{"id":200131,"date":"2025-05-06T12:24:01","date_gmt":"2025-05-06T04:24:01","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200131\/"},"modified":"2025-05-06T12:24:01","modified_gmt":"2025-05-06T04:24:01","slug":"%e4%b8%ba%e4%bb%80%e4%b9%88%e6%88%91%e9%87%8d%e6%96%b0%e5%ae%a1%e8%a7%86-ms-sql-server-%e5%9f%ba%e7%a1%80%e7%9f%a5%e8%af%86%ef%bc%9a%e6%b7%b1%e5%85%a5%e6%8e%a2%e8%ae%a8%e5%ad%97%e7%ac%a6%e4%b8%b2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200131\/","title":{"rendered":"\u4e3a\u4ec0\u4e48\u6211\u91cd\u65b0\u5ba1\u89c6 MS SQL Server \u57fa\u7840\u77e5\u8bc6\uff1a\u6df1\u5165\u63a2\u8ba8\u5b57\u7b26\u4e32\u6570\u636e\u7c7b\u578b"},"content":{"rendered":"

<\/b> <\/p>\n

\u4e3a\u4ec0\u4e48\u6211\u91cd\u65b0\u5ba1\u89c6 MS SQL Server \u57fa\u7840\u77e5\u8bc6\uff1a\u6df1\u5165\u63a2\u8ba8\u5b57\u7b26\u4e32\u6570\u636e\u7c7b\u578b<\/h1>\n

\u7f16\u7a0b\u5e76\u4e0d\u662f\u4e00\u4e2a\u673a\u68b0\u6027\u7684\u5de5\u4f5c\uff0c\u800c\u662f\u9700\u8981\u6709\u601d\u8003\uff0c\u6709\u521b\u65b0\u7684\u5de5\u4f5c\uff0c\u8bed\u6cd5\u662f\u56fa\u5b9a\u7684\uff0c\u4f46\u89e3\u51b3\u95ee\u9898\u7684\u601d\u8def\u5219\u662f\u4f9d\u9760\u4eba\u7684\u601d\u7ef4\uff0c\u8fd9\u5c31\u9700\u8981\u6211\u4eec\u575a\u6301\u5b66\u4e60\u548c\u66f4\u65b0\u81ea\u5df1\u7684\u77e5\u8bc6\u3002\u4eca\u5929\u4e3b\u673a\u5b9d\u8d1d\u5c31\u6574\u7406\u5206\u4eab\u300a\u4e3a\u4ec0\u4e48\u6211\u91cd\u65b0\u5ba1\u89c6 MS SQL Server \u57fa\u7840\u77e5\u8bc6\uff1a\u6df1\u5165\u63a2\u8ba8\u5b57\u7b26\u4e32\u6570\u636e\u7c7b\u578b\u300b\uff0c\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec\uff0c\u5982\u679c\u4f60\u5bf9\u6570\u636e\u5e93\u65b9\u9762\u7684\u77e5\u8bc6\u70b9\u611f\u5174\u8da3\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\u4e3b\u673a\u5b9d\u8d1d\uff0c\u5728\u8fd9\u53ef\u4ee5\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5f00\u53d1\u80fd\u529b\u7684\u63d0\u5347\u3002<\/p>\n

\u4eca\u5929\uff0c\u5f53\u6211\u5411\u7ecf\u7406\u63d0\u51fa\u516c\u5173\uff08\u662f\u5173\u4e8e\u5546\u5e97\u6d41\u7a0b\uff09\u65f6\uff0c\u6211\u7684\u7ecf\u7406\u95ee\u4e86\u6211\u51e0\u4e2a\u95ee\u9898\u3002<\/p>\n

\u6bd4\u5982\uff0c\u4e3a\u4ec0\u4e48\u5c06 string \u7684\u6570\u636e\u7c7b\u578b\u58f0\u660e\u4e3a varchar(n) \u800c\u4e0d\u662f nvarchar(n) \u7b49\u57fa\u4e8e\u573a\u666f\u7684\u95ee\u9898\uff1f<\/p>\n

\u60a8\u53ef\u80fd\u4e5f\u9047\u5230\u8fc7\u4e0e\u5b66\u957f\u6216\u5927\u5b66\u8001\u5e08\u7c7b\u4f3c\u7684\u60c5\u51b5\u3002<\/p>\n

\u867d\u7136\u6211\u7ed9\u4e86\u4ed6\u7b54\u6848\uff0c\u4f46\u8fd9\u573a\u8fa9\u8bba\u5bf9\u6211\u7684\u57fa\u7840\u77e5\u8bc6\u63d0\u51fa\u4e86\u7591\u95ee\u3002 <\/p>\n

\u6211\u51b3\u5b9a\u4ece\u5934\u5f00\u59cb\u4fee\u6539\u3002<\/p>\n

\u5728\u4fee\u6539\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6211\u6ce8\u610f\u5230\u4e86\u51e0\u70b9\uff0c\u60f3\u548c\u5927\u5bb6\u5206\u4eab\uff0c\u6240\u4ee5\u5199\u4e86\u8fd9\u7bc7\u6587\u7ae0\u3002<\/p>\n

<\/p>\n

\u8ba9\u6211\u4eec\u4ece\u5934\u5f00\u59cb\u5427\u3002 <\/h2>\n

\u5f53\u6211\u4eec\u521b\u5efa\u6570\u636e\u5e93\u65f6\uff0c\u4f1a\u5728\u540e\u53f0\u751f\u6210 2 \u4e2a\u6587\u4ef6\u3002<\/p>\n

    \n
  1. \u6570\u636e\u6587\u4ef6\uff1a<\/strong> \u8be5\u6587\u4ef6\u5177\u6709 (.mdf) \u6269\u5c55\u540d\uff0c\u79f0\u4e3a\u4e3b\u6570\u636e\u6587\u4ef6\u3002<\/li>\n
  2. \u65e5\u5fd7\u6587\u4ef6\uff1a<\/strong> \u8be5\u6587\u4ef6\u5177\u6709 (.ldf) \u6269\u5c55\u540d\uff0c\u79f0\u4e3a\u4e8b\u52a1\u65e5\u5fd7\u6587\u4ef6\u3002<\/li>\n<\/ol>\n

    \u5c3d\u7ba1\u5982\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u914d\u7f6e\u5e94\u751f\u6210\u591a\u5c11\u4e2a\u6587\u4ef6\u3002\u5982\u679c\u6211\u4eec\u914d\u7f6e\u8d85\u8fc7 2 \u4e2a\u6587\u4ef6\uff0c\u5219\u6709\u7b2c\u4e09\u4e2a\u7c7b\u522b\uff1a<\/p>\n

      \n
    • \u7528\u6237\u5b9a\u4e49\u6587\u4ef6<\/strong>\uff1a\u4ee5\u53ca\u90a3\u4e9b\u6269\u5c55\u540d\u4e3a\uff08.ndf\uff09\u7684\u8f85\u52a9\u6570\u636e\u6587\u4ef6<\/li>\n<\/ul>\n

      \u6bcf\u5f53\u6211\u4eec\u6267\u884c\u4efb\u4f55\u6570\u636e\u5e93\u4e8b\u52a1\u65f6\uff0c\u5b83\u90fd\u4f1a\u9996\u5148\u5b58\u50a8\u5728\u65e5\u5fd7\u6587\u4ef6\u4e2d\uff0c\u4e00\u65e6\u4e8b\u52a1\u5b8c\u6210\uff0c\u5b83\u5c31\u4f1a\u66f4\u65b0\u5230\u4e3b\u6570\u636e\u6587\u4ef6\u4e2d\u3002<\/p>\n

      \u6bcf\u4e2a\u6587\u4ef6\u7684\u9ed8\u8ba4\u5927\u5c0f\u6700\u5c0f\u4e3a 8 MB\uff0c\u6700\u5927\u6ca1\u6709\u9650\u5236\u3002\u800c\u6570\u636e\u5e93\u65b9\u9762\uff0c\u6839\u636e\u5fae\u8f6f\u7684\u8bf4\u6cd5\uff0c\u4e00\u4e2a\u6570\u636e\u5e93\u6700\u5927\u53ef\u8fbe524PB\u3002<\/p>\n

      \u9009\u62e9\u4e0e\u6253\u5370\u67e5\u8be2 <\/h2>\n

      \u5982\u679c\u60a8\u4f7f\u7528\u8fc7\u201c\u9009\u62e9\u201d\u67e5\u8be2\uff0c\u60a8\u53ef\u80fd\u4e5f\u542c\u8bf4\u8fc7\u201c\u6253\u5370\u201d\u67e5\u8be2\u3002<\/p>\n

      \u8ba9\u6211\u4eec\u4e86\u89e3\u4f55\u65f6\u4f7f\u7528\u54ea\u4e2a\u3002<\/strong><\/p>\n

      \u57fa\u672c\u4e0a\uff0c\u201c\u9009\u62e9\u201d\u67e5\u8be2\u4ee5\u7f51\u683c\u683c\u5f0f\u8fd4\u56de\u8868\u6570\u636e\uff0c\u800c\u201c\u6253\u5370\u201d\u67e5\u8be2\u4ee5\u6587\u672c\u5f62\u5f0f\u8fd4\u56de\u6570\u636e\u3002<\/p>\n

      \u56e0\u6b64\uff0c\u6bcf\u5f53\u6211\u4eec\u9700\u8981\u5bf9\u8868\u6570\u636e\u6267\u884c\u64cd\u4f5c\u65f6\uff0c\u6211\u4eec\u90fd\u4f1a\u4f7f\u7528\u201cselect\u201d\u67e5\u8be2\uff0c\u5e76\u4e14\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u8981\u6253\u5370\u65e5\u5fd7\u6216\u9519\u8bef\uff0c\u6211\u4eec\u4f1a\u4f7f\u7528\u201cprint\u201d\u67e5\u8be2\u3002<\/p>\n

      \u73b0\u5728\uff0c\u8ba9\u6211\u4eec\u6765\u8ba8\u8bba\u4e00\u4e0b\u6700\u559c\u6b22\u7684\u9762\u8bd5\u95ee\u9898\u3002 <\/p>\n

      <\/p>\n

      Char\u3001Varchar\u3001Nvarchar\uff1f <\/h2>\n

      \u89d2\u8272\uff1a<\/strong><\/p>\n

      \u5b57\u7b26\u5b58\u50a8\u6700\u591a 8000<\/strong> \u4e2a\u5b57\u7b26\uff0c\u6bcf\u4e2a\u5b57\u7b26\u7a7a\u95f4\u5bb9\u7eb3 1 \u4e2a\u5b57\u8282\u3002 <\/p>\n

        \n
      • \n

        \u5982\u679c\u6211\u4eec\u4e0d\u6307\u5b9a\u5927\u5c0f\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b SQL \u4f1a\u4e3a\u5176\u5206\u914d 1 \u4e2a\u5b57\u8282\u5e76\u4ec5\u4fdd\u5b58\u4e00\u4e2a\u5b57\u7b26\u3002<\/p>\n<\/li>\n

      • \n

        \u5982\u679c\u6211\u4eec\u63d0\u4f9b\u7684\u8f93\u5165\u591a\u4e8e\u5b9a\u4e49\u7684\u5927\u5c0f\uff0c\u5b83\u4f1a\u81ea\u52a8\u622a\u65ad\u6570\u636e\u3002<\/p>\n<\/li>\n

      • \n

        Char \u9075\u5faa\u9759\u6001\u5185\u5b58\u5206\u914d<\/strong>\uff0c\u56e0\u6b64\u5982\u679c\u6211\u4eec\u5206\u914d 20 \u5b57\u8282\u5927\u5c0f\u5e76\u5b58\u50a8 10 \u4e2a\u5b57\u7b26\uff0cSQL \u4ecd\u4f1a\u5206\u914d\u6240\u6709 20 \u5b57\u8282\u5b58\u50a8\uff0c\u5269\u4f59 10 \u5b57\u8282\u5c06\u88ab\u89c6\u4e3a\u6d6a\u8d39\u7a7a\u95f4\u3002<\/p>\n<\/li>\n<\/ul>\n

        Varchar\uff1a<\/strong><\/p>\n

          \n
        • \n

          Varchar \u53ef\u4ee5\u5b58\u50a8\u6700\u5927 2GB<\/strong> \u6570\u636e\uff0c\u6bcf\u4e2a\u5b57\u7b26\u7a7a\u95f4\u5bb9\u7eb3 1 \u4e2a\u5b57\u8282\u3002\u5c3d\u7ba1\u5b83\u5728\u8868\u4e2d\u5b58\u50a8\u6700\u591a 8000 \u5b57\u8282<\/strong> \u6570\u636e\uff0c\u4f46\u8d85\u51fa\u7684\u4efb\u4f55\u5185\u5bb9\u90fd\u4f1a\u5b58\u50a8\u5728\u6587\u672c\u6587\u4ef6\u4e2d\u3002<\/p>\n<\/li>\n

        • \n

          \u6240\u4ee5\u60a8\u53ef\u80fd\u5df2\u7ecf\u5728\u591a\u7bc7\u6587\u7ae0\u4e2d\u6ce8\u610f\u5230\u5176\u9650\u5236\u4e3a 8000 \u5b57\u8282\u3002<\/p>\n<\/li>\n

        • \n

          \u8981\u58f0\u660e\u4e00\u4e2a\u5217\u6765\u5b58\u50a8 2GB \u6570\u636e\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 varchar(max)\u3002<\/p>\n<\/li>\n

        • \n

          Varchar \u9075\u5faa\u52a8\u6001\u5185\u5b58\u5206\u914d<\/strong>\u3002\u56e0\u6b64\uff0c\u5982\u679c\u6211\u4eec\u5206\u914d 20 \u5b57\u8282\u5927\u5c0f\u5e76\u5b58\u50a8 10 \u4e2a\u5b57\u7b26\uff0cSQL \u5c06\u4ec5\u5206\u914d 10 \u5b57\u8282\u5b58\u50a8\uff0c\u5176\u4f59 10 \u5b57\u8282\u5c06\u88ab\u4fdd\u5b58\u3002<\/p>\n<\/li>\n<\/ul>\n

          Nvarchar\uff1a<\/strong><\/p>\n

            \n
          • \n

            Nvarchar \u4e0e varchar \u5177\u6709\u76f8\u540c\u7684\u5c5e\u6027\uff0c\u552f\u4e00\u7684\u533a\u522b\u662f\u5b83\u4f7f\u7528 2 \u4e2a\u5b57\u8282\u6765\u5b58\u50a8\u4e00\u4e2a\u5b57\u7b26\u3002<\/p>\n<\/li>\n

          • \n

            \u56e0\u4e3a\u5b83\u9075\u5faaUnicode\u6807\u51c6\u6570\u636e\uff0c\u6240\u4ee5\u652f\u6301\u591a\u79cd\u8bed\u8a00\u3002
            \u800cchar\u3001varchar\u9075\u5faaASCCI\u6807\u51c6\u6570\u636e\u3002<\/p>\n<\/li>\n<\/ul>\n

            \u8fd8\u6709\u4e00\u79cd\u540d\u4e3a Text<\/strong> \u7684\u6570\u636e\u7c7b\u578b\uff0c\u4f46\u5b83\u5df2\u88ab\u5f03\u7528\uff0c\u56e0\u6b64\u60a8\u53ef\u4ee5\u5ffd\u7565\u5b83\u3002<\/em><\/p>\n

            \u6709\u4e00\u7bc7\u6587\u7ae0\u6211\u5728\u7814\u7a76\u8fc7\u7a0b\u4e2d\u53d1\u73b0\u975e\u5e38\u6709\u7528\u3002\u5b83\u5305\u542b\u6709\u5173\u6240\u6709\u6570\u636e\u7c7b\u578b\u7684\u8be6\u7ec6\u4fe1\u606f\u3002<\/p>\n

            \u60a8\u53ef\u4ee5\u6d4f\u89c8\u5b83\u4ee5\u83b7\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n

            \u5982\u679c\u60a8\u8ba4\u4e3a\u6211\u9057\u6f0f\u4e86\u67d0\u4e9b\u5185\u5bb9\u6216\u9700\u8981\u66f4\u65b0\uff0c\u8bf7\u968f\u65f6\u53d1\u8868\u8bc4\u8bba\u3002\u8fd9\u5c06\u5bf9\u6211\u4ee5\u53ca\u6211\u4eec\u7684\u793e\u533a\u6709\u6240\u5e2e\u52a9\u3002<\/em><\/p>\n

            \u4eca\u5929\u5173\u4e8e\u300a\u4e3a\u4ec0\u4e48\u6211\u91cd\u65b0\u5ba1\u89c6 MS SQL Server \u57fa\u7840\u77e5\u8bc6\uff1a\u6df1\u5165\u63a2\u8ba8\u5b57\u7b26\u4e32\u6570\u636e\u7c7b\u578b\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff01<\/p>\n

            \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1adev.to \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb \u5220\u9664 <\/p>\n

            \n
            \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"

            \u4e3a\u4ec0\u4e48\u6211\u91cd\u65b0\u5ba1\u89c6 MS SQL ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-200131","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200131","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=200131"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200131\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200131"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200131"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200131"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}