{"id":75928,"date":"2024-10-16T02:24:18","date_gmt":"2024-10-15T18:24:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/75928\/"},"modified":"2024-10-16T02:24:18","modified_gmt":"2024-10-15T18:24:18","slug":"mysql-%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e5%92%8c%e5%bb%ba%e5%ba%ab%e7%ad%96%e7%95%a5%e8%a9%b3%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/75928\/","title":{"rendered":"MySQL \u7684\u6578\u64da\u985e\u578b\u548c\u5efa\u5eab\u7b56\u7565\u8a73\u89e3"},"content":{"rendered":"<h1 id=\"mysql-%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e5%92%8c%e5%bb%ba%e5%ba%ab%e7%ad%96%e7%95%a5%e8%a9%b3%e8%a7%a3-ifalOeYkzM\">MySQL \u7684\u6578\u64da\u985e\u578b\u548c\u5efa\u5eab\u7b56\u7565\u8a73\u89e3<\/h1>\n<p>MySQL \u662f\u4e00\u7a2e\u6d41\u884c\u7684\u958b\u6e90\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u4e86\u89e3 MySQL \u7684\u6578\u64da\u985e\u578b\u53ca\u5176\u5efa\u5eab\u7b56\u7565\u5c0d\u65bc\u8a2d\u8a08\u9ad8\u6548\u7684\u6578\u64da\u5eab\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e MySQL \u7684\u6578\u64da\u985e\u578b\u53ca\u5176\u5efa\u5eab\u7b56\u7565\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u8a2d\u8a08\u548c\u7ba1\u7406\u6578\u64da\u5eab\u3002<\/p>\n<h2 id=\"mysql-%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-ifalOeYkzM\">MySQL \u7684\u6578\u64da\u985e\u578b<\/h2>\n<p>MySQL \u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u985e\u578b\uff0c\u4e3b\u8981\u5206\u70ba\u4ee5\u4e0b\u5e7e\u985e\uff1a<\/p>\n<h3 id=\"1-%e6%95%b4%e6%95%b8%e9%a1%9e%e5%9e%8b-ifalOeYkzM\">1. \u6574\u6578\u985e\u578b<\/h3>\n<ul>\n<li><code>TINYINT<\/code>: \u7bc4\u570d\u70ba -128 \u5230 127\uff08\u6709\u7b26\u865f\uff09\u6216 0 \u5230 255\uff08\u7121\u7b26\u865f\uff09\uff0c\u4f54\u7528 1 \u5b57\u7bc0\u3002<\/li>\n<li><code>SMALLINT<\/code>: \u7bc4\u570d\u70ba -32,768 \u5230 32,767\uff08\u6709\u7b26\u865f\uff09\u6216 0 \u5230 65,535\uff08\u7121\u7b26\u865f\uff09\uff0c\u4f54\u7528 2 \u5b57\u7bc0\u3002<\/li>\n<li><code>MEDIUMINT<\/code>: \u7bc4\u570d\u70ba -8,388,608 \u5230 8,388,607\uff08\u6709\u7b26\u865f\uff09\u6216 0 \u5230 16,777,215\uff08\u7121\u7b26\u865f\uff09\uff0c\u4f54\u7528 3 \u5b57\u7bc0\u3002<\/li>\n<li><code>INT<\/code>: \u7bc4\u570d\u70ba -2,147,483,648 \u5230 2,147,483,647\uff08\u6709\u7b26\u865f\uff09\u6216 0 \u5230 4,294,967,295\uff08\u7121\u7b26\u865f\uff09\uff0c\u4f54\u7528 4 \u5b57\u7bc0\u3002<\/li>\n<li><code>BIGINT<\/code>: \u7bc4\u570d\u70ba -9,223,372,036,854,775,808 \u5230 9,223,372,036,854,775,807\uff08\u6709\u7b26\u865f\uff09\u6216 0 \u5230 18,446,744,073,709,551,615\uff08\u7121\u7b26\u865f\uff09\uff0c\u4f54\u7528 8 \u5b57\u7bc0\u3002<\/li>\n<\/ul>\n<h3 id=\"2-%e6%b5%ae%e9%bb%9e%e6%95%b8%e9%a1%9e%e5%9e%8b-ifalOeYkzM\">2. \u6d6e\u9ede\u6578\u985e\u578b<\/h3>\n<ul>\n<li><code>FLOAT<\/code>: \u7528\u65bc\u5b58\u5132\u55ae\u7cbe\u5ea6\u6d6e\u9ede\u6578\uff0c\u4f54\u7528 4 \u5b57\u7bc0\u3002<\/li>\n<li><code>DOUBLE<\/code>: \u7528\u65bc\u5b58\u5132\u96d9\u7cbe\u5ea6\u6d6e\u9ede\u6578\uff0c\u4f54\u7528 8 \u5b57\u7bc0\u3002<\/li>\n<li><code>DECIMAL<\/code>: \u7528\u65bc\u5b58\u5132\u7cbe\u78ba\u7684\u6578\u503c\uff0c\u7279\u5225\u9069\u5408\u8ca1\u52d9\u8a08\u7b97\uff0c\u4f54\u7528\u7684\u5b57\u7bc0\u6578\u6839\u64da\u5b9a\u7fa9\u7684\u7cbe\u5ea6\u800c\u7570\u3002<\/li>\n<\/ul>\n<h3 id=\"3-%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%a1%9e%e5%9e%8b-ifalOeYkzM\">3. \u5b57\u7b26\u4e32\u985e\u578b<\/h3>\n<ul>\n<li><code>CHAR<\/code>: \u56fa\u5b9a\u9577\u5ea6\u7684\u5b57\u7b26\u4e32\uff0c\u6700\u5927\u9577\u5ea6\u70ba 255 \u5b57\u7b26\u3002<\/li>\n<li><code>VARCHAR<\/code>: \u53ef\u8b8a\u9577\u5ea6\u7684\u5b57\u7b26\u4e32\uff0c\u6700\u5927\u9577\u5ea6\u70ba 65,535 \u5b57\u7b26\u3002<\/li>\n<li><code>TINYTEXT<\/code>: \u6700\u5927\u9577\u5ea6\u70ba 255 \u5b57\u7b26\u7684\u6587\u672c\u3002<\/li>\n<li><code>TEXT<\/code>: \u6700\u5927\u9577\u5ea6\u70ba 65,535 \u5b57\u7b26\u7684\u6587\u672c\u3002<\/li>\n<li><code>BLOB<\/code>: \u7528\u65bc\u5b58\u5132\u4e8c\u9032\u5236\u6578\u64da\uff0c\u6700\u5927\u9577\u5ea6\u70ba 65,535 \u5b57\u7b26\u3002<\/li>\n<\/ul>\n<h3 id=\"4-%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93%e9%a1%9e%e5%9e%8b-ifalOeYkzM\">4. \u65e5\u671f\u548c\u6642\u9593\u985e\u578b<\/h3>\n<ul>\n<li><code>DATE<\/code>: \u5b58\u5132\u65e5\u671f\uff0c\u7bc4\u570d\u70ba &#8216;1000-01-01&#8217; \u5230 &#8216;9999-12-31&#8217;\u3002<\/li>\n<li><code>TIME<\/code>: \u5b58\u5132\u6642\u9593\uff0c\u7bc4\u570d\u70ba &#8216;-838:59:59&#8217; \u5230 &#8216;838:59:59&#8217;\u3002<\/li>\n<li><code>DATETIME<\/code>: \u5b58\u5132\u65e5\u671f\u548c\u6642\u9593\uff0c\u7bc4\u570d\u70ba &#8216;1000-01-01 00:00:00&#8217; \u5230 &#8216;9999-12-31 23:59:59&#8217;\u3002<\/li>\n<li><code>TIMESTAMP<\/code>: \u5b58\u5132\u6642\u9593\u6233\uff0c\u7bc4\u570d\u70ba &#8216;1970-01-01 00:00:01&#8217; UTC \u5230 &#8216;2038-01-19 03:14:07&#8217; UTC\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%bb%ba%e5%ba%ab%e7%ad%96%e7%95%a5-ifalOeYkzM\">\u5efa\u5eab\u7b56\u7565<\/h2>\n<p>\u5728\u8a2d\u8a08 MySQL \u6578\u64da\u5eab\u6642\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u548c\u5efa\u5eab\u7b56\u7565\u81f3\u95dc\u91cd\u8981\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5efa\u8b70\uff1a<\/p>\n<h3 id=\"1-%e6%a0%b9%e6%93%9a%e9%9c%80%e6%b1%82%e9%81%b8%e6%93%87%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-ifalOeYkzM\">1. \u6839\u64da\u9700\u6c42\u9078\u64c7\u6578\u64da\u985e\u578b<\/h3>\n<p>\u5728\u9078\u64c7\u6578\u64da\u985e\u578b\u6642\uff0c\u61c9\u6839\u64da\u5be6\u969b\u9700\u6c42\u4f86\u9078\u64c7\u5408\u9069\u7684\u985e\u578b\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u9700\u8981\u5b58\u5132\u5927\u91cf\u6574\u6578\u7684\u5b57\u6bb5\uff0c\u61c9\u9078\u64c7 <code>BIGINT<\/code>\uff1b\u800c\u5c0d\u65bc\u5c0f\u7bc4\u570d\u7684\u6574\u6578\uff0c\u5247\u53ef\u4ee5\u9078\u64c7 <code>TINYINT<\/code>\u3002\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u7bc0\u7701\u5b58\u5132\u7a7a\u9593\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e7%b4%a2%e5%bc%95%e6%8f%90%e9%ab%98%e6%9f%a5%e8%a9%a2%e6%95%88%e7%8e%87-ifalOeYkzM\">2. \u4f7f\u7528\u7d22\u5f15\u63d0\u9ad8\u67e5\u8a62\u6548\u7387<\/h3>\n<p>\u5728\u9700\u8981\u983b\u7e41\u67e5\u8a62\u7684\u5b57\u6bb5\u4e0a\u6dfb\u52a0\u7d22\u5f15\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002\u7d22\u5f15\u53ef\u4ee5\u662f\u55ae\u5217\u7d22\u5f15\u6216\u591a\u5217\u7d22\u5f15\uff0c\u6839\u64da\u67e5\u8a62\u7684\u9700\u6c42\u9032\u884c\u8a2d\u8a08\u3002<\/p>\n<h3 id=\"3-%e6%ad%a3%e8%a6%8f%e5%8c%96%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%ad%e8%a8%88-ifalOeYkzM\">3. \u6b63\u898f\u5316\u6578\u64da\u5eab\u8a2d\u8a08<\/h3>\n<p>\u6b63\u898f\u5316\u662f\u6307\u5c07\u6578\u64da\u5206\u89e3\u70ba\u591a\u500b\u8868\uff0c\u4ee5\u6d88\u9664\u5197\u9918\u6578\u64da\u3002\u9019\u6a23\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u901a\u5e38\uff0c\u6578\u64da\u5eab\u8a2d\u8a08\u61c9\u9075\u5faa\u7b2c\u4e00\u3001\u7b2c\u4e8c\u548c\u7b2c\u4e09\u6b63\u898f\u5f62\u5f0f\u3002<\/p>\n<h3 id=\"4-%e8%80%83%e6%85%ae%e6%9c%aa%e4%be%86%e6%93%b4%e5%b1%95%e6%80%a7-ifalOeYkzM\">4. \u8003\u616e\u672a\u4f86\u64f4\u5c55\u6027<\/h3>\n<p>\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\uff0c\u61c9\u8003\u616e\u672a\u4f86\u7684\u64f4\u5c55\u6027\u3002\u4f8b\u5982\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u548c\u8868\u7d50\u69cb\uff0c\u4ee5\u4fbf\u5728\u672a\u4f86\u80fd\u5920\u8f15\u9b06\u6dfb\u52a0\u65b0\u5b57\u6bb5\u6216\u65b0\u8868\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ifalOeYkzM\">\u7e3d\u7d50<\/h2>\n<p>\u4e86\u89e3 MySQL \u7684\u6578\u64da\u985e\u578b\u53ca\u5176\u5efa\u5eab\u7b56\u7565\u5c0d\u65bc\u8a2d\u8a08\u9ad8\u6548\u7684\u6578\u64da\u5eab\u81f3\u95dc\u91cd\u8981\u3002\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u3001\u4f7f\u7528\u7d22\u5f15\u3001\u6b63\u898f\u5316\u8a2d\u8a08\u4ee5\u53ca\u8003\u616e\u672a\u4f86\u64f4\u5c55\u6027\u90fd\u662f\u6210\u529f\u7684\u95dc\u9375\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u60a8\u53ef\u4ee5\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u61c9\u7528\u63d0\u4f9b\u5f37\u5927\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0e MySQL \u7684\u6578\u64da\u985e\u578b\u53ca\u5efa\u5eab\u7b56\u7565\uff0c\u5e6b\u52a9\u60a8\u9078\u64c7\u6700\u4f73\u8a2d\u8a08\u4ee5\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\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-75928","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75928","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=75928"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75928\/revisions"}],"predecessor-version":[{"id":75929,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75928\/revisions\/75929"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=75928"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=75928"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=75928"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}