select cs_wsum(Volume,Close) from Quote_get('IBM'); cs_wsum ------------------ 55480.0006866455 (1 row) select cs_wavg(Volume,Close) from Quote_get('IBM'); cs_wavg ------------------ 36.9866668294271 (1 row) select cs_corr(High,Low) from Quote_get('IBM'); cs_corr ------------------- 0.999654253859527 (1 row) select cs_cov(High,Low) from Quote_get('IBM'); cs_cov --------------- 201.174396875 (1 row)