CREATE TABLE table_55700 ("D 41" CLOB, "D 42" CLOB, "D 43" CLOB, "D 44" CLOB, "D 45" CLOB, "D 46" CLOB, "D 47" CLOB, "R 53" CLOB, "R 52" CLOB, "R 51" CLOB)

I want the R 53 of D 41 of r 21
SELECT "R 53" FROM table_55700 WHERE "D 41" = 'r 21'
SELECT "R 53" FROM "table_55700" WHERE "D 41" = 'r 21'