Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
My tests seem to confirm that
INSERT INTO a (x, y) SELECT y, x FROM b
maps b.y to a.x, i.e., the fields are matched only by ordinal position and not by name. Is this always the case, i.e., can I rely on that behaviour? Unfortunately, the documentation does not specify this (or I didn’t find it).
That is correct, SQL Server does not try to do any mapping of column names since you can apply any aliases to the source data that you like. It will always reference ordinal position.