{"id":154599,"date":"2024-11-02T17:09:23","date_gmt":"2024-11-02T09:09:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/154599\/"},"modified":"2024-11-02T17:09:24","modified_gmt":"2024-11-02T09:09:24","slug":"%e5%b0%8d-sql-server-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%98%93%e6%b7%b7%e6%b7%86%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e7%9a%84%e6%8f%8f%e8%bf%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/154599\/","title":{"rendered":"\u5c0d SQL Server \u6578\u64da\u5eab\u6613\u6df7\u6dc6\u7684\u6578\u64da\u985e\u578b\u7684\u63cf\u8ff0"},"content":{"rendered":"<h1 id=\"%e5%b0%8d-sql-server-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%98%93%e6%b7%b7%e6%b7%86%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e7%9a%84%e6%8f%8f%e8%bf%b0-hHegsiMwhG\">\u5c0d SQL Server \u6578\u64da\u5eab\u6613\u6df7\u6dc6\u7684\u6578\u64da\u985e\u578b\u7684\u63cf\u8ff0<\/h1>\n<p>\u5728\u4f7f\u7528 SQL Server \u6578\u64da\u5eab\u6642\uff0c\u9078\u64c7\u6b63\u78ba\u7684\u6578\u64da\u985e\u578b\u5c0d\u65bc\u6578\u64da\u7684\u5b58\u5132\u548c\u8655\u7406\u81f3\u95dc\u91cd\u8981\u3002SQL Server \u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u985e\u578b\uff0c\u9019\u4e9b\u985e\u578b\u5404\u6709\u7279\u9ede\uff0c\u5bb9\u6613\u8b93\u521d\u5b78\u8005\u611f\u5230\u56f0\u60d1\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u4e00\u4e9b\u5e38\u898b\u7684\u6613\u6df7\u6dc6\u6578\u64da\u985e\u578b\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5b83\u5011\u7684\u7528\u9014\u548c\u5dee\u7570\u3002<\/p>\n<h2 id=\"1-%e6%95%b4%e6%95%b8%e9%a1%9e%e5%9e%8b%ef%bc%9aint%e3%80%81bigint%e3%80%81smallint-%e5%92%8c-tinyint-hHegsiMwhG\">1. \u6574\u6578\u985e\u578b\uff1aINT\u3001BIGINT\u3001SMALLINT \u548c TINYINT<\/h2>\n<p>\u6574\u6578\u985e\u578b\u662f SQL Server \u4e2d\u6700\u5e38\u7528\u7684\u6578\u64da\u985e\u578b\u4e4b\u4e00\u3002\u5b83\u5011\u7684\u4e3b\u8981\u5340\u5225\u5728\u65bc\u53ef\u5b58\u5132\u7684\u6578\u503c\u7bc4\u570d\u548c\u6240\u9700\u7684\u5b58\u5132\u7a7a\u9593\uff1a<\/p>\n<ul>\n<li><strong>TINYINT<\/strong>: \u4f54\u7528 1 \u5b57\u7bc0\uff0c\u7bc4\u570d\u5f9e 0 \u5230 255\u3002<\/li>\n<li><strong>SMALLINT<\/strong>: \u4f54\u7528 2 \u5b57\u7bc0\uff0c\u7bc4\u570d\u5f9e -32,768 \u5230 32,767\u3002<\/li>\n<li><strong>INT<\/strong>: \u4f54\u7528 4 \u5b57\u7bc0\uff0c\u7bc4\u570d\u5f9e -2,147,483,648 \u5230 2,147,483,647\u3002<\/li>\n<li><strong>BIGINT<\/strong>: \u4f54\u7528 8 \u5b57\u7bc0\uff0c\u7bc4\u570d\u5f9e -9,223,372,036,854,775,808 \u5230 9,223,372,036,854,775,807\u3002<\/li>\n<\/ul>\n<p>\u9078\u64c7\u5408\u9069\u7684\u6574\u6578\u985e\u578b\u53ef\u4ee5\u6709\u6548\u5730\u7bc0\u7701\u5b58\u5132\u7a7a\u9593\u3002\u4f8b\u5982\uff0c\u5982\u679c\u53ea\u9700\u8981\u5b58\u5132 0 \u5230 100 \u7684\u6578\u5b57\uff0c\u4f7f\u7528 TINYINT \u6703\u6bd4\u4f7f\u7528 INT \u66f4\u52a0\u9ad8\u6548\u3002<\/p>\n<h2 id=\"2-%e6%b5%ae%e9%bb%9e%e6%95%b8%e9%a1%9e%e5%9e%8b%ef%bc%9afloat-%e5%92%8c-real-hHegsiMwhG\">2. \u6d6e\u9ede\u6578\u985e\u578b\uff1aFLOAT \u548c REAL<\/h2>\n<p>\u5728\u8655\u7406\u5e36\u5c0f\u6578\u7684\u6578\u5b57\u6642\uff0cSQL Server \u63d0\u4f9b\u4e86 FLOAT \u548c REAL \u5169\u7a2e\u6578\u64da\u985e\u578b\u3002\u9019\u5169\u8005\u7684\u4e3b\u8981\u5340\u5225\u5728\u65bc\u7cbe\u5ea6\uff1a<\/p>\n<ul>\n<li><strong>REAL<\/strong>: \u4f54\u7528 4 \u5b57\u7bc0\uff0c\u7cbe\u5ea6\u7d04\u70ba 7 \u4f4d\u5341\u9032\u5236\u6578\u3002<\/li>\n<li><strong>FLOAT<\/strong>: \u4f54\u7528 8 \u5b57\u7bc0\uff0c\u7cbe\u5ea6\u53ef\u9054 15 \u4f4d\u5341\u9032\u5236\u6578\uff0c\u5177\u9ad4\u7cbe\u5ea6\u53d6\u6c7a\u65bc\u5b9a\u7fa9\u6642\u7684\u53c3\u6578\u3002<\/li>\n<\/ul>\n<p>\u5728\u9078\u64c7\u9019\u5169\u7a2e\u6578\u64da\u985e\u578b\u6642\uff0c\u61c9\u6839\u64da\u6240\u9700\u7684\u7cbe\u5ea6\u4f86\u6c7a\u5b9a\u3002\u5982\u679c\u9700\u8981\u66f4\u9ad8\u7684\u7cbe\u5ea6\uff0c\u5247\u61c9\u9078\u64c7 FLOAT\uff1b\u5982\u679c\u7cbe\u5ea6\u8981\u6c42\u4e0d\u9ad8\uff0c\u5247\u53ef\u4ee5\u9078\u64c7 REAL\u3002<\/p>\n<h2 id=\"3-%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%a1%9e%e5%9e%8b%ef%bc%9achar%e3%80%81varchar-%e5%92%8c-nvarchar-hHegsiMwhG\">3. \u5b57\u7b26\u4e32\u985e\u578b\uff1aCHAR\u3001VARCHAR \u548c NVARCHAR<\/h2>\n<p>\u5b57\u7b26\u4e32\u985e\u578b\u5728 SQL Server \u4e2d\u4e5f\u975e\u5e38\u5e38\u898b\u3002CHAR \u548c VARCHAR \u7528\u65bc\u5b58\u5132\u975e Unicode \u5b57\u7b26\uff0c\u800c NVARCHAR \u7528\u65bc\u5b58\u5132 Unicode \u5b57\u7b26\u3002\u5b83\u5011\u7684\u4e3b\u8981\u5340\u5225\u5728\u65bc\u5b58\u5132\u65b9\u5f0f\u548c\u5b57\u7b26\u96c6\uff1a<\/p>\n<ul>\n<li><strong>CHAR<\/strong>: \u56fa\u5b9a\u9577\u5ea6\uff0c\u4f54\u7528\u7684\u5b57\u7bc0\u6578\u7b49\u65bc\u5b9a\u7fa9\u7684\u9577\u5ea6\u3002<\/li>\n<li><strong>VARCHAR<\/strong>: \u53ef\u8b8a\u9577\u5ea6\uff0c\u4f54\u7528\u7684\u5b57\u7bc0\u6578\u7b49\u65bc\u5be6\u969b\u5b58\u5132\u7684\u5b57\u7b26\u6578\u52a0\u4e0a 2 \u5b57\u7bc0\u7684\u9577\u5ea6\u4fe1\u606f\u3002<\/li>\n<li><strong>NVARCHAR<\/strong>: \u7528\u65bc\u5b58\u5132 Unicode \u5b57\u7b26\uff0c\u4f54\u7528\u7684\u5b57\u7bc0\u6578\u662f VARCHAR \u7684\u5169\u500d\u3002<\/li>\n<\/ul>\n<p>\u5728\u9078\u64c7\u5b57\u7b26\u4e32\u985e\u578b\u6642\uff0c\u61c9\u8003\u616e\u5230\u6578\u64da\u7684\u7279\u6027\u3002\u5982\u679c\u9700\u8981\u5b58\u5132\u591a\u8a9e\u8a00\u5b57\u7b26\uff0c\u5247\u61c9\u9078\u64c7 NVARCHAR\uff1b\u5982\u679c\u5b57\u7b26\u96c6\u56fa\u5b9a\u4e14\u4e0d\u9700\u8981 Unicode \u652f\u6301\uff0c\u5247\u53ef\u4ee5\u9078\u64c7 CHAR \u6216 VARCHAR\u3002<\/p>\n<h2 id=\"4-%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93%e9%a1%9e%e5%9e%8b%ef%bc%9adatetime-%e5%92%8c-date-hHegsiMwhG\">4. \u65e5\u671f\u548c\u6642\u9593\u985e\u578b\uff1aDATETIME \u548c DATE<\/h2>\n<p>SQL Server \u63d0\u4f9b\u4e86\u591a\u7a2e\u65e5\u671f\u548c\u6642\u9593\u985e\u578b\uff0c\u5176\u4e2d DATETIME \u548c DATE \u662f\u6700\u5e38\u7528\u7684\u3002\u5b83\u5011\u7684\u4e3b\u8981\u5340\u5225\u5728\u65bc\u5b58\u5132\u7684\u7bc4\u570d\u548c\u7cbe\u5ea6\uff1a<\/p>\n<ul>\n<li><strong>DATETIME<\/strong>: \u53ef\u4ee5\u5b58\u5132\u5f9e 1753 \u5e74\u5230 9999 \u5e74\u7684\u65e5\u671f\uff0c\u7cbe\u5ea6\u70ba 3.33 \u6beb\u79d2\u3002<\/li>\n<li><strong>DATE<\/strong>: \u53ef\u4ee5\u5b58\u5132\u5f9e 0001 \u5e74\u5230 9999 \u5e74\u7684\u65e5\u671f\uff0c\u7cbe\u5ea6\u70ba 1 \u5929\u3002<\/li>\n<\/ul>\n<p>\u5982\u679c\u53ea\u9700\u8981\u5b58\u5132\u65e5\u671f\u800c\u4e0d\u9700\u8981\u6642\u9593\uff0c\u5247\u53ef\u4ee5\u9078\u64c7 DATE\uff0c\u9019\u6a23\u53ef\u4ee5\u7bc0\u7701\u5b58\u5132\u7a7a\u9593\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-hHegsiMwhG\">\u7e3d\u7d50<\/h2>\n<p>\u5728 SQL Server \u4e2d\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u5c0d\u65bc\u6578\u64da\u7684\u5b58\u5132\u548c\u8655\u7406\u81f3\u95dc\u91cd\u8981\u3002\u4e86\u89e3\u5404\u7a2e\u6578\u64da\u985e\u578b\u7684\u7279\u9ede\u548c\u9069\u7528\u5834\u666f\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u8a2d\u8a08\u6578\u64da\u5eab\u7d50\u69cb\u3002\u7121\u8ad6\u662f\u6574\u6578\u3001\u6d6e\u9ede\u6578\u3001\u5b57\u7b26\u4e32\u9084\u662f\u65e5\u671f\u6642\u9593\u985e\u578b\uff0c\u6b63\u78ba\u7684\u9078\u64c7\u90fd\u80fd\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u53ef\u7dad\u8b77\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3 SQL Server \u4e2d\u6613\u6df7\u6dc6\u7684\u6578\u64da\u985e\u578b\uff0c\u5e6b\u52a9\u60a8\u9078\u64c7\u6b63\u78ba\u7684\u6578\u64da\u985e\u578b\u4ee5\u63d0\u9ad8\u6578\u64da\u5eab\u6027\u80fd\u548c\u6e96\u78ba\u6027\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-154599","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154599","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=154599"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154599\/revisions"}],"predecessor-version":[{"id":154600,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154599\/revisions\/154600"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=154599"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=154599"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=154599"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}