{"id":1072,"date":"2015-04-15T17:32:23","date_gmt":"2015-04-15T09:32:23","guid":{"rendered":"http:\/\/www.821121.com\/?p=1072"},"modified":"2020-12-15T11:26:08","modified_gmt":"2020-12-15T03:26:08","slug":"oracle-sql%e8%af%ad%e5%8f%a5-%e4%b9%8b-substr%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"http:\/\/www.821121.com\/?p=1072","title":{"rendered":"Oracle SQL\u8bed\u53e5 \u4e4b substr\u51fd\u6570"},"content":{"rendered":"<h1>\u5b9a\u4e49<\/h1>\n<p>substr\uff08\uff09\u51fd\u6570\uff1a\u5bf9\u6307\u5b9a\u5b57\u6bb5\u6240\u4f20\u56de\u7684\u5b57\u7b26\uff0c\u6309\u6307\u5b9a\u4f4d\u7f6e\u4e0e\u622a\u53d6\u957f\u5ea6\u8fdb\u884c\u622a\u53d6\uff0c\u5305\u62ec\u82f1\u6587\u3001\u4e2d\u6587\u3001\u6570\u5b57\uff08\u5176\u4e2d\uff0c\u4e0d\u5bf9\u6570\u5b57\u8fdb\u884c\u56db\u820d\u4e94\u5165\uff09<\/p>\n<h1>\u8bed\u6cd5<\/h1>\n<p>substr\uff08\u6307\u5b9a\u4f4d\u7f6e\uff0c\u622a\u53d6\u957f\u5ea6\uff09<\/p>\n<h1>\u8fd4\u56de\u503c\u7c7b\u578b<\/h1>\n<p>\u5b57\u7b26<\/p>\n<h1>\u4e3e\u4f8b<\/h1>\n<h2>\u672a\u52a0\u51fd\u6570<\/h2>\n<pre><code class=\"language-sql\">select value from test<\/code><\/pre>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/12\/image-1607938141772.png\" alt=\"file\" \/><\/p>\n<h2>\u52a0\u5165\u51fd\u6570<\/h2>\n<pre><code class=\"language-sql\">select substr(value,0,3) from test<\/code><\/pre>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/12\/image-1607938169530.png\" alt=\"file\" \/><\/p>\n<pre><code class=\"language-sql\">select substr(value,6,4) from test<\/code><\/pre>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/12\/image-1607938195587.png\" alt=\"file\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b9a\u4e49 substr\uff08\uff09\u51fd\u6570\uff1a\u5bf9\u6307\u5b9a\u5b57\u6bb5\u6240\u4f20\u56de\u7684\u5b57\u7b26<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48],"tags":[],"class_list":["post-1072","post","type-post","status-publish","format-standard","hentry","category-sql"],"_links":{"self":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1072","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1072"}],"version-history":[{"count":1,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1072\/revisions"}],"predecessor-version":[{"id":1079,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1072\/revisions\/1079"}],"wp:attachment":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1072"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1072"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1072"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}