以'开头的标识符太长。最大长度为128

  • Z时代
  • 2024-01-10
  • 分类：问答

我将数据库转移到MS SQL Server 2008 R2，当我尝试保存长字符串时，它给了我最大长度错误，而我将它替换后将该列的数据类型设置为“文本”与“

varchar（max）”，但那里没有解决方案。

请为我提供一个解决此问题的解决方案。我正在执行以下查询：

update hotel 
set hotel_policy = 
    "Overview of Park Central New York - New York
    This hotel is making improvements.
        The property is undergoing renovations. The following areas are affected:
        Bar/lounge
        Business center
        Select guestrooms
    Every effort will be made to minimize noise and disturbance.
    Occupying a Beaux Arts building dating to 1927, Park Central New York Hotel is within a block of famed concert venue Carnegie Hall and within a 5-minute walk of Manhattan’s world-renowned Broadway theater district. Prefer the great outdoors to the Great White Way? Central Park is just 3 blocks from the hotel. There, you can rent a rowboat at the lake, play a game of tennis, or visit the Central Park Zoo. The international boutiques and flagship department stores of Fifth Avenue start within a 10-minute walk of the hotel. For travel to sights farther afield, there are 7 subway lines located within 3 blocks of the Park Central.
    The hotel has a snack bar for guests' convenience, and coffee and tea in the lobby.
    Retreat to your guestroom and sink into a bed with a pillowtop mattress and down comforter and pillows. Need to check email or finish up some work? You’ll find a desk with an ergonomic chair and wireless high-speed Internet access (surcharge). Unwind with a video game (surcharge) on the flat-panel HDTV."
where hotel_id = 1

我进行了很多搜索，但是找到的解决方案对我没有用。

谢谢！

回答：

根据ANSI SQL标准，对象标识符（例如，而不是字符串定界符（））使用双引号（如有 必要 ），UPDATE "hotel"

...)而"Overview of Park Central ..."SQL

Server在QUOTED_IDENTIFIERis时具有此行为ON。

使用单引号和双引号作为对象标识符（包括列别名）的分隔符的用法如下所述：

                        Delimiter   Delimiter
                        for         for
SET QUOTED_IDENTIFIER   Object ID   Alias ID        StringDelimiter
ON                      " or []     " or ' or []    '
OFF                     []          " or ' or []    " or '

  • ON那么双引号可以用作对象标识符（包括列别名）的定界符，单引号可以用作字符串文字和/或列别名（SELECT Column1 AS 'Alias1' ....）标识符的定界符。

  • OFF那么双引号可以用作列别名的定界符（SELECT Column1 AS "Alias1" ...）和字符串文字的定界符（SELECT "String1" AS Alias1 ...）。单引号可以用作字符串定界符，也可以用作列别名的定界符（SELECT Column1 ASAlias1 ...）。

改用单引号：

update hotel 
set hotel_policy = 'Overview of Park Central ...'
where hotel_id = 1

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