使用SQL Server中的循环逐个更新记录

Question

我有分区ID，需要更新扇区名称和分区短名称为‘扇区1’和‘扇区1’分别使用循环。我怎样才能做到这一点？

SectorID    SectorName  SectorShortName
---------------------------------------
1   METALS  METAL
2   FINANCIAL SERVICES  FINAN
3   IT  IT
4   SERVICES    SERVI
5   PHARMA  PHARM
6   CHEMICALS   CHEMI
7   TEXTILES    TEXTI
8   ENERGY  ENERG
9   INDUSTRIAL MANUFACTURING    INDUS
10  CEMENT & CEMENT PRODUCTS    CEMEN
11  CONSUMER GOODS  CONSU
12  CONSTRUCTION    CONST
13  TELECOM TELEC
14  AUTOMOBILE  AUTOM
15  HEALTHCARE SERVICES HEALT
16  FERTILISERS & PESTICIDES    FERTI
17  MEDIA & ENTERTAINMENT   MEDIA
18  PAPER   PAPER
19  PENDING UPDATION    PENDING
20  OTHERS  OTHERS
21  FINANCIAL SERVICES - HFC (AA and Above) FS-HFC-AA
22  Scheduled Commercial Bank   SCB
23  FINANCIAL SERVICES - PSU, PFI (AAA)     PSUPFIAAA
24  NO  NO
25  YES YES
26  FINANCIAL SERVICES - HFC (Below AA) FSHFC<AA
27  Other than PSU, PFI & PSB   Limit Appl
28  PSU PSU
29  PSB PSB
30  PFI PFI
31  SOVEREIGN   SOVEREIGN

Answer 1

您只需使用update

update sectors
    set SectorName = replace('sector [n]', '[n]', id),
        SectorShortName = replace('sector [n]', '[n]', id);

绝对没有理由为此使用循环。或者更具体地说，update使用基于集的操作覆盖表中的所有行，因此效率更高，代码更短。