If you don't want to specify values for columns that have default values, or you want to specify values to columns in an order different than how they are defined, you can provide a column list in the INSERT statement. If a column is omitted in the column, SQL Server applies 3 rules:* If default value is defined for the column, that default value will be used.* If no default value is defined for the column and NULL is allowed, NULL will be used.* If no default value is defined for the column and NULL is not allowed, SQL Server will reject the insert statement with an error.The following tutorial exercise gives you some good examples:INSERT INTO ggl_links (url, id)VALUES ('www.globalguideline.com',103)GO(1 row(s) affected)INSERT INTO ggl_links (id) VALUES (110)GOMsg 515, Level 16, State 2, Line 1Cannot insert the value NULL into column 'url',table 'GlobalGuideLineDatabase.dbo.ggl_links'; column doesnot allow nulls. INSERT fails.The statement has been terminated.SELECT * FROM ggl_linksGOid url notes counts created101 www.globalguideline.com NULL 0 2006-04-30102 www.globalguideline.com NULL 0 2007-05-19103 www.globalguideline.com NULL NULL 2007-05-19The first INSERT statement shows that: the order of the columns is reversed; the default value is taken for the un-specified column "created"; the NULL value is taken for the un-specified column "counts", since is has no default value defined and null is allowed.The second INSERT statement shows the error you get for the un-specified column "url", because it has no default value, and null is not allowed Database
Topic: SQL SERVER
How to provide column names in INSERT Statements in MS SQL Server?
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