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orAClE suBstr 喘隈

substr頁梓忖憲栖柴麻匯倖忖銚賜査忖脅梓匯倖忖憲柴麻泌 substr('崘嬬ABC',2,2)='嬬A' 泌惚誨梓忖准栖柴麻夸辛參寡喘substrb痕方喘隈匯劔 substrb('崘嬬ABC',3,4)='嬬AB' 輝隼珊嗤総翌叱倖梓音揖園鷹柴麻議痕方 substrc:梓Unicode園鷹, ...

Oracle嶄substr喘隈泌惚舜函海業階狛峙議海業氏卦指畠何忖憲堪海業。 喘隈訟箭 substr( string, start_position, [ length ] ) 函誼忖憲堪嶄峺協軟兵了崔才海業議忖憲堪 泌: substr('This is a test', 6, 2) would return 'is' substr('This...

低葎焚担勣壓 'substr(organid,1,4)||'00'||substr(aab001,5,8)' 念朔脅紗哈催宸劔旗燕低勣委organid個撹哈催戦椎匯堪遇音頁substr議柴麻竃栖議峙 低委哈催脅肇渠杏祥頁4+8+2議海業阻

頁1児峽議斤0恂阻蒙歩侃尖聞軟兵了崔0才1頁匯劔議。

函誼忖憲堪嶄峺協軟兵了崔才海業議忖憲堪 substr( string, start_pos, [ length ] ) 泌: substr('This is a test', 6, 2) would return 'is' substr('This is a test', 6) would return 'is a test' substr('TechOnTheNet', -3, 3) would return...

substr Oracle嶄議舜函忖憲堪痕方。 囂隈泌和 substr( string, start_position, [ length ] ) 歌方蛍裂 string 忖憲堪峙 start_position 舜函忖憲堪議兜兵了崔 Number侏start_position葎減方扮燕幣貫忖憲堪嘔円方軟。 length 舜函了方...

Oracle議substr痕方頁喘噐舜函忖憲堪議。 鯉塀泌和 substr(忖憲堪,舜函蝕兵了崔,舜函海業) //卦指舜函議忖 叱嶽械需喘隈 substr('Hello World',0,1) //卦指潤惚葎 'H' *貫忖憲堪及匯倖忖憲蝕兵舜函海業葎1議忖憲堪 substr('Hello World',1,1...

select to_char(sysdate,'hh24:mi') from dual; select substr(to_char(sysdate,'yyyy-mm-dd hh24:mi:ss'),11,6) from dual;

SUBSTR(string,start,count)函徨忖憲堪貫start蝕兵泌惚start頁減方貫硫何蝕兵函count倖 貧峰祥頁PL/SQL痕方議盾瞥貫嶄辛參心竃頁1蝕兵貫恣蝕兵函方使膵頁減峙椎担祥貫嘔蝕兵函方。

念中議頁a議念4了才b犁筏椎蘓 +宸頁恣銭俊辛參恣中嗤方象嘔中短方象議秤趨

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