在 SQL 服务器中使用循环更新一条记录

Question

我有扇区 ID，需要使用循环将每个扇区 ID 的扇区名称和扇区短名称分别更新为 'Sector 1' 和 'Sector 1'。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 使用基于集合的操作覆盖 table 中的所有行，因此效率更高，代码更短。

在 SQL 服务器中使用循环更新一条记录

Update one by one records using loop in SQL Server

sql

sql-server

sql-server-2008

sql-server-2008-r2

sql-server-2012