Search results
This MSAccess tutorial explains how to use the Access IsNull function with syntax and examples. The Microsoft Access IsNull function returns TRUE if the expression is a null value. Otherwise, it returns FALSE.
- And
The And function can be used in the following versions of...
- Or
MS Access: Or Function This MSAccess tutorial explains how...
- CurrentUser
The CurrentUser function can be used in VBA code in...
- While...Wend
The statements of code to execute each pass through the...
- For...Next
The statements of code to execute each pass through the...
- IsDate
MS Access: IsDate Function. This MSAccess tutorial explains...
- Environ Function
Example in VBA Code. The Environ function can be used in VBA...
- MS Access
This MSAccess tutorial explains how to use the Access &...
- And
The is_null () function checks whether a variable is NULL or not. This function returns true (1) if the variable is NULL, otherwise it returns false/nothing.
In PHP, what is the difference between is_null and ==null in PHP? What are the qualifications for both to return true?
The IsNull() function checks whether an expression contains Null (no data). This function returns a Boolean value. TRUE (-1) indicates that the expression is a Null value, and FALSE (0) indicates that the expression is not a Null value.
The null type. isset () - Determine if a variable is declared and is different than null. is_bool () - Finds out whether a variable is a boolean. is_numeric () - Finds whether a variable is a number or a numeric string. is_float () - Finds whether the type of a variable is float.
For example, you can use this function to convert a Null value to another value and prevent it from propagating through an expression. Or you can use: IIF(IsNull(MaritalStatus),"SINGLE",MaritalStatus)
9 sty 2024 · In this article, we will explore several ways to check if a variable is NULL in PHP, outlining the steps, code examples, performance considerations, and discussing the pros and cons of each method. Using is_null Function
