SQL Server：替换“＆amp;”字符实体（＆amp;）

Question

我有这个样本表：

表1

Column1
-------
Hi&Hello
Hello & Hi
Snacks & Drinks
   Hello World  

SQL Server中的

问题：，如何在不影响现有字符实体的情况下将所有&替换为字符实体（&）？

谢谢！

Answer 1

1. 如果您真的想在数据库中替换它，可以尝试运行

   UPDATE Table1 SET Column1 = REPLACE（Column1，'＆amp;'，'＆amp;'）;

2. 我想您要这样做，因为您希望在数据库中以完全相同的方式显示网站上的数据。所以我建议你在显示它时（在应用程序端）逃避，因为当你的数据库中有很多&或 时，它很难维护。

例如：

在php中，您可以使用htmlspecialchars();

在java中，您可以import static org.apache.commons.lang.StringEscapeUtils.escapeHtml;然后使用escapeHtml();

在ruby on rails上，你可以使用HTMLEntities.new.encode();（如果使用rails3或更新版本，默认情况下应该进行转义。）

Answer 2

我假设您问的原因是因为它不仅仅是您拥有的字符实体 - 我假设它超过5或6，因为如果它是一个小数字，那么简单的答案是运行更新声明每个字符实体在列的开头用一些字符组合替换＆符号（例如|＃|＃|＃）。这将需要子串等。然后将所有的＆符号更新为＆amp ;.然后运行另一个更新语句，用“＆”符号替换特殊的字符组合。你已经完成了。

假设它的字符集更加不同，这是一次性清理吗？如果没有，如果你期望它正在进行中，为什么系统将＆符号存储为仅仅是＆符号而其他东西作为字符实体？我先攻击这个问题。如果你无法控制，那么我的解决方案可能仍然有效，但需要进一步优化。

如果是一次性清理，我认为您需要创建一个临时使用的表，其中包含您可能在数据库中可能存在的所有字符实体的列表。您可以使用Google HTML字符实体查找带有剪切和粘贴的列表，这些列表可能会让您在不到30分钟的时间内生成此表格。

一旦你有了这张桌子，那么你的道路就相当清楚了。像其他人说的那样，你可能不希望像这样在DB中存储编码数据。在这种情况下，您只需编写一个游标并循环遍历使用replace语句进行更新的新的字符实体表。如果你真的想要只替换＆符号，那么你可以循环遍历游标并用每个字符实体开头的＆符替换列中可能永远不会存在的字符组合，否则像|＃|＃|＃实例。之后，DB中唯一的＆符号应该是实际的＆符号，而不是字符实体的一部分。那么就像我在第一段中提到的那样，它是最后两个步骤：你运行一个查询来将所有的＆符号更新为＆amp ;.然后运行另一个更新语句，将特殊的字符组合替换为实际的＆符号。

Answer 3

我想把这个放在某个地方供人们使用。而且由于Stackoverflow也是知识的维基：

--https://www.w3.org/TR/xml-entity-names/bycodes.html
UPDATE Items SET Name = REPLACE(Name, '&',      NCHAR(38))
UPDATE Items SET Name = REPLACE(Name, '<',       NCHAR(60))
UPDATE Items SET Name = REPLACE(Name, '>',       NCHAR(62))
UPDATE Items SET Name = REPLACE(Name, 'À',   NCHAR(192))
UPDATE Items SET Name = REPLACE(Name, 'Á',   NCHAR(193))
UPDATE Items SET Name = REPLACE(Name, 'Â',    NCHAR(194))
UPDATE Items SET Name = REPLACE(Name, 'Ã',   NCHAR(195))
UPDATE Items SET Name = REPLACE(Name, 'Ä',     NCHAR(196))
UPDATE Items SET Name = REPLACE(Name, 'Å',    NCHAR(197))
UPDATE Items SET Name = REPLACE(Name, 'Æ',    NCHAR(198))
UPDATE Items SET Name = REPLACE(Name, 'Ç',   NCHAR(199))
UPDATE Items SET Name = REPLACE(Name, 'È',   NCHAR(200))
UPDATE Items SET Name = REPLACE(Name, 'É',   NCHAR(201))
UPDATE Items SET Name = REPLACE(Name, 'Ê',    NCHAR(202))
UPDATE Items SET Name = REPLACE(Name, 'Ë',     NCHAR(203))
UPDATE Items SET Name = REPLACE(Name, 'Ì',   NCHAR(204))
UPDATE Items SET Name = REPLACE(Name, 'Í',   NCHAR(205))
UPDATE Items SET Name = REPLACE(Name, 'Î',    NCHAR(206))
UPDATE Items SET Name = REPLACE(Name, 'Ï',     NCHAR(207))
UPDATE Items SET Name = REPLACE(Name, 'Ð',      NCHAR(208))
UPDATE Items SET Name = REPLACE(Name, 'Ñ',   NCHAR(209))
UPDATE Items SET Name = REPLACE(Name, 'Ò',   NCHAR(210))
UPDATE Items SET Name = REPLACE(Name, 'Ó',   NCHAR(211))
UPDATE Items SET Name = REPLACE(Name, 'Ô',    NCHAR(212))
UPDATE Items SET Name = REPLACE(Name, 'Õ',   NCHAR(213))
UPDATE Items SET Name = REPLACE(Name, 'Ö',     NCHAR(214))
UPDATE Items SET Name = REPLACE(Name, 'Ø',   NCHAR(216))
UPDATE Items SET Name = REPLACE(Name, 'Ù',   NCHAR(217))
UPDATE Items SET Name = REPLACE(Name, 'Ú',   NCHAR(218))
UPDATE Items SET Name = REPLACE(Name, 'Û',    NCHAR(219))
UPDATE Items SET Name = REPLACE(Name, 'Ü',     NCHAR(220))
UPDATE Items SET Name = REPLACE(Name, 'Ý',   NCHAR(221))
UPDATE Items SET Name = REPLACE(Name, 'Þ',    NCHAR(222))
UPDATE Items SET Name = REPLACE(Name, 'ß',    NCHAR(223))
UPDATE Items SET Name = REPLACE(Name, 'à',   NCHAR(224))
UPDATE Items SET Name = REPLACE(Name, 'á',   NCHAR(225))
UPDATE Items SET Name = REPLACE(Name, 'â',    NCHAR(226))
UPDATE Items SET Name = REPLACE(Name, 'ã',   NCHAR(227))
UPDATE Items SET Name = REPLACE(Name, 'ä',     NCHAR(228))
UPDATE Items SET Name = REPLACE(Name, 'å',    NCHAR(229))
UPDATE Items SET Name = REPLACE(Name, 'æ',    NCHAR(230))
UPDATE Items SET Name = REPLACE(Name, 'ç',   NCHAR(231))
UPDATE Items SET Name = REPLACE(Name, 'è',   NCHAR(232))
UPDATE Items SET Name = REPLACE(Name, 'é',   NCHAR(233))
UPDATE Items SET Name = REPLACE(Name, 'ê',    NCHAR(234))
UPDATE Items SET Name = REPLACE(Name, 'ë',     NCHAR(235))
UPDATE Items SET Name = REPLACE(Name, 'ì',   NCHAR(236))
UPDATE Items SET Name = REPLACE(Name, 'í',   NCHAR(237))
UPDATE Items SET Name = REPLACE(Name, 'î',    NCHAR(238))
UPDATE Items SET Name = REPLACE(Name, 'ï',     NCHAR(239))
UPDATE Items SET Name = REPLACE(Name, 'ð',      NCHAR(240))
UPDATE Items SET Name = REPLACE(Name, 'ñ',   NCHAR(241))
UPDATE Items SET Name = REPLACE(Name, 'ò',   NCHAR(242))
UPDATE Items SET Name = REPLACE(Name, 'ó',   NCHAR(243))
UPDATE Items SET Name = REPLACE(Name, 'ô',    NCHAR(244))
UPDATE Items SET Name = REPLACE(Name, 'õ',   NCHAR(245))
UPDATE Items SET Name = REPLACE(Name, 'ö',     NCHAR(246))
UPDATE Items SET Name = REPLACE(Name, 'ø',   NCHAR(248))
UPDATE Items SET Name = REPLACE(Name, 'ù',   NCHAR(249))
UPDATE Items SET Name = REPLACE(Name, 'ú',   NCHAR(250))
UPDATE Items SET Name = REPLACE(Name, 'û',    NCHAR(251))
UPDATE Items SET Name = REPLACE(Name, 'ü',     NCHAR(252))
UPDATE Items SET Name = REPLACE(Name, 'ý',   NCHAR(253))
UPDATE Items SET Name = REPLACE(Name, 'þ',    NCHAR(254))
UPDATE Items SET Name = REPLACE(Name, 'ÿ',     NCHAR(255))
UPDATE Items SET Name = REPLACE(Name, ' ',     NCHAR(160))
UPDATE Items SET Name = REPLACE(Name, '¡',    NCHAR(161))
UPDATE Items SET Name = REPLACE(Name, '¢',     NCHAR(162))
UPDATE Items SET Name = REPLACE(Name, '£',    NCHAR(163))
UPDATE Items SET Name = REPLACE(Name, '¤',   NCHAR(164))
UPDATE Items SET Name = REPLACE(Name, '¥',      NCHAR(165))
UPDATE Items SET Name = REPLACE(Name, '¦',   NCHAR(166))
UPDATE Items SET Name = REPLACE(Name, '§',     NCHAR(167))
UPDATE Items SET Name = REPLACE(Name, '¨',      NCHAR(168))
UPDATE Items SET Name = REPLACE(Name, '©',     NCHAR(169))
UPDATE Items SET Name = REPLACE(Name, 'ª',     NCHAR(170))
UPDATE Items SET Name = REPLACE(Name, '«',    NCHAR(171))
UPDATE Items SET Name = REPLACE(Name, '¬',      NCHAR(172))
UPDATE Items SET Name = REPLACE(Name, '­',      NCHAR(173))
UPDATE Items SET Name = REPLACE(Name, '®',      NCHAR(174))
UPDATE Items SET Name = REPLACE(Name, '¯',     NCHAR(175))
UPDATE Items SET Name = REPLACE(Name, '°',      NCHAR(176))
UPDATE Items SET Name = REPLACE(Name, '±',   NCHAR(177))
UPDATE Items SET Name = REPLACE(Name, '²',     NCHAR(178))
UPDATE Items SET Name = REPLACE(Name, '³',     NCHAR(179))
UPDATE Items SET Name = REPLACE(Name, '´',    NCHAR(180))
UPDATE Items SET Name = REPLACE(Name, 'µ',    NCHAR(181))
UPDATE Items SET Name = REPLACE(Name, '¶',     NCHAR(182))
UPDATE Items SET Name = REPLACE(Name, '¸',    NCHAR(184))
UPDATE Items SET Name = REPLACE(Name, '¹',     NCHAR(185))
UPDATE Items SET Name = REPLACE(Name, 'º',     NCHAR(186))
UPDATE Items SET Name = REPLACE(Name, '»',    NCHAR(187))
UPDATE Items SET Name = REPLACE(Name, '¼',   NCHAR(188))
UPDATE Items SET Name = REPLACE(Name, '½',   NCHAR(189))
UPDATE Items SET Name = REPLACE(Name, '¾',   NCHAR(190))
UPDATE Items SET Name = REPLACE(Name, '¿',   NCHAR(191))
UPDATE Items SET Name = REPLACE(Name, '×',    NCHAR(215))
UPDATE Items SET Name = REPLACE(Name, '÷',   NCHAR(247))
UPDATE Items SET Name = REPLACE(Name, '∀',   NCHAR(8704))
UPDATE Items SET Name = REPLACE(Name, '∂',     NCHAR(8706))
UPDATE Items SET Name = REPLACE(Name, '∃',    NCHAR(8707))
UPDATE Items SET Name = REPLACE(Name, '∅',    NCHAR(8709))
UPDATE Items SET Name = REPLACE(Name, '∇',    NCHAR(8711))
UPDATE Items SET Name = REPLACE(Name, '∈',     NCHAR(8712))
UPDATE Items SET Name = REPLACE(Name, '∉',    NCHAR(8713))
UPDATE Items SET Name = REPLACE(Name, '∋',       NCHAR(8715))
UPDATE Items SET Name = REPLACE(Name, '∏',     NCHAR(8719))
UPDATE Items SET Name = REPLACE(Name, '∑',      NCHAR(8721))
UPDATE Items SET Name = REPLACE(Name, '−',    NCHAR(8722))
UPDATE Items SET Name = REPLACE(Name, '∗',   NCHAR(8727))
UPDATE Items SET Name = REPLACE(Name, '√',    NCHAR(8730))
UPDATE Items SET Name = REPLACE(Name, '∝',     NCHAR(8733))
UPDATE Items SET Name = REPLACE(Name, '∞',    NCHAR(8734))
UPDATE Items SET Name = REPLACE(Name, '∠',      NCHAR(8736))
UPDATE Items SET Name = REPLACE(Name, '∧',      NCHAR(8743))
UPDATE Items SET Name = REPLACE(Name, '∨',       NCHAR(8744))
UPDATE Items SET Name = REPLACE(Name, '∩',      NCHAR(8745))
UPDATE Items SET Name = REPLACE(Name, '∪',      NCHAR(8746))
UPDATE Items SET Name = REPLACE(Name, '∫',      NCHAR(8747))
UPDATE Items SET Name = REPLACE(Name, '∴',   NCHAR(8756))
UPDATE Items SET Name = REPLACE(Name, '∼',      NCHAR(8764))
UPDATE Items SET Name = REPLACE(Name, '≅',     NCHAR(8773))
UPDATE Items SET Name = REPLACE(Name, '≈',    NCHAR(8776))
UPDATE Items SET Name = REPLACE(Name, '≠',       NCHAR(8800))
UPDATE Items SET Name = REPLACE(Name, '≡',    NCHAR(8801))
UPDATE Items SET Name = REPLACE(Name, '≤',       NCHAR(8804))
UPDATE Items SET Name = REPLACE(Name, '≥',       NCHAR(8805))
UPDATE Items SET Name = REPLACE(Name, '⊂',      NCHAR(8834))
UPDATE Items SET Name = REPLACE(Name, '⊃',      NCHAR(8835))
UPDATE Items SET Name = REPLACE(Name, '⊄',     NCHAR(8836))
UPDATE Items SET Name = REPLACE(Name, '⊆',     NCHAR(8838))
UPDATE Items SET Name = REPLACE(Name, '⊇',     NCHAR(8839))
UPDATE Items SET Name = REPLACE(Name, '⊕',    NCHAR(8853))
UPDATE Items SET Name = REPLACE(Name, '⊗',   NCHAR(8855))
UPDATE Items SET Name = REPLACE(Name, '⊥',     NCHAR(8869))
UPDATE Items SET Name = REPLACE(Name, '⋅',     NCHAR(8901))
UPDATE Items SET Name = REPLACE(Name, 'Α',    NCHAR(913))
UPDATE Items SET Name = REPLACE(Name, 'Β',     NCHAR(914))
UPDATE Items SET Name = REPLACE(Name, 'Γ',    NCHAR(915))
UPDATE Items SET Name = REPLACE(Name, 'Δ',    NCHAR(916))
UPDATE Items SET Name = REPLACE(Name, 'Ε',  NCHAR(917))
UPDATE Items SET Name = REPLACE(Name, 'Ζ',     NCHAR(918))
UPDATE Items SET Name = REPLACE(Name, 'Η',      NCHAR(919))
UPDATE Items SET Name = REPLACE(Name, 'Θ',    NCHAR(920))
UPDATE Items SET Name = REPLACE(Name, 'Ι',     NCHAR(921))
UPDATE Items SET Name = REPLACE(Name, 'Κ',    NCHAR(922))
UPDATE Items SET Name = REPLACE(Name, 'Λ',   NCHAR(923))
UPDATE Items SET Name = REPLACE(Name, 'Μ',       NCHAR(924))
UPDATE Items SET Name = REPLACE(Name, 'Ν',       NCHAR(925))
UPDATE Items SET Name = REPLACE(Name, 'Ξ',       NCHAR(926))
UPDATE Items SET Name = REPLACE(Name, 'Ο',  NCHAR(927))
UPDATE Items SET Name = REPLACE(Name, 'Π',       NCHAR(928))
UPDATE Items SET Name = REPLACE(Name, 'Ρ',      NCHAR(929))
UPDATE Items SET Name = REPLACE(Name, 'Σ',    NCHAR(931))
UPDATE Items SET Name = REPLACE(Name, 'Τ',      NCHAR(932))
UPDATE Items SET Name = REPLACE(Name, 'Υ',  NCHAR(933))
UPDATE Items SET Name = REPLACE(Name, 'Φ',      NCHAR(934))
UPDATE Items SET Name = REPLACE(Name, 'Χ',      NCHAR(935))
UPDATE Items SET Name = REPLACE(Name, 'Ψ',      NCHAR(936))
UPDATE Items SET Name = REPLACE(Name, 'Ω',    NCHAR(937))
UPDATE Items SET Name = REPLACE(Name, 'α',    NCHAR(945))
UPDATE Items SET Name = REPLACE(Name, 'β',     NCHAR(946))
UPDATE Items SET Name = REPLACE(Name, 'γ',    NCHAR(947))
UPDATE Items SET Name = REPLACE(Name, 'δ',    NCHAR(948))
UPDATE Items SET Name = REPLACE(Name, 'ε',  NCHAR(949))
UPDATE Items SET Name = REPLACE(Name, 'ζ',     NCHAR(950))
UPDATE Items SET Name = REPLACE(Name, 'η',      NCHAR(951))
UPDATE Items SET Name = REPLACE(Name, 'θ',    NCHAR(952))
UPDATE Items SET Name = REPLACE(Name, 'ι',     NCHAR(953))
UPDATE Items SET Name = REPLACE(Name, 'κ',    NCHAR(954))
UPDATE Items SET Name = REPLACE(Name, 'λ',   NCHAR(955))
UPDATE Items SET Name = REPLACE(Name, 'μ',       NCHAR(956))
UPDATE Items SET Name = REPLACE(Name, 'ν',       NCHAR(957))
UPDATE Items SET Name = REPLACE(Name, 'ξ',       NCHAR(958))
UPDATE Items SET Name = REPLACE(Name, 'ο',  NCHAR(959))
UPDATE Items SET Name = REPLACE(Name, 'π',       NCHAR(960))
UPDATE Items SET Name = REPLACE(Name, 'ρ',      NCHAR(961))
UPDATE Items SET Name = REPLACE(Name, 'ς',   NCHAR(962))
UPDATE Items SET Name = REPLACE(Name, 'σ',    NCHAR(963))
UPDATE Items SET Name = REPLACE(Name, 'τ',      NCHAR(964))
UPDATE Items SET Name = REPLACE(Name, 'υ',  NCHAR(965))
UPDATE Items SET Name = REPLACE(Name, 'φ',      NCHAR(966))
UPDATE Items SET Name = REPLACE(Name, 'χ',      NCHAR(967))
UPDATE Items SET Name = REPLACE(Name, 'ψ',      NCHAR(968))
UPDATE Items SET Name = REPLACE(Name, 'ω',    NCHAR(969))
UPDATE Items SET Name = REPLACE(Name, 'ϑ', NCHAR(977))
UPDATE Items SET Name = REPLACE(Name, 'ϒ',    NCHAR(978))
UPDATE Items SET Name = REPLACE(Name, 'ϖ',      NCHAR(982))
UPDATE Items SET Name = REPLACE(Name, 'Œ',    NCHAR(338))
UPDATE Items SET Name = REPLACE(Name, 'œ',    NCHAR(339))
UPDATE Items SET Name = REPLACE(Name, 'Š',   NCHAR(352))
UPDATE Items SET Name = REPLACE(Name, 'š',   NCHAR(353))
UPDATE Items SET Name = REPLACE(Name, 'Ÿ',     NCHAR(376))
UPDATE Items SET Name = REPLACE(Name, 'ƒ',     NCHAR(402))
UPDATE Items SET Name = REPLACE(Name, 'ˆ',     NCHAR(710))
UPDATE Items SET Name = REPLACE(Name, '˜',    NCHAR(732))
UPDATE Items SET Name = REPLACE(Name, ' ',     NCHAR(8194))
UPDATE Items SET Name = REPLACE(Name, ' ',     NCHAR(8195))
UPDATE Items SET Name = REPLACE(Name, ' ',   NCHAR(8201))
UPDATE Items SET Name = REPLACE(Name, '‌',     NCHAR(8204))
UPDATE Items SET Name = REPLACE(Name, '‍',      NCHAR(8205))
UPDATE Items SET Name = REPLACE(Name, '‎',      NCHAR(8206))
UPDATE Items SET Name = REPLACE(Name, '‏',      NCHAR(8207))
UPDATE Items SET Name = REPLACE(Name, '–',    NCHAR(8211))
UPDATE Items SET Name = REPLACE(Name, '—',    NCHAR(8212))
UPDATE Items SET Name = REPLACE(Name, '‘',    NCHAR(8216))
UPDATE Items SET Name = REPLACE(Name, '’',    NCHAR(8217))
UPDATE Items SET Name = REPLACE(Name, '‚',    NCHAR(8218))
UPDATE Items SET Name = REPLACE(Name, '“',    NCHAR(8220))
UPDATE Items SET Name = REPLACE(Name, '”',    NCHAR(8221))
UPDATE Items SET Name = REPLACE(Name, '„',    NCHAR(8222))
UPDATE Items SET Name = REPLACE(Name, '†',   NCHAR(8224))
UPDATE Items SET Name = REPLACE(Name, '‡',   NCHAR(8225))
UPDATE Items SET Name = REPLACE(Name, '•',     NCHAR(8226))
UPDATE Items SET Name = REPLACE(Name, '…',   NCHAR(8230))
UPDATE Items SET Name = REPLACE(Name, '‰',   NCHAR(8240))
UPDATE Items SET Name = REPLACE(Name, '′',    NCHAR(8242))
UPDATE Items SET Name = REPLACE(Name, '″',    NCHAR(8243))
UPDATE Items SET Name = REPLACE(Name, '‹',   NCHAR(8249))
UPDATE Items SET Name = REPLACE(Name, '›',   NCHAR(8250))
UPDATE Items SET Name = REPLACE(Name, '‾',    NCHAR(8254))
UPDATE Items SET Name = REPLACE(Name, '€',     NCHAR(8364))
UPDATE Items SET Name = REPLACE(Name, '™',    NCHAR(8482))
UPDATE Items SET Name = REPLACE(Name, '←',     NCHAR(8592))
UPDATE Items SET Name = REPLACE(Name, '↑',     NCHAR(8593))
UPDATE Items SET Name = REPLACE(Name, '→',     NCHAR(8594))
UPDATE Items SET Name = REPLACE(Name, '↓',     NCHAR(8595))
UPDATE Items SET Name = REPLACE(Name, '↔',     NCHAR(8596))
UPDATE Items SET Name = REPLACE(Name, '↵',    NCHAR(8629))
UPDATE Items SET Name = REPLACE(Name, '⌈',    NCHAR(8968))
UPDATE Items SET Name = REPLACE(Name, '⌉',    NCHAR(8969))
UPDATE Items SET Name = REPLACE(Name, '⌊',   NCHAR(8970))
UPDATE Items SET Name = REPLACE(Name, '⌋',   NCHAR(8971))
UPDATE Items SET Name = REPLACE(Name, '◊',      NCHAR(9674))
UPDATE Items SET Name = REPLACE(Name, '♠',   NCHAR(9824))
UPDATE Items SET Name = REPLACE(Name, '♣',    NCHAR(9827))
UPDATE Items SET Name = REPLACE(Name, '♥',   NCHAR(9829))
UPDATE Items SET Name = REPLACE(Name, '♦',    NCHAR(9830))