{"id":189,"date":"2022-04-20T12:15:06","date_gmt":"2022-04-20T04:15:06","guid":{"rendered":"https:\/\/www.01j.top\/?p=189"},"modified":"2022-04-20T12:15:07","modified_gmt":"2022-04-20T04:15:07","slug":"oracle%e9%80%9a%e9%85%8d%e7%ac%a6%e8%bf%90%e7%ae%97%e7%ac%a6%e7%9a%84%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.01j.top\/?p=189","title":{"rendered":"Oracle\u901a\u914d\u7b26,\u8fd0\u7b97\u7b26\u7684\u4f7f\u7528"},"content":{"rendered":"\n<p class=\"is-style-text-indent-default\">\u7528\u4e8ewhere\u6bd4\u8f83\u6761\u4ef6\u7684\u6709 \uff1a<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">\u7b49\u4e8e\uff1a=\u3001\u3001&gt;=\u3001&lt;&gt;<\/p>\n\n\n\n<blockquote class=\"wp-block-quote\"><p>,&lt;:&gt;<\/p><p>=.&lt;=:\u5927\u4e8e\u7b49\u4e8e\uff0c\u5c0f\u4e8e\u7b49\u4e8e<\/p><\/blockquote>\n\n\n\n<p class=\"is-style-text-indent-default\">=:\u7b49\u4e8e<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">!=,&lt;&gt;,^=:\u4e0d\u7b49\u4e8e<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">\u5305\u542b\uff1ain\u3001not in exists\u3001not exists<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">\u8303\u56f4\uff1abetween\u2026and\u3001not between\u2026.and<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">\u5339\u914d\u6d4b\u8bd5\uff1alike\u3001not like<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">Null\u6d4b\u8bd5\uff1ais null\u3001is not null<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">\u5e03\u5c14\u94fe\u63a5\uff1aand\u3001or\u3001not<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">\u901a\u914d\u7b26 \uff1a<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">\u5728where\u5b50\u53e5\u4e2d\uff0c\u901a\u914d\u7b26\u53ef\u4e0elike\u6761\u4ef6\u4e00\u8d77\u4f7f\u7528\u3002\u5728Oracle\u4e2d\uff1a<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">%(\u767e\u5206\u53f7)\uff1a \u7528\u6765\u8868\u793a\u4efb\u610f\u6570\u91cf\u7684\u5b57\u7b26\uff0c\u6216\u8005\u53ef\u80fd\u6839\u672c\u6ca1\u6709\u5b57\u7b26\u3002<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">_(\u4e0b\u5212\u7ebf)\uff1a \u8868\u793a\u786e\u5207\u7684\u672a\u77e5\u5b57\u7b26\u3002<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">?(\u95ee\u53f7)\uff1a \u7528\u6765\u8868\u793a\u786e\u5207\u7684\u672a\u77e5\u5b57\u7b26\u3002<\/p>\n\n\n\n<h1>(\u4e95\u53f7)\uff1a \u7528\u6765\u8868\u793a\u786e\u5207\u7684\u963f\u62c9\u4f2f\u6570\u5b57\uff0c0\u52309\u3002<\/h1>\n\n\n\n<p class=\"is-style-text-indent-default\"><a href=\"\u65b9\u62ec\u53f7\">a-d<\/a>\uff1a\u7528\u6765\u8868\u793a\u5b57\u7b26\u8303\u56f4\uff0c\u5728\u8fd9\u91cc\u662f\u4ecea\u5230d\u3002<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">\u5355\u5f15\u53f7(&#8216;)\uff1a\u5728Oracle\u4e2d\uff0c\u5e94\u8be5\u53ea\u4f7f\u7528\u5355\u5f15\u53f7\u5c06\u6587\u672c\u548c\u5b57\u7b26\u548c\u65e5\u671f\u62ec\u8d77\u6765\uff0c\u4e0d\u80fd\u4f7f\u7528\u5f15\u53f7(\u5305\u62ec\u5355\u53cc\u5f15\u53f7)\u5c06\u6570\u5b57\u62ec\u8d77\u6765\u3002<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">\u53cc\u5f15\u53f7(&#8220;)\uff1a\u5728Oracle\u4e2d\uff0c\u5355\u53cc\u5f15\u53f7\u542b\u4e49\u4e0d\u540c\u3002\u53cc\u5f15\u53f7\u88ab\u7528\u6765\u5c06\u5305\u542b\u7279\u5b9a\u5b57\u7b26\u6216\u8005\u7a7a\u683c\u7684\u5217\u522b\u540d\u62ec\u8d77\u6765\u3002\u53cc\u5f15\u53f7\u8fd8\u88ab\u7528\u6765\u5c06\u6587\u672c\u653e\u5165\u65e5\u671f\u683c\u5f0f\u3002<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">\u6487\u53f7(&#8216;)\uff1a\u5728Oracle\u4e2d\uff0c\u6487\u53f7\u4e5f\u53ef\u4ee5\u5199\u6210\u5f7c\u6b64\u76f8\u90bb\u7684\u4e24\u4e2a\u5355\u5f15\u53f7\u3002\u4e3a\u4e86\u5728\u4f9b\u5e94\u5546\u540d\u5b57\u4e2d\u95f4\u67e5\u627e\u6240\u6709\u5e26\u6487\u53f7\u7684\u4f9b\u5e94\u5546\u540d\u5b57\uff0c\u53ef\u4ee5\u8fd9\u6837\u7f16\u5199\u4ee3\u7801\uff1a<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">select * from l_suppliers where supplier_name like &#8216;%&#8221;%&#8217;<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">&amp;\u7b26\u53f7\uff1a\u5728Oracle\u4e2d,&amp;\u7b26\u53f7\u5e38\u7528\u6765\u6307\u51fa\u4e00\u4e2a\u53d8\u91cf\u3002\u4f8b\u5982\uff0c&amp;fox\u662f\u4e00\u4e2a\u53d8\u91cf\uff0c\u7a0d\u5fae\u6709\u70b9\u4e0d\u540c\u7684\u4e00\u79cd&amp;&amp; fox\u3002\u6bcf\u5f53&amp;fox\u51fa\u73b0\u5728Oracle\u811a\u672c\u4e2d\u65f6\uff0c\u90fd\u4f1a\u8981\u6c42\u60a8\u4e3a\u5b83\u63d0\u4f9b\u4e00\u4e2a\u503c\u3002\u800c\u4f7f\u7528&amp;&amp;fox\uff0c\u60a8\u53ea\u9700\u8981\u5728&amp; &amp;fox\u7b2c\u4e00\u6b21\u51fa\u73b0\u65f6\u4e3a\u5b83\u63d0\u4f9b\u53d8\u91cf\u503c\u3002\u5982\u679c\u60f3\u5c06&amp;\u7b26\u53f7\u4f5c\u4e3a\u666e\u901a\u7684\u7b26\u53f7\u4f7f\u7528\uff0c\u5219\u5e94\u8be5\u5173\u95ed\u8fd9\u4e2a\u7279\u6027\u3002\u8981\u60f3\u5173\u95ed\u8fd9\u4e2a\u7279\u6027\uff0c\u53ef\u4ee5\u8fd0\u884c\u4ee5\u4e0b\u7684\u547d\u4ee4\uff1a set define off \uff0c\u8fd9\u662f\u4e00\u4e2aSQLplus\u547d\u4ee4\uff0c\u4e0d\u662f\u4e00\u4e2aSQL\u547d\u4ee4\u3002SQLplus\u8bbe\u7f6e\u4e86SQL\u5728Oracle\u4e2d\u8fd0\u884c\u7684\u73af\u5883\u3002<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">\u53cc\u7ad6\u7ebf(||)\uff1aOracle\u4f7f\u7528\u53cc\u7ad6\u7ebf\u8868\u793a\u5b57\u7b26\u4e32\u8fde\u63a5\u51fd\u6570\u3002<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">\u661f\u53f7(*)\uff1aselect *\u610f\u5473\u7740\u9009\u62e9\u6240\u6709\u7684\u5217\uff0ccount(*)\u610f\u5473\u7740\u8ba1\u7b97\u6240\u6709\u7684\u884c\uff0c\u8868\u793a\u901a\u914d\u7b26\u65f6\uff0c\u8868\u793a0\u4e2a\u6216\u4efb\u610f\u591a\u4e2a\u5b57\u7b26\u3002<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">\u6b63\u659c\u6760(\/)\uff1a\u5728Oracle\u4e2d\uff0c\u7528\u6765\u7ec8\u6b62SQL\u8bed\u53e5\u3002\u66f4\u51c6\u786e\u7684\u8bf4\uff0c\u662f\u8868\u793a\u4e86\u201c\u8fd0\u884c\u73b0\u5728\u4f4d\u4e8e\u7f13\u51b2\u533a\u7684SQL\u4ee3\u7801\u201d\u3002\u6b63\u659c\u6760\u4e5f\u7528\u4f5c\u5206\u9694\u9879\u3002<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">\u591a\u884c\u6ce8\u91ca\uff1a\/<em>\u2026\u2026<\/em>\/\u3002<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">\u4e0d\u7b49\u4e8e\uff1a\u6709\u591a\u79cd\u8868\u8fbe\u65b9\u5f0f\uff1a!=\u3001^=\u3001&lt;&gt;\u3001not xxx=yyy\u3001not(xxx=yyy)<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p class=\"is-style-text-indent-default\">\u5728Oracle\u4e2d\u3002&#8221;\uff1a&#8221;\u67092\u4e2d\u610f\u601d\uff1b<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">\u4e00\uff1a\u7ed9\u53d8\u91cf \u8d4b\u503c \uff0c \u5982\uff0c names varchar2(10) :=&#8217;aa&#8217;; \u8fd9\u662f\u628a&#8221;aa&#8221;\u8d4b\u503c\u7ed9\u53d8\u91cfnames<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">\u4e8c\uff1a\u8868\u793a\u5f15\u7528\u3002\u5373\u5f15\u7528\u8868\u4e2d\u5b57\u6bb5\u6240\u5bf9\u5e94\u7684\u503c<\/p>\n\n\n\n<p class=\"is-style-text-indent-default\">\u5982\uff1aemp\u8868\u4e2d\u6709\u4e2aname\u4e3a\u201cBob\u201d\uff0c\u90a3\u4e48 : old.name \u7684\u503c\u5c31\u662f&#8221;Bob&#8221;\u3002<br><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7528\u4e8ewhere\u6bd4\u8f83\u6761\u4ef6\u7684\u6709 \uff1a \u7b49\u4e8e\uff1a=\u3001\u3001&gt;=\u3001&lt;&gt; ,&lt;:&gt; =.&lt;= [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[29],"tags":[],"_links":{"self":[{"href":"https:\/\/www.01j.top\/index.php?rest_route=\/wp\/v2\/posts\/189"}],"collection":[{"href":"https:\/\/www.01j.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.01j.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.01j.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.01j.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=189"}],"version-history":[{"count":1,"href":"https:\/\/www.01j.top\/index.php?rest_route=\/wp\/v2\/posts\/189\/revisions"}],"predecessor-version":[{"id":190,"href":"https:\/\/www.01j.top\/index.php?rest_route=\/wp\/v2\/posts\/189\/revisions\/190"}],"wp:attachment":[{"href":"https:\/\/www.01j.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=189"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.01j.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=189"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.01j.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=189"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}