Strcpy (sqlstring,"DELETE FROM STUDENT WHERE YEAR(BDATE)<=y;" Printf ("Enter birth year for deleting:") scanf ("%d",birth-year) /*用PREPRE语句定义sqlstring中SQL语句为命令 PURGE*/ EXEC SQL PREPARE PURGE FROM sqlstring; /*用birth-year取代y,并执行PURGE*/ EXEC SQL EXECUTE PURGE USING birth-ye Strcpy (sqlstring,"DELETE FROM STUDENT WHERE YEAR(BDATE)<= :y;") Printf ("Enter birth year for deleting:"); scanf("%d",birth-year); /*用PREPRE语句定义sqlstring中SQL语句为命令 PURGE*/ EXEC SQL PREPARE PURGE FROM ：sqlstring; /*用birth-year取代y，并执行PURGE*/ EXEC SQL EXECUTE PURGE USING :birth-year; · · ·