STATS_CROSSTAB(expr1, expr2
               [, { 'CHISQ_OBS'
                  | 'CHISQ_SIG'
                  | 'CHISQ_DF'
                  | 'PHI_COEFFICIENT'
                  | 'CRAMERS_V'
                  | 'CONT_COEFFICIENT'
                  | 'COHENS_K'
                  }
               ]
              )