{"id":371,"date":"2020-12-05T03:01:43","date_gmt":"2020-12-04T19:01:43","guid":{"rendered":"http:\/\/moyisuiying.com\/?p=371"},"modified":"2020-12-10T14:23:59","modified_gmt":"2020-12-10T06:23:59","slug":"mysql%e5%ad%a6%e4%b9%a0%e4%b8%8e%e5%ae%9e%e9%aa%8c%ef%bc%88%e5%9b%9b%ef%bc%89-%e8%a7%86%e5%9b%be%e5%ae%9e%e9%aa%8c","status":"publish","type":"post","link":"http:\/\/moyisuiying.com\/index.php\/experiment\/mysqlexperiment\/371.html","title":{"rendered":"MYSQL\u5b66\u4e60\u4e0e\u5b9e\u9a8c\uff08\u56db\uff09\u2014\u2014\u89c6\u56fe\u5b9e\u9a8c"},"content":{"rendered":"\n<h2>4.\u89c6\u56fe\u5b9e\u9a8c<\/h2>\n\n\n\n<h3>4.1\u89c6\u56fe\u7684\u5b9a\u4e49<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote\"><p>\u200b MySQL \u89c6\u56fe\uff08View\uff09\u662f\u4e00\u79cd\u865a\u62df\u5b58\u5728\u7684\u8868\uff0c\u540c\u771f\u5b9e\u8868\u4e00\u6837\uff0c\u89c6\u56fe\u4e5f\u7531\u5217\u548c\u884c\u6784\u6210\uff0c\u4f46\u89c6\u56fe\u5e76\u4e0d\u5b9e\u9645\u5b58\u5728\u4e8e\u6570\u636e\u5e93\u4e2d\u3002\u884c\u548c\u5217\u7684\u6570\u636e\u6765\u81ea\u4e8e\u5b9a\u4e49\u89c6\u56fe\u7684\u67e5\u8be2\u4e2d\u6240\u4f7f\u7528\u7684\u8868\uff0c\u5e76\u4e14\u8fd8\u662f\u5728\u4f7f\u7528\u89c6\u56fe\u65f6\u52a8\u6001\u751f\u6210\u7684\u3002\u6570\u636e\u5e93\u4e2d\u53ea\u5b58\u653e\u4e86\u89c6\u56fe\u7684\u5b9a\u4e49\uff0c\u5e76\u6ca1\u6709\u5b58\u653e\u89c6\u56fe\u4e2d\u7684\u6570\u636e\uff0c\u8fd9\u4e9b\u6570\u636e\u90fd\u5b58\u653e\u5728\u5b9a\u4e49\u89c6\u56fe\u67e5\u8be2\u6240\u5f15\u7528\u7684\u771f\u5b9e\u8868\u4e2d\u3002<\/p><\/blockquote>\n\n\n\n<p>\u200b \u4f7f\u7528\u89c6\u56fe\u67e5\u8be2\u6570\u636e\u65f6\uff0c\u6570\u636e\u5e93\u4f1a\u4ece\u771f\u5b9e\u8868\u4e2d\u53d6\u51fa\u5bf9\u5e94\u7684\u6570\u636e\u3002\u56e0\u6b64\uff0c\u89c6\u56fe\u4e2d\u7684\u6570\u636e\u662f\u4f9d\u8d56\u4e8e\u771f\u5b9e\u8868\u4e2d\u7684\u6570\u636e\u7684\u3002\u4e00\u65e6\u771f\u5b9e\u8868\u4e2d\u7684\u6570\u636e\u53d1\u751f\u6539\u53d8\uff0c\u663e\u793a\u5728\u89c6\u56fe\u4e2d\u7684\u6570\u636e\u4e5f\u4f1a\u53d1\u751f\u6539\u53d8\u3002\u89c6\u56fe\u53ef\u4ee5\u4ece\u539f\u6709\u7684\u8868\u4e0a\u9009\u53d6\u5bf9\u7528\u6237\u6709\u7528\u7684\u4fe1\u606f\uff0c\u90a3\u4e9b\u5bf9\u7528\u6237\u6ca1\u7528\uff0c\u6216\u8005\u7528\u6237\u6ca1\u6709\u6743\u9650\u4e86\u89e3\u7684\u4fe1\u606f\uff0c\u90fd\u53ef\u4ee5\u76f4\u63a5\u5c4f\u853d\u6389\uff0c\u4f5c\u7528\u7c7b\u4f3c\u4e8e\u7b5b\u9009\u3002\u8fd9\u6837\u505a\u65e2\u4f7f\u5e94\u7528\u7b80\u5355\u5316\uff0c\u4e5f\u4fdd\u8bc1\u4e86\u7cfb\u7edf\u7684\u5b89\u5168\u3002<\/p>\n\n\n\n<h3>4.2\u521b\u5efa\u89c6\u56fe<\/h3>\n\n\n\n<h3>4.2.1\u57fa\u672c\u8bed\u6cd5<\/h3>\n\n\n\n<p>\u53ef\u4ee5\u4f7f\u7528 CREATE VIEW \u8bed\u53e5\u6765\u521b\u5efa\u89c6\u56fe\u3002<\/p>\n\n\n\n<p>\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE VIEW &lt;\u89c6\u56fe\u540d> AS &lt;SELECT\u8bed\u53e5><\/code><\/pre>\n\n\n\n<p>\u8bed\u6cd5\u8bf4\u660e\u5982\u4e0b\u3002<\/p>\n\n\n\n<p>\u2460&lt;\u89c6\u56fe\u540d&gt;`\uff1a\u6307\u5b9a\u89c6\u56fe\u7684\u540d\u79f0\u3002\u8be5\u540d\u79f0\u5728\u6570\u636e\u5e93\u4e2d\u5fc5\u987b\u662f\u552f\u4e00\u7684\uff0c\u4e0d\u80fd\u4e0e\u5176\u4ed6\u8868\u6216\u89c6\u56fe\u540c\u540d\u3002<\/p>\n\n\n\n<p>\u2461`\uff1a\u6307\u5b9a\u521b\u5efa\u89c6\u56fe\u7684 SELECT \u8bed\u53e5\uff0c\u53ef\u7528\u4e8e\u67e5\u8be2\u591a\u4e2a\u57fa\u7840\u8868\u6216\u6e90\u89c6\u56fe\u3002<\/p>\n\n\n\n<h4>4.2.2\u5bf9\u4e8e\u521b\u5efa\u89c6\u56fe\u4e2d\u7684 SELECT \u8bed\u53e5\u7684\u6307\u5b9a\u5b58\u5728\u4ee5\u4e0b\u9650\u5236\uff1a<\/h4>\n\n\n\n<blockquote class=\"wp-block-quote\"><p>\u2460\u7528\u6237\u9664\u4e86\u62e5\u6709 CREATE VIEW \u6743\u9650\u5916\uff0c\u8fd8\u5177\u6709\u64cd\u4f5c\u4e2d\u6d89\u53ca\u7684\u57fa\u7840\u8868\u548c\u5176\u4ed6\u89c6\u56fe\u7684\u76f8\u5173\u6743\u9650\u3002<\/p><p>\u2461SELECT \u8bed\u53e5\u4e0d\u80fd\u5f15\u7528\u7cfb\u7edf\u6216\u7528\u6237\u53d8\u91cf\u3002<\/p><p>\u2462SELECT \u8bed\u53e5\u4e0d\u80fd\u5305\u542b FROM \u5b50\u53e5\u4e2d\u7684\u5b50\u67e5\u8be2\u3002<\/p><p>\u2463SELECT \u8bed\u53e5\u4e0d\u80fd\u5f15\u7528\u9884\u5904\u7406\u8bed\u53e5\u53c2\u6570\u3002<br>\u89c6\u56fe\u5b9a\u4e49\u4e2d\u5f15\u7528\u7684\u8868\u6216\u89c6\u56fe\u5fc5\u987b\u5b58\u5728\u3002\u4f46\u662f\uff0c\u521b\u5efa\u5b8c\u89c6\u56fe\u540e\uff0c\u53ef\u4ee5\u5220\u9664\u5b9a\u4e49\u5f15\u7528\u7684\u8868\u6216\u89c6\u56fe\u3002\u53ef\u4f7f\u7528 CHECK TABLE \u8bed\u53e5\u68c0\u67e5\u89c6\u56fe\u5b9a\u4e49\u662f\u5426\u5b58\u5728\u8fd9\u7c7b\u95ee\u9898\u3002<\/p><\/blockquote>\n\n\n\n<p>\u200b \u89c6\u56fe\u5b9a\u4e49\u4e2d\u5141\u8bb8\u4f7f\u7528 ORDER BY \u8bed\u53e5\uff0c\u4f46\u662f\u82e5\u4ece\u7279\u5b9a\u89c6\u56fe\u8fdb\u884c\u9009\u62e9\uff0c\u800c\u8be5\u89c6\u56fe\u4f7f\u7528\u4e86\u81ea\u5df1\u7684 ORDER BY \u8bed\u53e5\uff0c\u5219\u89c6\u56fe\u5b9a\u4e49\u4e2d\u7684 ORDER BY \u5c06\u88ab\u5ffd\u7565\u3002<\/p>\n\n\n\n<p>\u200b \u89c6\u56fe\u5b9a\u4e49\u4e2d\u4e0d\u80fd\u5f15\u7528 TEMPORARY \u8868\uff08\u4e34\u65f6\u8868\uff09\uff0c\u4e0d\u80fd\u521b\u5efa TEMPORARY \u89c6\u56fe\u3002WITH CHECK OPTION \u7684\u610f\u601d\u662f\uff0c\u4fee\u6539\u89c6\u56fe\u65f6\uff0c\u68c0\u67e5\u63d2\u5165\u7684\u6570\u636e\u662f\u5426\u7b26\u5408 WHERE \u8bbe\u7f6e\u7684\u6761\u4ef6\u3002<\/p>\n\n\n\n<h2>4.3\u67e5\u770b\u89c6\u56fe\u7684\u5b57\u6bb5\u4fe1\u606f<\/h2>\n\n\n\n<p>\u67e5\u770b\u89c6\u56fe\u7684\u5b57\u6bb5\u4fe1\u606f\u4e0e\u67e5\u770b\u6570\u636e\u8868\u7684\u5b57\u6bb5\u4fe1\u606f\u4e00\u6837\uff0c\u90fd\u662f\u4f7f\u7528 DESCRIBE \u5173\u952e\u5b57\u6765\u67e5\u770b\u7684\u3002\u5177\u4f53\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DESCRIBE \u89c6\u56fe\u540d;<\/code><\/pre>\n\n\n\n<p>\u6216\u7b80\u5199\u6210\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DESC \u89c6\u56fe\u540d;<\/code><\/pre>\n\n\n\n<h3>4.4\u4fee\u6539\u89c6\u56fe<\/h3>\n\n\n\n<h4>4.4.1\u57fa\u672c\u8bed\u6cd5<\/h4>\n\n\n\n<p>\u53ef\u4ee5\u4f7f\u7528 ALTER VIEW \u8bed\u53e5\u6765\u5bf9\u5df2\u6709\u7684\u89c6\u56fe\u8fdb\u884c\u4fee\u6539\u3002<\/p>\n\n\n\n<p>\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ALTER VIEW &lt;\u89c6\u56fe\u540d> AS &lt;SELECT\u8bed\u53e5><\/code><\/pre>\n\n\n\n<p>\u8bed\u6cd5\u8bf4\u660e\u5982\u4e0b\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote\"><p>\u2460&lt;\u89c6\u56fe\u540d&gt;`\uff1a\u6307\u5b9a\u89c6\u56fe\u7684\u540d\u79f0\u3002\u8be5\u540d\u79f0\u5728\u6570\u636e\u5e93\u4e2d\u5fc5\u987b\u662f\u552f\u4e00\u7684\uff0c\u4e0d\u80fd\u4e0e\u5176\u4ed6\u8868\u6216\u89c6\u56fe\u540c\u540d\u3002<\/p><p>\u2461`\uff1a\u6307\u5b9a\u521b\u5efa\u89c6\u56fe\u7684 SELECT \u8bed\u53e5\uff0c\u53ef\u7528\u4e8e\u67e5\u8be2\u591a\u4e2a\u57fa\u7840\u8868\u6216\u6e90\u89c6\u56fe\u3002 \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5bf9\u4e8e ALTER VIEW \u8bed\u53e5\u7684\u4f7f\u7528\uff0c\u9700\u8981\u7528\u6237\u5177\u6709\u9488\u5bf9\u89c6\u56fe\u7684 CREATE VIEW \u548c DROP \u6743\u9650\uff0c\u4ee5\u53ca\u7531 SELECT \u8bed\u53e5\u9009\u62e9\u7684\u6bcf\u4e00\u5217\u4e0a\u7684\u67d0\u4e9b\u6743\u9650\u3002 \u200b \u4fee\u6539\u89c6\u56fe\u7684\u5b9a\u4e49\uff0c\u9664\u4e86\u53ef\u4ee5\u901a\u8fc7 ALTER VIEW \u5916\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528 DROP VIEW \u8bed\u53e5\u5148\u5220\u9664\u89c6\u56fe\uff0c\u518d\u4f7f\u7528 CREATE VIEW \u8bed\u53e5\u6765\u5b9e\u73b0\u3002<\/p><\/blockquote>\n\n\n\n<h4>4.4.2\u4fee\u6539\u89c6\u56fe\u5185\u5bb9<\/h4>\n\n\n\n<p>\u00b7\u89c6\u56fe\u662f\u4e00\u4e2a\u865a\u62df\u8868\uff0c\u5b9e\u9645\u7684\u6570\u636e\u6765\u81ea\u4e8e\u57fa\u672c\u8868\uff0c\u6240\u4ee5\u901a\u8fc7\u63d2\u5165\u3001\u4fee\u6539\u548c\u5220\u9664\u64cd\u4f5c\u66f4\u65b0\u89c6\u56fe\u4e2d\u7684\u6570\u636e\uff0c\u5b9e\u8d28\u4e0a\u662f\u5728\u66f4\u65b0\u89c6\u56fe\u6240\u5f15\u7528\u7684\u57fa\u672c\u8868\u7684\u6570\u636e\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote\"><p>\u6ce8\u610f\uff1a\u5bf9\u89c6\u56fe\u7684\u4fee\u6539\u5c31\u662f\u5bf9\u57fa\u672c\u8868\u7684\u4fee\u6539\uff0c\u56e0\u6b64\u5728\u4fee\u6539\u65f6\uff0c\u8981\u6ee1\u8db3\u57fa\u672c\u8868\u7684\u6570\u636e\u5b9a\u4e49\u3002<\/p><\/blockquote>\n\n\n\n<p>\u200b <strong>\u67d0\u4e9b\u89c6\u56fe\u662f\u53ef\u66f4\u65b0\u7684\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u53ef\u4ee5\u4f7f\u7528 UPDATE\u3001DELETE \u6216 INSERT \u7b49\u8bed\u53e5\u66f4\u65b0\u57fa\u672c\u8868\u7684\u5185\u5bb9\u3002\u5bf9\u4e8e\u53ef\u66f4\u65b0\u7684\u89c6\u56fe\uff0c\u89c6\u56fe\u4e2d\u7684\u884c\u548c\u57fa\u672c\u8868\u7684\u884c\u4e4b\u95f4\u5fc5\u987b\u5177\u6709\u4e00\u5bf9\u4e00\u7684\u5173\u7cfb\u3002<\/strong><\/p>\n\n\n\n<p>\u200b \u8fd8\u6709\u4e00\u4e9b\u7279\u5b9a\u7684\u5176\u4ed6\u7ed3\u6784\uff0c\u8fd9\u4e9b\u7ed3\u6784\u4f1a\u4f7f\u5f97\u89c6\u56fe\u4e0d\u53ef\u66f4\u65b0\u3002\u66f4\u5177\u4f53\u5730\u8bb2\uff0c\u5982\u679c\u89c6\u56fe\u5305\u542b\u4ee5\u4e0b\u7ed3\u6784\u4e2d\u7684\u4efb\u4f55\u4e00\u79cd\uff0c\u5b83\u5c31\u662f\u4e0d\u53ef\u66f4\u65b0\u7684\uff1a<\/p>\n\n\n\n<p>\u2460\u805a\u5408\u51fd\u6570 SUM()\u3001MIN()\u3001MAX()\u3001COUNT() \u7b49\u3002<\/p>\n\n\n\n<p>\u2461DISTINCT \u5173\u952e\u5b57\u3002<\/p>\n\n\n\n<p>\u2462GROUP BY \u5b50\u53e5\u3002<\/p>\n\n\n\n<p>\u2463HAVING \u5b50\u53e5\u3002<\/p>\n\n\n\n<p>\u2464UNION \u6216 UNION ALL \u8fd0\u7b97\u7b26\u3002<\/p>\n\n\n\n<p>\u2465\u4f4d\u4e8e\u9009\u62e9\u5217\u8868\u4e2d\u7684\u5b50\u67e5\u8be2\u3002<\/p>\n\n\n\n<p>\u2466FROM \u5b50\u53e5\u4e2d\u7684\u4e0d\u53ef\u66f4\u65b0\u89c6\u56fe\u6216\u5305\u542b\u591a\u4e2a\u8868\u3002<\/p>\n\n\n\n<p>\u2467WHERE \u5b50\u53e5\u4e2d\u7684\u5b50\u67e5\u8be2\uff0c\u5f15\u7528 FROM \u5b50\u53e5\u4e2d\u7684\u8868\u3002<\/p>\n\n\n\n<p>\u2468ALGORITHM \u9009\u9879\u4e3a TEMPTABLE\uff08\u4f7f\u7528\u4e34\u65f6\u8868\u603b\u4f1a\u4f7f\u89c6\u56fe\u6210\u4e3a\u4e0d\u53ef\u66f4\u65b0\u7684\uff09\u7684\u65f6\u5019\u3002<\/p>\n\n\n\n<h3>4.5\u5220\u9664\u89c6\u56fe<\/h3>\n\n\n\n<h4>4.5.1\u57fa\u672c\u8bed\u6cd5<\/h4>\n\n\n\n<p>\u53ef\u4ee5\u4f7f\u7528 DROP VIEW \u8bed\u53e5\u6765\u5220\u9664\u89c6\u56fe\u3002<\/p>\n\n\n\n<p>\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DROP VIEW &lt;\u89c6\u56fe\u540d1> &#91; , &lt;\u89c6\u56fe\u540d2> \u2026]<\/code><\/pre>\n\n\n\n<p>\u5176\u4e2d\uff1a<code>&lt;\u89c6\u56fe\u540d&gt;<\/code>\u6307\u5b9a\u8981\u5220\u9664\u7684\u89c6\u56fe\u540d\u3002DROP VIEW \u8bed\u53e5\u53ef\u4ee5\u4e00\u6b21\u5220\u9664\u591a\u4e2a\u89c6\u56fe\uff0c\u4f46\u662f\u5fc5\u987b\u5728\u6bcf\u4e2a\u89c6\u56fe\u4e0a\u62e5\u6709 DROP \u6743\u9650\u3002<\/p>\n\n\n\n<h3>4.6\u67e5\u770b\u89c6\u56fe\u4e2d\u7684\u6570\u636e<\/h3>\n\n\n\n<p>\u67e5\u770b\u89c6\u56fe\u4e2d\u7684\u6570\u636e\u53ef\u4ee5\u4f7f\u7528<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>select  ... from  \u89c6\u56fe\u540d ...<\/code><\/pre>\n\n\n\n<p>\u8bed\u53e5\u6765\u67e5\u8be2\uff0c\u548c\u67e5\u8be2\u8868\u4e2d\u6570\u636e\u4e00\u6837\u7528\u6cd5\u3002\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>select age from v_em where name = \"\u674e\u4e3d\";<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>select v_em.employeeID,v_dp.name ,workYear   from v_dp JOIN v_em ON v_dp.employeeID = v_em.employeeID ;<\/code><\/pre>\n\n\n\n<h3>4.7\u793a\u4f8b<\/h3>\n\n\n\n<h4>5.7.1\u521b\u5efaDBEM\u6570\u636e\u5e93\u4e0a\u7684\u89c6\u56fev_dp\uff0c\u5305\u542bdepartment\u7684\u5168\u90e8\u4fe1\u606f<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>create view v_dp as select  from department with check option;<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image\"><img   class=\"lazyload\" data-src=\"https:\/\/img-blog.csdnimg.cn\/20201205031435231.jpg?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE4NzAwMjI=,size_16,color_FFFFFF,t_70#pic_center\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure >\n<noscript><img src=\"https:\/\/img-blog.csdnimg.cn\/20201205031435231.jpg?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE4NzAwMjI=,size_16,color_FFFFFF,t_70#pic_center\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure><\/noscript>\n\n\n\n<h4>4.7.2\u521b\u5efaDBEM\u6570\u636e\u5e93\u4e0a\u7684\u89c6\u56fev_em\uff0c\u5305\u542b\u5458\u5de5\u53f7\u7801\u3001\u59d3\u540d\u548c\u5b9e\u9645\u6536\u5165<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>create view v_em(employeeID,name,realIncome) as select employee.employeeID,employee.name,(salary.income -\\**** ***\\*salary.outcome ) as realIncome from  employee  join  salary on employee.employeeID = salary.employeeID;<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image\"><img   class=\"lazyload\" data-src=\"https:\/\/img-blog.csdnimg.cn\/20201205031449995.jpg#pic_center\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure >\n<noscript><img src=\"https:\/\/img-blog.csdnimg.cn\/20201205031449995.jpg#pic_center\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure><\/noscript>\n\n\n\n<h4>4.7.3\u4ecev_em\u89c6\u56fe\u4e2d\u67e5\u8be2\u59d3\u540d\u4e3a\u201c\u674e\u4e3d\u201d\u7684\u5458\u5de5\u7684\u5b9e\u9645\u6536\u5165<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code> select realIncome from v_em where name = \"\u674e\u4e3d\";<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image\"><img   class=\"lazyload\" data-src=\"https:\/\/img-blog.csdnimg.cn\/20201205031502584.jpg#pic_center\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure >\n<noscript><img src=\"https:\/\/img-blog.csdnimg.cn\/20201205031502584.jpg#pic_center\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure><\/noscript>\n\n\n\n<h4>4.7.4.\u5411v_dp\u89c6\u56fe\u4e2d\u63d2\u5165\u4e00\u884c\u6570\u636e\uff1a6\uff0c\u5e7f\u544a\u90e8\uff0c\u63a8\u5e7f\u4ea7\u54c1\u3002\u6267\u884c\u5b8c\u4e4b\u540e\u5206\u522b\u67e5\u770b\u89c6\u56fev_dp\u548c\u8868department\u4e2d\u53d1\u751f\u7684\u53d8\u5316\u3002<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>insert into v_dp(departmentID,departName,comment) values(6,\"\u5e7f\u544a\u90e8\",\"\u63a8\u5e7f\u4ea7\u54c1\");<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image\"><img   class=\"lazyload\" data-src=\"https:\/\/img-blog.csdnimg.cn\/20201205031515752.jpg?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE4NzAwMjI=,size_16,color_FFFFFF,t_70#pic_center\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure >\n<noscript><img src=\"https:\/\/img-blog.csdnimg.cn\/20201205031515752.jpg?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE4NzAwMjI=,size_16,color_FFFFFF,t_70#pic_center\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure><\/noscript>\n\n\n\n<p>\u53ef\u4ee5\u53d1\u73b0\uff0c\u5f53\u5728\u89c6\u56fev_dp\u4e2d\u63d2\u5165\u4e00\u6761\u6570\u636e\u65f6\uff0cdepartment\u4e2d\u4e5f\u63d2\u5165\u4e86\u4e00\u6761\u6570\u636e\u3002<\/p>\n\n\n\n<h4>4.7.5\u5c1d\u8bd5\u5411v_em\u89c6\u56fe\u4e2d\u63d2\u5165\u4e00\u884c\u6570\u636e\uff0c\u770b\u770b\u4f1a\u53d1\u751f\u4ec0\u4e48\u60c5\u51b5<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>insert into v_em(\"100020\",\"\u8d75\u67f3\",8000);<\/code><\/pre>\n\n\n\n<p>ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '\"100020\",\"\u8d75\u67f3\",8000)' at line 1<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img   class=\"lazyload\" data-src=\"https:\/\/img-blog.csdnimg.cn\/20201205031531653.jpg#pic_center\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure >\n<noscript><img src=\"https:\/\/img-blog.csdnimg.cn\/20201205031531653.jpg#pic_center\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure><\/noscript>\n\n\n\n<p>\u63d2\u5165\u6570\u636e\u65f6\u53d1\u751f\u4e86\u9519\u8bef\u3002<\/p>\n\n\n\n<h4>4.7.6\u4fee\u6539\u89c6\u56fev_em\u4e2d\u53f7\u7801\u4e3a102208\u7684\u96c7\u5458\u7684\u59d3\u540d\u4e3a\u201c\u8d75\u67f3\u201c<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>update v_em set name = \"\u8d75\u67f3\" where employeeID = \"102208\";<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image\"><img   class=\"lazyload\" data-src=\"https:\/\/img-blog.csdnimg.cn\/20201205031544461.jpg?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE4NzAwMjI=,size_16,color_FFFFFF,t_70#pic_center\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure >\n<noscript><img src=\"https:\/\/img-blog.csdnimg.cn\/20201205031544461.jpg?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE4NzAwMjI=,size_16,color_FFFFFF,t_70#pic_center\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure><\/noscript>\n\n\n\n<h4>4.7.7\u5220\u9664\u89c6\u56fev_dp\u4e2d\u90e8\u95e8\u53f7\u4e3a\u201c2\u201d\u7684\u6570\u636e<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>delete from v_dp where departmentID = 2;<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image\"><img   class=\"lazyload\" data-src=\"https:\/\/img-blog.csdnimg.cn\/20201205031557506.jpg?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE4NzAwMjI=,size_16,color_FFFFFF,t_70\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure >\n<noscript><img src=\"https:\/\/img-blog.csdnimg.cn\/20201205031557506.jpg?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE4NzAwMjI=,size_16,color_FFFFFF,t_70\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure><\/noscript>\n\n\n\n<figure class=\"wp-block-image\"><img   class=\"lazyload\" data-src=\"https:\/\/img-blog.csdnimg.cn\/20201205031557466.jpg?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE4NzAwMjI=,size_16,color_FFFFFF,t_70\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure >\n<noscript><img src=\"https:\/\/img-blog.csdnimg.cn\/20201205031557466.jpg?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE4NzAwMjI=,size_16,color_FFFFFF,t_70\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure><\/noscript>\n\n\n\n<p>4.8\u8be6\u7ec6\u7684\u5b9e\u9a8c\u8d44\u6599\u4ee5\u53ca\u6307\u5bfcPPT\u8bf7\u8bbf\u95ee\u7b14\u8005GitHub\u5730\u5740\uff1a<a href=\"https:\/\/github.com\/LJF2402901363\/database_experiment.git\" target=\"_blank\"  rel=\"nofollow\" >https:\/\/github.com\/LJF2402901363\/database_experiment.git<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>4.\u89c6\u56fe\u5b9e\u9a8c 4.1\u89c6\u56fe\u7684\u5b9a\u4e49 \u200b MySQL \u89c6\u56fe\uff08View\uff09\u662f\u4e00\u79cd\u865a\u62df\u5b58\u5728\u7684\u8868\uff0c\u540c\u771f\u5b9e\u8868\u4e00\u6837\uff0c\u89c6\u56fe\u4e5f\u7531\u5217\u548c\u884c\u6784\u6210\uff0c\u4f46\u89c6\u56fe\u5e76\u4e0d\u5b9e &#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[120],"tags":[95,134,133,132],"_links":{"self":[{"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/posts\/371"}],"collection":[{"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/comments?post=371"}],"version-history":[{"count":3,"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/posts\/371\/revisions"}],"predecessor-version":[{"id":391,"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/posts\/371\/revisions\/391"}],"wp:attachment":[{"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/media?parent=371"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/categories?post=371"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/tags?post=371"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}