{ REGR_SLOPE | REGR_INTERCEPT | REGR_COUNT | REGR_R2 | REGR_AVGX | REGR_AVGY | REGR_SXX | REGR_SYY | REGR_SXY } ( expr1 , expr2 ) [OVER ( analytic_clause )]
For information on the symbols and conventions of Backus-Naur Form (BNF) syntax, see Appendix A.