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創(chuàng)新互聯(lián)建站是創(chuàng)新、創(chuàng)意、研發(fā)型一體的綜合型網(wǎng)站建設(shè)公司,自成立以來公司不斷探索創(chuàng)新,始終堅(jiān)持為客戶提供滿意周到的服務(wù),在本地打下了良好的口碑,在過去的10多年時(shí)間我們累計(jì)服務(wù)了上千家以及全國政企客戶,如陽光房等企業(yè)單位,完善的項(xiàng)目管理流程,嚴(yán)格把控項(xiàng)目進(jìn)度與質(zhì)量監(jiān)控加上過硬的技術(shù)實(shí)力獲得客戶的一致贊譽(yù)。1 樓
哪一個(gè)PLSQL塊執(zhí)行之后會(huì)顯示下面的三行數(shù)字?
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A
DECLARE TYPE numbers_t IS TABLE OF NUMBER; l_numbers numbers_t := numbers_t (); BEGIN DBMS_OUTPUT.put_line (l_numbers.COUNT); l_numbers.EXTEND (); l_numbers (1) := 100; DBMS_OUTPUT.put_line (l_numbers.COUNT); l_numbers.EXTEND (); DBMS_OUTPUT.put_line (l_numbers.COUNT); END; /
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B
DECLARE TYPE numbers_t IS TABLE OF NUMBER; l_numbers numbers_t := numbers_t (); BEGIN DBMS_OUTPUT.put_line (l_numbers.COUNT); l_numbers.EXTEND (2); l_numbers (1) := 100; DBMS_OUTPUT.put_line (l_numbers.COUNT); l_numbers (2) := 100; DBMS_OUTPUT.put_line (l_numbers.COUNT); END; /
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C
DECLARE TYPE numbers_t IS TABLE OF NUMBER; l_numbers numbers_t := numbers_t (); BEGIN DBMS_OUTPUT.put_line (l_numbers.COUNT); l_numbers.EXTEND (2); l_numbers (1) := 100; l_numbers.DELETE (1); DBMS_OUTPUT.put_line (l_numbers.COUNT); l_numbers (2) := 100; DBMS_OUTPUT.put_line (l_numbers.COUNT); END; /
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D
DECLARE TYPE numbers_t IS TABLE OF NUMBER; l_numbers numbers_t := numbers_t (); BEGIN DBMS_OUTPUT.put_line (l_numbers.COUNT); l_numbers.EXTEND (2); l_numbers (1) := 100; l_numbers.DELETE (1); DBMS_OUTPUT.put_line (l_numbers.COUNT); l_numbers (1) := 200; l_numbers (2) := 100; DBMS_OUTPUT.put_line (l_numbers.COUNT); END; /
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