How Can I Replace T-SQL's COALESCE Function in Access SQL?

Replace T-SQL’s COALESCE function in Access SQL

The COALESCE function in T-SQL is used to return the first non-null value from a specified list of multiple values. This is useful for ensuring that a field always has a value, even if the value is null or empty.

In Access SQL, you can use the IIf function to achieve the same functionality. The IIf function accepts three parameters: a logical expression, the value returned if the expression is true, and the value returned if the expression is false.

For example, the following Access SQL expression will return the value of the Price field if the value of the Price field is not null, or 0 if it is null:

<code class="language-sql">"Price: IIf(IsNull([Price]), 0, [Price])"</code>

This expression can be used in queries, forms, and reports to ensure that a field always has a value, even if the underlying data is null.

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