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You also can specify the NULL keyword in the VALUES clause to indicate that a column should be assigned a NULL value. The following example inserts values into three columns of the orders table: INSERT INTO orders (orders_num, order_date, customer_num) VALUES (0, NULL, 123);
Just enter 'NULL' (with single quote mark) into cell, SSMS will trim leading and ending single quote mark and save it as string 'NULL' . Without single quote mark, SSMS will treat input as NULL . Right! Even though the grid keeps showing the quotes, they are gone in the data.
Code Inspection: Insert NULL into NOT NULL column You cannot insert NULL values in col1 and col2 because they are defined as NOT NULL. If you run the script as is, you will receive an error. To fix this code, replace NULL in the VALUES part with some values (for example, 42 and 'bird' ).
INSERT INTO atable (x,y,z) VALUES ( NULL,NULL,NULL)
If you're using SSMS (or old school Enterprise Manager) to edit the table directly, press CTRL+0 to add a null.
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