CREATE TABLE table_204_734 (id NUMBER, "first name" CLOB, "surname" CLOB, "death year" NUMBER, "beginning of\ service" CLOB, "end of\ service" CLOB, "notes" CLOB)

how long was pilzbach 's period of service ?
SELECT "end of\nservice" - "beginning of\nservice" FROM table_204_734 WHERE "first name" = 'pilzbach'
SELECT "end of\nservice" - "beginning of\nservice" FROM "table_204_734" WHERE "first name" = 'pilzbach'