creating a new target table, I noticed that none of the keys and indexes were created in the new table. Thank you for your informative article on SELECT INTO. If you want them present, you either use a CREATE TABLE statement followed by an INSERT INTO statement, or you use the SELECT INTO and create every index/constraint with a CREATE INDEX/CONSTRAINT statement. 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. Because this is only realistic with small tables, I’ve added the option to use. This can then be placed in source control and the table will be filled with the data on build. 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. The purpose of scripting out the insert statements is that you can create a table that is designed for static data and fill it with the required data in the same script. The maximum number is 3.As long as there is at least one connection open that is referencing the global ![]() The name 'log_db.companies' exceeds the maximum number of prefixes. Where "MYSQL" is a name of a linked server, "testdb" is a name of DB in MySQL Server, "companies" is a name of a table. To make it possible I've created a linked server in SMSS with this guide. I want to insert a new rows into database in MySQL server from SQL Server Management Studio. ![]()
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