DF001: The SELECT…INTO statement is used to create a table.
The topic describes the DF001 T-SQL code analysis rule.
Category
BEST PRACTICE
Message
The SELECT…INTO statement is used to create a table.
Description
It is not recommended to use the SELECT…INTO statement to create a table. Instead, create the table manually using the CREATE TABLE statement.
Additional information
The SELECT…INTO statement first creates a new table and then inserts rows into it. If the insertion operation fails or encounters an error, the inserted rows will be undone, and as a result, the new table will remain empty. If you want the entire operation to succeed or fail as a whole, consider using an explicit transaction.
Noncompliant code example
SELECT FirstName, LastName INTO #Customers FROM dbo.Customers
Compliant solution
CREATE TABLE #Customers(FirstName nvarchar(128), LastName nvarchar(128))
INSERT INTO #Customers (FirstName, LastName)
SELECT FirstName, LastName FROM dbo.Customers
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