CREATE TABLE table_name_68 (text_symbol VARCHAR2, border VARCHAR2, type_of_sign VARCHAR2)

Which sign has a red border and a warning sign?
SELECT text_symbol FROM table_name_68 WHERE border = "red" AND type_of_sign = "warning"
SELECT "text_symbol" FROM "table_name_68" WHERE "border" = "red" AND "type_of_sign" = "warning"