CREATE TABLE table_name_28 (years_of_nba_experience_ VARCHAR, a_ VARCHAR, pos VARCHAR, team VARCHAR)

How many years of NBA experience does the player who plays position g for the Portland Trail Blazers?
SELECT years_of_nba_experience_ AS "a_" FROM table_name_28 WHERE pos = "g" AND team = "portland trail blazers"
SELECT "years_of_nba_experience_" AS "a_" FROM "table_name_28" WHERE "g" = "pos" AND "portland trail blazers" = "team"