{"id":2370,"date":"2025-03-04T20:36:05","date_gmt":"2025-03-04T12:36:05","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2370"},"modified":"2025-03-04T20:36:05","modified_gmt":"2025-03-04T12:36:05","slug":"sqlite-%e8%a7%86%e5%9b%be%ef%bc%88view%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/04\/sqlite-%e8%a7%86%e5%9b%be%ef%bc%88view%ef%bc%89\/","title":{"rendered":"SQLite\u00a0\u89c6\u56fe\uff08View\uff09"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u5728 SQLite \u4e2d\uff0c<strong>\u89c6\u56fe\uff08View\uff09<\/strong> \u662f\u4e00\u4e2a\u865a\u62df\u8868\uff0c\u5b83\u57fa\u4e8e\u4e00\u4e2a\u6216\u591a\u4e2a\u8868\u7684\u67e5\u8be2\u7ed3\u679c\u3002\u89c6\u56fe\u672c\u8eab\u5e76\u4e0d\u5b58\u50a8\u6570\u636e\uff0c\u800c\u662f\u5b58\u50a8\u4e00\u4e2a SQL \u67e5\u8be2\u3002\u6bcf\u5f53\u4f60\u67e5\u8be2\u89c6\u56fe\u65f6\uff0cSQLite \u4f1a\u6267\u884c\u8be5\u67e5\u8be2\u5e76\u8fd4\u56de\u7ed3\u679c\u3002\u89c6\u56fe\u63d0\u4f9b\u4e86\u4e00\u79cd\u5c06\u590d\u6742\u67e5\u8be2\u5c01\u88c5\u4e3a\u7b80\u5355\u63a5\u53e3\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u548c\u53ef\u8bfb\u6027\u3002<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u521b\u5efa\u89c6\u56fe<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u521b\u5efa\u89c6\u56fe\u7684\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE VIEW view_name AS\nSELECT column1, column2, ...\nFROM table_name\nWHERE condition;<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>view_name<\/code>\uff1a\u89c6\u56fe\u7684\u540d\u79f0\u3002<\/li>\n\n\n\n<li><code>SELECT<\/code> \u8bed\u53e5\uff1a\u5b9a\u4e49\u89c6\u56fe\u6240\u57fa\u4e8e\u7684\u67e5\u8be2\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u793a\u4f8b<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE VIEW employee_view AS\nSELECT id, first_name, last_name, department\nFROM employees\nWHERE department = 'HR';<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u4f8b\u5b50\u521b\u5efa\u4e86\u4e00\u4e2a\u540d\u4e3a <code>employee_view<\/code> \u7684\u89c6\u56fe\uff0c\u5305\u542b\u4e86\u6240\u6709\u5c5e\u4e8e &#8220;HR&#8221; \u90e8\u95e8\u7684\u5458\u5de5\u7684 <code>id<\/code>\u3001<code>first_name<\/code>\u3001<code>last_name<\/code> \u548c <code>department<\/code> \u5217\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u67e5\u8be2\u89c6\u56fe<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u65e6\u521b\u5efa\u4e86\u89c6\u56fe\uff0c\u4f60\u53ef\u4ee5\u50cf\u67e5\u8be2\u666e\u901a\u8868\u4e00\u6837\u67e5\u8be2\u89c6\u56fe\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM employee_view;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u67e5\u8be2\u5c06\u8fd4\u56de <code>employee_view<\/code> \u89c6\u56fe\u4e2d\u7684\u6240\u6709\u6570\u636e\uff0c\u5b9e\u9645\u67e5\u8be2\u7684\u662f\u57fa\u4e8e\u89c6\u56fe\u5b9a\u4e49\u7684 <code>SELECT<\/code> \u67e5\u8be2\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u4fee\u6539\u89c6\u56fe<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">SQLite \u4e0d\u5141\u8bb8\u76f4\u63a5\u66f4\u65b0\u89c6\u56fe\u672c\u8eab\uff08\u5373\u4e0d\u80fd\u4f7f\u7528 <code>INSERT<\/code>\u3001<code>UPDATE<\/code> \u6216 <code>DELETE<\/code> \u6765\u76f4\u63a5\u64cd\u4f5c\u89c6\u56fe\uff09\u3002\u89c6\u56fe\u53ea\u662f\u4e00\u4e2a\u67e5\u8be2\u7684\u522b\u540d\uff0c\u56e0\u6b64\u5b83\u4e0d\u80fd\u76f4\u63a5\u5b58\u50a8\u6570\u636e\u3002\u4f46\u662f\uff0c\u5982\u679c\u89c6\u56fe\u57fa\u4e8e\u4e00\u4e2a\u7b80\u5355\u7684\u67e5\u8be2\uff0c\u4f60\u53ef\u4ee5\u4fee\u6539\u8868\u6570\u636e\uff0c\u89c6\u56fe\u4f1a\u53cd\u6620\u8fd9\u4e9b\u4fee\u6539\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. \u5220\u9664\u89c6\u56fe<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4f60\u4e0d\u518d\u9700\u8981\u67d0\u4e2a\u89c6\u56fe\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>DROP VIEW<\/code> \u547d\u4ee4\u5220\u9664\u5b83\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DROP VIEW IF EXISTS employee_view;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u547d\u4ee4\u4f1a\u5220\u9664 <code>employee_view<\/code> \u89c6\u56fe\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. \u89c6\u56fe\u7684\u66f4\u65b0\u9650\u5236<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 SQLite \u4e2d\uff0c\u89c6\u56fe\u5e76\u4e0d\u603b\u662f\u652f\u6301\u66f4\u65b0\u64cd\u4f5c\u3002\u901a\u5e38\uff0c\u5982\u679c\u89c6\u56fe\u662f\u7531\u7b80\u5355\u67e5\u8be2\uff08\u5982\u5355\u4e2a\u8868\u7684\u9009\u62e9\uff09\u6784\u6210\u7684\uff0c\u5e76\u4e14\u6ca1\u6709\u6d89\u53ca\u8054\u63a5\u6216\u805a\u5408\u7b49\u590d\u6742\u64cd\u4f5c\uff0c\u5b83\u662f\u53ef\u66f4\u65b0\u7684\u3002\u4f46\u5728\u6d89\u53ca\u590d\u6742\u67e5\u8be2\uff08\u4f8b\u5982\uff0c<code>JOIN<\/code>\u3001<code>GROUP BY<\/code>\u3001\u805a\u5408\u51fd\u6570\u7b49\uff09\u7684\u60c5\u51b5\u4e0b\uff0c\u89c6\u56fe\u901a\u5e38\u662f\u4e0d\u53ef\u66f4\u65b0\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u89c6\u56fe\u7684\u67e5\u8be2\u5305\u542b\u4e86\u65e0\u6cd5\u76f4\u63a5\u6620\u5c04\u56de\u8868\u7684\u6570\u636e\uff0cSQLite \u4f1a\u8fd4\u56de\u9519\u8bef\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE VIEW complex_view AS\nSELECT employees.id, employees.first_name, departments.name\nFROM employees\nJOIN departments ON employees.department_id = departments.id;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f60\u4e0d\u80fd\u76f4\u63a5\u66f4\u65b0\u8fd9\u4e2a <code>complex_view<\/code>\uff0c\u56e0\u4e3a\u5b83\u6d89\u53ca\u4e86\u8054\u63a5\u64cd\u4f5c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6. \u53ef\u66f4\u65b0\u89c6\u56fe\u7684\u6761\u4ef6<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8981\u4f7f\u89c6\u56fe\u53ef\u66f4\u65b0\uff08\u5373\u4f60\u53ef\u4ee5\u901a\u8fc7\u89c6\u56fe\u8fdb\u884c <code>INSERT<\/code>\u3001<code>UPDATE<\/code> \u6216 <code>DELETE<\/code> \u64cd\u4f5c\uff09\uff0c\u5fc5\u987b\u6ee1\u8db3\u4ee5\u4e0b\u6761\u4ef6\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u89c6\u56fe\u5e94\u57fa\u4e8e\u4e00\u4e2a\u5355\u4e00\u7684\u8868\u3002<\/li>\n\n\n\n<li>\u89c6\u56fe\u4e2d\u4e0d\u80fd\u4f7f\u7528 <code>GROUP BY<\/code>\u3001<code>DISTINCT<\/code> \u6216\u805a\u5408\u51fd\u6570\u3002<\/li>\n\n\n\n<li>\u89c6\u56fe\u7684\u5217\u5fc5\u987b\u662f\u4ece\u539f\u59cb\u8868\u4e2d\u76f4\u63a5\u6620\u5c04\u8fc7\u6765\u7684\uff0c\u800c\u4e0d\u80fd\u5305\u542b\u8ba1\u7b97\u6216\u8f6c\u6362\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">7. \u89c6\u56fe\u7684\u6027\u80fd<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7531\u4e8e\u89c6\u56fe\u662f\u57fa\u4e8e\u67e5\u8be2\u7684\u865a\u62df\u8868\uff0c\u56e0\u6b64\u6bcf\u6b21\u67e5\u8be2\u89c6\u56fe\u65f6\uff0cSQLite \u90fd\u4f1a\u6267\u884c\u89c6\u56fe\u5b9a\u4e49\u4e2d\u7684 SQL \u67e5\u8be2\u3002\u8fd9\u53ef\u80fd\u4f1a\u5f71\u54cd\u6027\u80fd\uff0c\u7279\u522b\u662f\u5728\u89c6\u56fe\u6d89\u53ca\u591a\u4e2a\u8868\u8054\u63a5\u6216\u590d\u6742\u67e5\u8be2\u7684\u60c5\u51b5\u4e0b\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u4f60\u9891\u7e41\u67e5\u8be2\u590d\u6742\u7684\u89c6\u56fe\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528<strong>\u7269\u5316\u89c6\u56fe<\/strong>\uff08\u5728 SQLite \u4e2d\u5e76\u6ca1\u6709\u76f4\u63a5\u652f\u6301\u7269\u5316\u89c6\u56fe\uff0c\u4f46\u4f60\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u8868\u5b58\u50a8\u89c6\u56fe\u7ed3\u679c\u7684\u65b9\u5f0f\u6765\u6a21\u62df\u7269\u5316\u89c6\u56fe\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">8. \u89c6\u56fe\u7684\u4f7f\u7528\u573a\u666f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u89c6\u56fe\u901a\u5e38\u7528\u4e8e\u4ee5\u4e0b\u573a\u666f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u7b80\u5316\u590d\u6742\u67e5\u8be2<\/strong>\uff1a\u4f60\u53ef\u4ee5\u5c06\u590d\u6742\u7684\u67e5\u8be2\u5c01\u88c5\u5230\u89c6\u56fe\u4e2d\uff0c\u4f7f\u5f97\u5e94\u7528\u7a0b\u5e8f\u67e5\u8be2\u66f4\u7b80\u6d01\u3002<\/li>\n\n\n\n<li><strong>\u63d0\u9ad8\u5b89\u5168\u6027<\/strong>\uff1a\u901a\u8fc7\u89c6\u56fe\uff0c\u4f60\u53ef\u4ee5\u9650\u5236\u7528\u6237\u8bbf\u95ee\u6570\u636e\u5e93\u4e2d\u7684\u67d0\u4e9b\u654f\u611f\u6570\u636e\u3002\u4f8b\u5982\uff0c\u4f60\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u89c6\u56fe\uff0c\u53ea\u663e\u793a\u5458\u5de5\u7684\u975e\u654f\u611f\u4fe1\u606f\uff0c\u800c\u9690\u85cf\u5de5\u8d44\u6216\u5176\u4ed6\u9690\u79c1\u6570\u636e\u3002<\/li>\n\n\n\n<li><strong>\u6570\u636e\u805a\u5408<\/strong>\uff1a\u4f60\u53ef\u4ee5\u4f7f\u7528\u89c6\u56fe\u6765\u521b\u5efa\u805a\u5408\u6570\u636e\u7684\u7b80\u6d01\u8868\u793a\uff0c\u4f8b\u5982\u7edf\u8ba1\u4fe1\u606f\u6216\u62a5\u8868\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">9. \u603b\u7ed3<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u89c6\u56fe<\/strong>\uff1a\u662f\u4e00\u79cd\u865a\u62df\u7684\u8868\uff0c\u5b83\u57fa\u4e8e <code>SELECT<\/code> \u67e5\u8be2\u3002<\/li>\n\n\n\n<li><strong>\u521b\u5efa\u89c6\u56fe<\/strong>\uff1a\u4f7f\u7528 <code>CREATE VIEW<\/code> \u547d\u4ee4\u3002<\/li>\n\n\n\n<li><strong>\u67e5\u8be2\u89c6\u56fe<\/strong>\uff1a\u4e0e\u67e5\u8be2\u666e\u901a\u8868\u76f8\u540c\uff0c\u4f7f\u7528 <code>SELECT<\/code> \u8bed\u53e5\u3002<\/li>\n\n\n\n<li><strong>\u5220\u9664\u89c6\u56fe<\/strong>\uff1a\u4f7f\u7528 <code>DROP VIEW<\/code> \u547d\u4ee4\u3002<\/li>\n\n\n\n<li><strong>\u89c6\u56fe\u66f4\u65b0<\/strong>\uff1a\u89c6\u56fe\u901a\u5e38\u4e0d\u80fd\u76f4\u63a5\u66f4\u65b0\uff0c\u7279\u522b\u662f\u6d89\u53ca\u590d\u6742\u67e5\u8be2\u65f6\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u89c6\u56fe\u662f\u7b80\u5316\u6570\u636e\u5e93\u64cd\u4f5c\u548c\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\u7684\u6709\u529b\u5de5\u5177\uff0c\u4f46\u5728\u8bbe\u8ba1\u65f6\u9700\u8981\u6ce8\u610f\u89c6\u56fe\u7684\u53ef\u66f4\u65b0\u6027\u548c\u6027\u80fd\u95ee\u9898\u3002\u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 SQLite \u4e2d\uff0c\u89c6\u56fe\uff08View\uff09 \u662f\u4e00\u4e2a\u865a\u62df\u8868\uff0c\u5b83\u57fa\u4e8e\u4e00\u4e2a\u6216\u591a\u4e2a\u8868\u7684\u67e5\u8be2\u7ed3\u679c\u3002\u89c6\u56fe\u672c\u8eab\u5e76\u4e0d\u5b58\u50a8\u6570\u636e\uff0c\u800c\u662f [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[76],"tags":[],"class_list":["post-2370","post","type-post","status-publish","format-standard","hentry","category-sqlite"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2370","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=2370"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2370\/revisions"}],"predecessor-version":[{"id":2371,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2370\/revisions\/2371"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2370"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2370"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}