select count(*) into :li_count from kctj where pro_code=:p1 and ck_code=:c1; 但相同的程序我在入库单是就能运行。。。。求大虾们帮忙解决 ...

Null or nonexistent data gets complicated when the application expects a data value and gets nothing or unexpected values; that's when you must perform coding that properly handles these situations to ...

Java provides a way for the programmer to exercise control over memory management by marking certain objects as expendable via reference objects. Should an application’s memory requirements quickly ...