String Query : This is only supported in older versions. That is versions lower than v1.0.0

[JacobMJones]

How do I query string columns then?

[kitfit-dave]

Using the other method in the documentation: Query a DataFrame using a boolean mask

The example from Query by a string column in a DataFrame in the docs:

df.query(df.column('A').apply(val => val === 'Ng'))