ExampleGet your own SQL Server Return the first non-null value in a list: SELECTCOALESCE(NULL,NULL,NULL,'W3Schools.com',NULL,'Example.com'); Try it Yourself » Definition and Usage The COALESCE() function returns the first non-null value in a list. ...
SQL Server The SQL ServerISNULL()function lets you return an alternative value when an expression is NULL: SELECTProductName, UnitPrice * (UnitsInStock + ISNULL(UnitsOnOrder,0)) FROMProducts; or we can use theCOALESCE()function, like this: ...
https://www.w3schools.com/sql/func_sqlserver_coale... 收藏 赞 SQL——coalesce函数详解 2019年1月22日Oracle 19c的官网地址: https://docs.oracle.com/en/database/oracle/oracle-database/19/ladbi/operating-system-checklist-for-oracle-database-installation-on-li... https://blog.csdn.net/yilulv...
SELECT COALESCE(NULL, 1, 2, 'W3Schools.com'); Try it Yourself » SQL ALTER INDEX, In Oracle ALTER INDEX statement is used to change or rebuild an existing index. The index must be in your own schema or you must have to …
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Example Return the first non-null value in a list: SELECT COALESCE(NULL, NULL, NULL, 'W3Schools.com', NULL, 'Example.com'); Try it Yourself » Definition and UsageThe COALESCE() function returns the first non-null value in a list....