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1. www.w3schools.com › SQL › func_sqlserver_isnullSQL Server ISNULL() Function - W3Schools

   www.w3schools.com › SQL › func_sqlserver_isnull

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   The ISNULL () function returns a specified value if the expression is NULL. If the expression is NOT NULL, this function returns the expression.

2. learn.microsoft.com › en-us › sqlISNULL (Transact-SQL) - SQL Server | Microsoft Learn

   learn.microsoft.com › en-us › sql

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   3 wrz 2024 · If a literal NULL is provided as check_expression, ISNULL returns the data type of the replacement_value. If a literal NULL is provided as check_expression and no replacement_value is provided, ISNULL returns an int .

3. www.sqlservertutorial.net › sql-server-system-functions › sql-server-isnull-functionSQL Server ISNULL Function

   www.sqlservertutorial.net › sql-server-system-functions › sql-server-isnull-function

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   Learn how to use the SQL Server ISNULL() function to replace NULL with a specified value. See syntax, examples and applications with numeric and character data types.

4. www.sqlshack.com › sql-isnull-function-2SQL ISNULL function - SQL Shack

   www.sqlshack.com › sql-isnull-function-2

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   10 maj 2019 · Learn how to use SQL ISNULL function to replace NULL values in expressions or table records with examples. See the syntax, data type conversion, and difference with IS NULL.

5. www.mssqltips.com › sqlservertip › 6776Using the SQL ISNULL() Function - SQL Server Tips

   www.mssqltips.com › sqlservertip › 6776

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   Learn how to use the SQL ISNULL function to check and replace NULL values in expressions, columns, or variables. See syntax, usage, and examples with AdventureWorks2017 database.

6. stackoverflow.com › questions › 334108How do I check if a Sql server string is null or empty

   stackoverflow.com › questions › 334108

   You can use ISNULL and check the answer against the known output: SELECT case when ISNULL(col1, '') = '' then '' else col1 END AS COL1 FROM TEST

7. www.sqltutorial.net › isnullISNULL – SQL Tutorial

   www.sqltutorial.net › isnull

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   Learn how to use the ISNULL function in SQL Server to handle NULL values in queries and expressions. See syntax, example, and alternative functions such as COALESCE, IFNULL, and IIF.