CREATE TABLE table_46230 ("Tournament" CLOB, "1990" CLOB, "1991" CLOB, "1992" CLOB, "1993" CLOB, "1994" CLOB, "1995" CLOB, "1996" CLOB)

What is the 1993 value with a 1r in 1991 and sf in 1990?
SELECT "1993" FROM table_46230 WHERE "1991" = '1r' AND "1990" = 'sf'
SELECT "1993" FROM "table_46230" WHERE "1990" = 'sf' AND "1991" = '1r'