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Just for fun, or to see if AI matches the experts, I've asked the question to Mixtral. This is what it is explaining:

Yes, I can certainly explain the difference between %ResultSet.SQL and %SQL.Statement in Intersystems Cache ObjectScript.

%ResultSet.SQL is a class that provides a result set interface for executing SQL queries. It allows you to iterate over the rows returned by a SQL query and access the columns as properties of each row. Here's an example of how to use %ResultSet.SQL:

SET rs = ##class(%ResultSet.SQL).%Open("SELECT * FROM mytable")
DO WHILE (rs.%Next()) {
    SET column1 = rs.column1
    SET column2 = rs.column2
    // Do something with the columns
}
rs.%Close()

On the other hand, %SQL.Statement is a class that provides a statement interface for executing SQL queries. It allows you to prepare a SQL statement and then execute it multiple times with different parameter values. Here's an example of how to use %SQL.Statement:

SET stmt = ##class(%SQL.Statement).%New()
DO stmt.%Prepare("SELECT * FROM mytable WHERE column1 = :val1 AND column2 = :val2")
DO stmt.%Execute(val1, val2)
DO WHILE (stmt.%Fetch()) {
    SET column1 = stmt.column1
    SET column2 = stmt.column2
    // Do something with the columns
}
stmt.%Close()

In summary, the main difference between %ResultSet.SQL and %SQL.Statement is that %ResultSet.SQL is used for iterating over the rows returned by a SQL query, while %SQL.Statement is used for preparing and executing a SQL statement multiple times with different parameter values.

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