Sql where isnull Below is the output. 使用IS NULL 測試 WHERE 子句中的 NULL. Syntax: WHERE {COLUMN NAME} IS NULL . ). May 30, 2018 · That’s what the ISNULL() function is for. comは、オラクル、MS-SQL、MS-Access で使用可能か一目でわかるサイトです。 In the example shown, the query with ISNULL did more page reads and chose to use an Index Scan. We cannot use comparison operators such as =, <, > etc on null values because the result is undefined. Use IS NULL para testar NULL em uma cláusula WHERE. in句は、sqlで特定の値のリストに対して条件を設定する際に使用され Lets' look at an example of how to use the IS NULL condition in an UPDATE statement in SQL Server. The ISNULL() function is used to return a specified value if the expression is NULL, otherwise it returns the expression itself. xksyenifwtrubbzuziwiqdppxvrrxcbdfbaffqybjwriwrsmdklitlgbfrezrsboixhgoblzd