动态SQL在sql server Procedure中的应用 CreatePROCEDURE[dbo].[Proc_Get_Serial_No] ( @Table_Namevarchar(20), @No_Filevarchar(20) ) AS Declare@Serial_Noint Begin Declare@Sqlnvarchar(max) Set@Sql='select @Serial_No= isnull(Max('+@No_File+'),0)+1 From '+@Table_Name+'' Executesp_exec...
In this tutorial, we’ll cover how to use the ISNULL() function in SQL Server, as well as some tips to make sure you’re applying ISNULL() correctly.
The next example’s variableisset to a value. It wouldn’t matter what that value was. It could even be an empty string. Since there is a value in the variable, it is not NULL. Now, the ISNULL function returns that value and ignores the potential replacement text. DECLARE@MSSQLTipsVAR...
COALESCE is one of the tools you have in SQL Server to work with NULL values. It may not be the first one you think of, but it can be a very good choice. In this tip I will provide examples of how you can use COALESCE to peacefully coexist with NULL values. Before we dig in to...
ISNULL() function is used to check the value is null or not in SQL Server. This function also provides a way to replace a value with the null if the result is true. Here @Param is a nullable parameter and isnull checks the parameter is a null value or not. If it is a null, ...
You may use an additionalAPPLYoperator to find the first record with notNULLvalue:...
useCOALESCE
Job should be stopped if value is 0. ALTER TABLE statement conflicted with the FOREIGN KEY constraint Alternative to using multiple REPLACE statements AlwaysUseDefaultCodePage: Can I change the default to True? An error occurred during local report processing. (Microsoft.ReportViewer.WinForms) An ...
The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (p A process is locking itself, means self lock A server cursor cannot be opened on the given statement or statements. Use a default ...
When referring to NULL within our data sets, we often use phrases such as “the NULL value” or “a value of NULL.” I do it all the time. I see it done all the time. Such phrases are so common that we think little of their use. But inherent in the p...