Which parameter is crucial when referencing a SQL column in sql_always_where from a joined view?

Which parameter is crucial when referencing a SQL column in sql_always_where from a joined view?

• A. join_type
• B. always_join
• C. sql_column
• D. view_name

Answer: (B)

The parameter that is crucial when referencing a SQL column in `sql_always_where` from a joined view is `always_join`. This parameter allows you to ensure that certain conditions are always applied to your query, regardless of the context from which the view is being called. When you define a join in Looker, using `always_join` signifies that this join should always be present in the SQL query generated, thereby making it possible for the `sql_always_where` condition to reference columns from the joined view without being removed during query optimization or without having to worry about whether the join is included in the context of a specific query. This ensures that the filters or conditions you set in `sql_always_where` are respected and correctly applied, helping to maintain data integrity and consistency in the results. In contrast, the other parameters either define types of joins, reference specific SQL columns, or denote view names, but none of these alone would guarantee the accessibility of the SQL column in the context of `sql_always_where` as effectively as `always_join` does.

The parameter that is crucial when referencing a SQL column in sql_always_where from a joined view is always_join. This parameter allows you to ensure that certain conditions are always applied to your query, regardless of the context from which the view is being called.

When you define a join in Looker, using always_join signifies that this join should always be present in the SQL query generated, thereby making it possible for the sql_always_where condition to reference columns from the joined view without being removed during query optimization or without having to worry about whether the join is included in the context of a specific query. This ensures that the filters or conditions you set in sql_always_where are respected and correctly applied, helping to maintain data integrity and consistency in the results.

In contrast, the other parameters either define types of joins, reference specific SQL columns, or denote view names, but none of these alone would guarantee the accessibility of the SQL column in the context of sql_always_where as effectively as always_join does.